Installation

Download tSFM and example data using the below bash command or the zip link:

git clone https://github.com/tlawrence3/tSFM.git

Change into the tSFM directory

cd tSFM

We recommend using anaconda and conda enviroments for installing and using tSFM. The following commands will create a conda environment with all the required packages and activate it.

conda create -n tSFM python=3.8 pandas numpy cython pytest-runner pytest scipy patsy mpmath statsmodels
conda activate tSFM

Now we can install tSFM and run a basic test the installation with the below commands:

python setup.py install
tsfm -h

Quickstart Tutorial

tSFM may be used to analyze any protein or RNA families. As a quick introduction to the functionality of tSFM we will be utilizing data from:

Kelly, P., F. Hadi-Nezhad, D. Y. Liu, T. J. Lawrence, R. G. Linington, M. Ibba, and D. H. Ardell. 2020. Targeting tRNA-synthetase interactions towards novel therapeutic discovery against eukaryotic pathogens. PLOS Neglected Tropical Diseases 14: e0007983.

Let us recreate function logos for the human tRNA data provided by this study.

First we need to change into the example data directory. This directory contains all of the aligned tRNA sequences used for analysis in Kelly et al. 2020.
```
cd Kelly2020_data
```
To create single site and basepair RNA function logos for the human tRNA data we can use the command:
```
tsfm -e NSB -x 1 -c tRNA_L_skel_Leish.sites74.struct.cove --logo -p 10 HOMO/HOMO 
```
Let us break this command down so we can understand the options:

a. The below -e option sets the entropy estimator to the Bayesian estimator NSB (which is the default). This can also be set to the older and more inaccurate Miller-Madow estimator with argument Miller.
```
-e NSB
```
b. The -x option indicates the maximum sample size for the calculation of the exact entropy correction (larger sample sizes use the estimator set with the -e option). Correction values can feasibly be calculated for sample sizes up to ~16, but the NSB estimator is preferred except for the smallest sample sizes.
```
 -x 1
```
c. The -c option provides the path to the file containing the secondary structure annotation in cove format for RNA input files. This is required for basepair function logos and can be provided in infernal, cove, or text formats. These formats are described in below in the Appendix section. The secondary structure annotation must conform to and encode the RNA structural alignment common to the input alignment files and usually must be prepared together with them.
```
  -c tRNA_L_skel_Leish.sites74.struct.cove
```
d. The below option indicates that we want graphical output of function logos in EPS format. If we excluded this option, tSFM would only produce the text output file with statistics on tRNA CIFs.
```
  --logo
```
e. The -p option indicates the number of processor cores we want to utilize during the calculations. Below we have indicated we want to use 10 cores.
```
  -p 10
```
f. Lastly, the below argument provides the path and clade prefix to the input alignment files containing our tRNA sequences. Multiple sets of input files for multiple clades can be processed at the same time by providing multiple arguments. tSFM expects input alignment files in ClustalW format, all named with a common prefix corresponding to their clade followed by a distinct one-letter symbol for the functional class of sequences in the alignment, separated by an underscore character. For example, in the HOMO directory, we have multiple alignment files including HOMO_A.aln, in which the prefix HOMO indicates the clade and the postfix _A indicates the alignment file containing sequences for the tRNA-Ala functional class.
```
  HOMO/HOMO
```
For each clade on input, tSFM produces a text output file in the same directory where the program is run. This command produces the output file HOMO_CIFs.txt, more generally <clade-prefix>_CIFs.txt. The text output file has two sections, one for paired-site features and one for single-site features. Examples of records from each of these two sections is shown below.

#bp coord state N info p-value BH class:height:p-value:BH

bp: (0, 72) AU 14 2.789 NA NA X:0.861:NA:NA L:0.108:NA:NA K:0.032:NA:NA

The first record in the output file is for feature (0, 72)AU: the number of sequences sharing this features is in column N, the total information (the total height of the stack (in bits) from function logo of feature AU at coordinate (0,72)) is in column info, the p-value of the calculated info is in column p-value and the multiple-test corrected significance of the p-value is in the next column (this column is named with the method used for multiple test correction for significance calculations). Also, the last column shows a list of information for each tRNA class at feature (0, 72)AU with the format <class>:<symbol-height>:<pvalue>:<BH> which refers to the tRNA functional class single letter symbol, the height of the symbol within the stack, the p-value and the corrected significance value, respectively.

A record for the single site is similar to the paired-site except that the first column is ss instead of bp.

#ss coord state N info p-value BH class:height:p-value:BH

ss: 0 C 13 4.131 NA NA Y:1.000:NA:NA

The values for the p-values and the significance are NA because we did not calculate p-values in the command described above. See the section Statistical significance testing for CIFs below, which describes options for p-value calculations.
To avoid having to manually enter the names and prefixes for each of the parasite clades we can take a shortcut by using bash loops. The below command will loop through each folder and produce function logos for each clade in the running directory.
```
for d in */; do tsfm -e NSB -x 5 -c tRNA_L_skel_Leish.sites74.struct.cove --logo -p 10 $d${d%/}; done
```
To create ID/KLD logos and the data table for the bubble plots in Kelly et al. 2020. for clades HOMO versus MAJOR, we can run the command below. Note that option --bubbles or -B requires designation of a specific clade to use as a reference clade (for gains and losses), using option --clade.
```
tsfm -c tRNA_L_skel_Leish.sites74.struct.cove -e MM -x 5 --idlogos --kldlogos -B --clade HOMO MAJOR/MAJOR HOMO/HOMO
```
The text output of this command will be two files F_HOMO_B_MAJOR_Table.txt and F_MAJOR_B_HOMO_Table.txt which can be used to create the bubble plots. Here "F" stands for "Foreground" and "B" for "Background." An example of a record from the output text file is shown below.

aa coord state fbits fht gainbits gainfht lossbits lossfht convbits convfht x y sprinzl

K 1 A 2.7602 0.0 0.7285 0.0 0.0 0.0 0.2913 0.0 0.0 0.0 0.0

This example shows at feature 1A of ID logo: the total height of stack-bar in column gainbits, and the height of symbol K in this stack-bar in column gainfht. Also, it shows at feature 1A of KLD logo: the total height of stack-bar in column convbits and the height of symbol K in this stack-bar in column convfht. The columns x, y and sprinzl are set to 0 and will be filled later prior to creating the bubble plots by mapping each feature to the tRNA sprinzl coordinates.

Statistical Significance Testing for CIFs

tSFM implements statisitical significance testing for CIFs and function logos using permutation-based null distributions and corrects for multiple tests using multiple user-determined FDR or FWER methods. The -P option indicates the number of permutations generated for building the null distributions and the -C option indicates the method for multiple testing correction. Options include the Bonferroni, Sidak, Holm, Holm-Sidak, Simes-Hochberg, or Hommel methods for FWER control, or the Benjamini-Hochberg, Benjamini-Yekutieli or Gavrilov-Benjamini-Sarkar methods for FDR control. The default option is BH for the Benjamini-Hochberg FDR.

To calculate the significance of CIFs stack-heights with 100 permutations for the humans tRNA data using the NSB entropy estimator we can use the command:

tsfm -e NSB -x 5 -c tRNA_L_skel_Leish.sites74.struct.cove --logo -T stacks -P 100 HOMO/HOMO

The -T option will set the significance test for only CIF total stack-heights. This can also be set to letters to calculate the significance for only CIF letter-heights within stacks. The default is to calculate significance for both stacks and letters, but for many applications and comparisons, we recommend to test only stacks. The difference plays into the number of comparisons or tests requiring correction, where generally fewer is better. If one is interested in only which CIFs are significant, use stacks. If one wants to test specific functional associations, use letters, otherwise use both.

Similarly, you can restrict CIF calculation and significance testing to only single-site features with the --single option or to only paired-site features with the --nosingle option. The -P option will set the number of permutations for significance test of CIFs to 100.

Statistical Significance Testing for CIF Divergences

tSFM implements statistical significance testing for CIF divergences, specifically Information Difference (ID) logos and Kullback-Leibler Divergence (KLD) logos using permutation-based null distributions. P-values can be calculated by one of three algorithms called ECDF, ECDF_pseudo, and GPD chosen by the user through the option -m. The default method is GPD.

The algorithm ECDF_pseudo is the Monte Carlo permutation-based approximation calculated according to the formula (number of exceedances + 1)/(number of permutations + 1), where exceedances means the fraction of permutation replicates yielding statistics as large or larger than the observed divergence. Algorithm ECDF is similar to ECDF_pseudo except that when the number of permutation exceedances reaches the value of option --exceedances (with default 10) the p-value will be calculated according to the formula (number of exceedances)/(number of permutations) and returned, otherwise when there are fewer exceedances, the ECDF_pseudo formula is used. Algorithm GPD is implemented according to the "Peaks-over-Threshhold" (PoT) tail-approximation approach described as algorithm APPROXIMATE in the manuscript, which includes the ECDF and ECDF_pseudo algorithms as special cases. tSFM also calculates the confidence intervals for all the p-values except for those calculated with pseudocounts.

To calculate the significance of KLD divergence values with 100 permutations for the contrast of the human and MAJOR clades, we can specify which algorithm to use as demonstrated in the three examples below:

Method ECDF_pseudo:
```
tsfm --kldperms 100 -m ECDF_pseudo -c tRNA_L_skel_Leish.sites74.struct.cove HOMO/HOMO MAJOR/MAJOR
```
The --kldperms option will set the number of permutations to compute the significance of KLD values to 100. More than one input clade must be specified.
Method ECDF:
```
tsfm --kldperms 100  -m ECDF --alpha 0.01 -c tRNA_L_skel_Leish.sites74.struct.cove HOMO/HOMO MAJOR/MAJOR
```
The --alpha option will set the significance level to compute the confidence interval of p-values. Its default is 0.05.
Method GPD:
```
tsfm --kldperms 100 -m GPD --targetperms 70 --exceedances 5 --peaks 50 -c tRNA_L_skel_Leish.sites74.struct.cove HOMO/HOMO MAJOR/MAJOR
```
In addition to the previous options, there are options --targetperms and --peaks specific to method GPD. Options targetperms and peaks are referred to as variables T and U, respectively in the algorithm APPROXIMATE in the tSFM paper. Also, the option exceedances is referred to as parameter S and is used for both methods ECDF and GPD. The default value for option targetperms is 500. The value of the option targetperms should be less than the maximum permutation number indicated with option --kldperms or --idperms. The default value of exceedances is 10. This number also needs to be less than the maximum permutation number and need not be (much) larger than 10, which is a standard rule-of-thumb for estimation of binomial proportions. The default for option peaks is 250; In the algorithm APPROXIMATE the number of peaks over threshold will be set to the minimum of this value and one-third of the permutations. The value of option peaks needs to be less than the maximum permutation number.

The output of KLD and ID logo significance from the examples described above will be two text files named KLD_HOMO_MAJOR_stats.txt and KLD_MAJOR_HOMO_stats.txt. An example of a record from the output text file is shown below.

Coord	State	Statistic	Sample-Sz-Back	Sample-Sz-Fore	P-value	CI.Lower	CI.Upper	Adjusted-P	Permutations	P-Val-Method	GPD-shape	GPD-scale	Peaks	ADtest-P-val	Freqs-Back	Freqs-Fore
2	U	0.75	30	72	2.46e-14	0.0	3.22e-05	7.07e-13	70.0	p_gpd	0.15	0.00037	13.0	0.97	D13E16Y1	D24E24N24s

This record shows the significance of the KLD statistic at feature U2 along with other information at this feature including: confidence interval (with level determined by option --alpha) in columns CI.Lower and CI.Upper, multiple-test adjusted p-value in column Adjusted-P, number of permutations with which the p-value is calculated in column Permutations, the method used for calculating the p-value in column P-Val-Method which can take the values: p_ecdf, p_ecdf_with_pseudo, p_ecdf_with_pseudo (p_gpd=0) and p_gpd. If the p-value is calculated with GPD, the parameters of the GPD calculation will be shown in columns GPD-shape, GPD-scale and Peaks describing the maximum likelihood estimated parameters of the GPD distribution and the number of peaks over threshold. Also the column ADtest-P-val shows the pvalue of the goodness-of-fit test of the extreme permutation values to the GPD distribution.

To calculate the significance of ID-values of single-site features only, for clade HOMO against clades MAJOR and ENRIETTII with 100 permutations using the method GPD we can use this command (note that running this command can take about 30 minutes.)

tsfm --idperms 100 -m GPD --targetperms 50 --exceedances 5 --peaks 50 --single -e NSB -x 5 --clade HOMO HOMO/HOMO MAJOR/MAJOR ENRIETTII/ENRIETTII

The option --idperms will set the number of permutations to compute significance of ID values to 100

--idperms 100

The option --clade will contrast two clades MAJOR and ENRIETTII against HOMO rather than all-against-all:

--clade HOMO

The option --targetperms will set the permutation number at which we attempt to fit the extreme permutation values to GPD.

--targetperms 50

To calculate the significance of KLD-values of paired-site features only, for clade HOMO against clades MAJOR with 100 permutations using the method GPD use the command below. The consensus secondary structure of tRNAs indicated by option -c is required to calculate functional information of base-pair features.

tsfm --kldperms 100 -m GPD --targetperms 50 --exceedances 5 --peaks 50 --nosingle -c tRNA_L_skel_Leish.sites74.struct.cove --clade HOMO HOMO/HOMO MAJOR/MAJOR

Usage and Options to tSFM

file_prefix             One or more paths/file-prefix strings corresponding to
                        sets of input files compiled for a single clade in
                        clustalW format. Input files should be named
                        <path>/<prefix>_<functional-class>.<extension>, where
                        <functional_class> is a single letter

optional arguments:
  -h, --help            show this help message and exit
  -i INFERNAL, --infernal INFERNAL
                        Use secondary structure file INFERNAL, required to
                        calculate functional information of base-pair
                        features, in Infernal format
  -c COVE, --cove COVE  Use secondary structure file COVE, required to
                        calculate functional information of base-pair
                        features, in COVE format. Example: 
                        #=CS >>>>>>>..>>>>...........<<<<.>>>>>.......<<<<<.....>>>>>....
                        #=CS ...<<<<<<<<<<<<.
  -t TEXT, --text TEXT  Use secondary structure file TEXT, required to
                        calculate functional information of base-pair
                        features, is in text format. Example:
                        "A:0,72,1,71,2,70,3,69,4,68,5,67,6,66
                        D:9,25,10,24,11,23,12,22
                        C:27,43,28,42,29,41,30,40,31,39
                        T:49,65,50,64,51,63,52,62,53,61"
  -s, --single          Do not calculate functional information for paired
                        features. Calculate for single-site features only.
  -n, --nosingle        Do not calculate functional information for single-
                        site features. Calculate for paired-site features
                        only.
  -V, --version         show program's version number and exit
  -p PROCESSES, --processes PROCESSES
                        Set the maximum number of concurrent processes.
                        Default is the number of cores reported by the
                        operating system.
  -e {NSB,MM}, --entropy {NSB,MM}
                        Use entropy estimator ENTROPY when conditional sample
                        sizes exceed maximum for exact calculation. If value
                        is "NSB", use Nemenman-Shafee-Bialek estimator. If
                        value is "MM", use Miller-Madow estimator. Default is
                        NSB
  -x EXACT, --exact EXACT
                        Maximum conditional sample size to exactly calculate
                        entropy correction. Default = 5
  -l, --logos           Visualize feature information using function/inverse
                        function logos in extended postscript format.
  -v, --inverse         Additionally calculate functional information for
                        inverse features/logos (features under-represented in
                        specific functional classes)
  -P PERMUTATIONS, --permutations PERMUTATIONS
                        Calculate the significance of CIFs by a permutation
                        test, with a number of permutations equal to
                        PERMUTATIONS (an integer). Default is to not calculate
                        significance of CIFs.
  -C, --correction {bonferroni,sidak,holm,holm-sidak,simes-hochberg,hommel,BH,BY,GBS}
                        Specify a method for multiple test correction for
                        significance calculations: bonferroni, sidak, holm,
                        holm-sidak, simes-hochberg, hommel, BH (Benjamini-
                        Hochberg FDR), BY (Benjamini-Yekutieli FDR) or GBS
                        (Gavrilov-Benjamini-Sarkar FDR). Default is BH
  -T {stacks,letters,both}
                        Test the significance of only CIF stack-heights, only
                        CIF letter-heights, or both. Default is both.
  -I, --idlogos         Compute Information Differece logos for each pair of
                        clades
  -K, --kldlogos        Compute Kullback-Liebler Divergence logos for each
                        pair of clades
  -B, --bubbles         Compute input table for structural bubble-plots (to be
                        computed in R) like those appearing in Kelly et al.
                        (2020).
  --kldperms KLDPERMS   Set the number of permutations to compute significance
                        of Kullback-Leibler Divergences. Default is to not
                        calculate signifiance.
  --idperms IDPERMS     Set the number of permutations to compute significance
                        of Information Differences (SLOW). Default is to not
                        calculate signifiance.
  -J, --JSD             Produce pairwise distance matrices between function
                        logos for different taxa based on Jensen-Shannon
                        Divergences
  --clade CLADE         Contrast clade CLADE against all others. CLADE should
                        be one of the file-prefix strings passed as a required
                        argument to the program, stripped of its path. Default
                        is to compute contrasts for all pairs of clades.
  -m {GPD,ECDF_pseudo,ECDF}, --pmethod {GPD,ECDF_pseudo,ECDF}
                        Set the p-value calculation algorithm for KLD/ID CIF Divergence significance calculations.
                        If value is "GPD", p-values for large divergences will be estimated by the Peaks-over-
                        Threshold method based on the Generalized Pareto Distribution, those for small divergences
                        with E exceedances (default 10) will be calculated as a binomial proportion (ECDF method)
                        and p-values for divergences that can't be estimated by either of those methods will be
                        estimated as a binomial proportion with pseudo-counts (ECDF_pseudo method). If value is
                        "ECDF", all p-values will be calculated by ECDF method or ECDF_pseudo method. If value is
                        "ECDF_pseudo", all the p-values will be calculated using ECDF_pseudo method. Default is GPD
  --targetperms TARGETPERMS
                        Set the initial target number of permutations at which GPD-pvalue will be initially
                        calculated. Default is 500.
  --exceedances EXCEEDANCES
                        Set the number of exceedances for which ECDF-based p-values will be calculated without
                        pseudo-counts. Default is 10.
  --peaks PEAKS         Set the number of Peaks-over-Threshold to use to initially estimate GPD. The actual value
                        used will be the minimum of this value and one-third of permutations. Default is 250.
  --alpha ALPHA         Set the significance level to compute the confidence interval of pvalues. Default is 0.05

Recreating the Figure and Supplemental Figures from the tSFM Publication

Creating the supplemental figure <KLD-Significance_ENRIETTII_MAJOR.eps>

Create the table of statistics for KLD logos of clade ENRIETTII vs HOMO using the pvalue-calculation-method GPD with maximum permutation number = 10000, target permutation number 500, and calculate the Confidence Interval of p-values with 5% significance level. The running time on an Intel Core i7 Dell XPS was ~34 minutes. The outputs are two text files: KLD_ENRIETTII_HOMO_stats.txt and KLD_HOMO_ENRIETTII_stats.txt

mkdir GPD
cd Kelly2020_data
tsfm --kldperms 10000 -m GPD -c tRNA_L_skel_Leish.sites74.struct.cove HOMO/HOMO ENRIETTII/ENRIETTII
mv KLD_ENRIETTII_HOMO_stats.txt KLD_HOMO_ENRIETTII_stats.txt GPD

Create the table of statistics for KLD logos of clade MAJOR vs HOMO using the pvalue-calculation-method GPD with maximum permutation number = 10000, target permutation number 500, and calculate the Confidence Interval of p-values with 5% significance level. The running time on an Intel Core i7 Dell XPS was ~52.6 minutes. The outputs are two text files: KLD_MAJOR_HOMO_stats.txt and KLD_HOMO_MAJOR_stats.txt

tsfm --kldperms 10000 -m GPD -c tRNA_L_skel_Leish.sites74.struct.cove HOMO/HOMO MAJOR/MAJOR
mv KLD_MAJOR_HOMO_stats.txt KLD_HOMO_MAJOR_stats.txt GPD

Create the figure using the KLD tables in GPD folder by running this R script:

library(latex2exp)
library(ggplot2)
library(ggpubr)
#setwd("PATH/TO/WHERE/THE/FOLDERS/GPD/ECDF/ECDF_pseudo/ARE/LOCATED") # make sure to set your working directory to where the input data folders GPD, ECDF and ECDF_pseudo are located.
spetralc <-c("#D53E4F" ,"#F46D43" ,"#FDAE61" , "#66C2A5" ,"#3288BD","#313695")
breaksarray <- c(1,2,4,10,30,80,200,500)
legendbreaks <- logb(breaksarray, base = 2)
legendlables <- as.character(breaksarray)
KLD_paths <-
  c(
    "GPD/KLD_MAJOR_HOMO_stats.txt",
    "GPD/KLD_HOMO_MAJOR_stats.txt",
    "GPD/KLD_ENRIETTII_HOMO_stats.txt",
    "GPD/KLD_HOMO_ENRIETTII_stats.txt"
  )
xlabels <- c("Kullback-Leibler Divergence","Kullback-Leibler Divergence","Kullback-Leibler Divergence","Kullback-Leibler Divergence")
clades <- c("MAJOR (n=664 sequences) against Homo (m=431 sequences)", "HOMO against MAJOR","ENRIETTII (n=160 sequences) against Homo     (m=431 sequences)", "HOMO against ENRIETTII")
plotls <- list()
for (i in 1:length(KLD_paths)) {
  signTable <- read.table(KLD_paths[i], header = TRUE, sep = "\t")
  signTable <- signTable[signTable$Sample.Sz.Back != 0 & signTable$Sample.Sz.Fore != 0 & signTable$Statistic != 0, ]
  signTable$harmonicmean <- 0
  for (j in 1:nrow(signTable)) {
    signTable$harmonicmean[j] = 1 / mean(1 / c(signTable$Sample.Sz.Back[j], signTable$Sample.Sz.Fore[j]))
  }
  p <- ggplot(signTable, aes_string( x = round(signTable$Statistic, 4), y = -log(signTable$P.value, base = 2),colour =         logb(signTable$harmonicmean, 2))) + 
    geom_point(aes_string( shape=signTable$P.Val.Method, colour = logb(signTable$harmonicmean, 2),size = (signTable$Permutations)))+ 
    scale_colour_gradientn( colours = spetralc, breaks = legendbreaks, labels = legendlables, guide = "colourbar", limits = c(0, 9.2)) + ylim(0,60)+# xlim(0,xlimits[i])+
    scale_size_continuous(limits = c(10,10001),breaks = c(10,2000,5000,10001),labels = c("10","2000","5000","10000"))+
    geom_errorbar(aes(ymin=-log(P.value + CI.Upper, base = 2), ymax=-log(P.value - CI.Lower, base = 2)))+
    scale_shape_manual( values = c(2,3,4,1), 
                    breaks = c( "p_ecdf",  "p_ecdf_with_pseudo", "p_ecdf_with_pseudo (p_gpd=0)", "p_gpd" ),
                    labels = c( "Pecdf", "Pecdf with pseudo", "Pecdf with_pseudo (pgpd=0)", "Pgpd" ))+
    ggtitle(clades[i]) + ylab(TeX("$Surprisal (-log_2(p))$")) + xlab(xlabels[i]) + labs(color = "Sample Size", shape = "PmethodType",size = "Permutation number") + 
    theme(
      axis.text = element_text(size = 13, family = "serif"),
      axis.title = element_text(size = 14, family = "serif"),
      legend.text = element_text(size = 12.5, family = "serif"),
      legend.title = element_text(size = 14, family = "serif"),
      plot.title = element_text(hjust = 0.5, family = "serif", size = 15, face = "bold" ), 
      legend.key.height = unit(0.9, "cm"),
      plot.margin=unit(c(0.2,0.2,0.5,0.2), "cm")
    )
  plotls[[i]] <- p  
}
setEPS()
postscript("KLD-Significance_ENRIETTII_MAJOR.eps", width = 16, height = 8,fonts=c("serif", "Palatino"))
p <- ggarrange( plotls[[1]], plotls[[2]], plotls[[3]], plotls[[4]],ncol = 2, nrow = 2, common.legend = TRUE,legend.grob =         get_legend(plotls[[2]]), legend = "right",labels = c("A", "B", "C","D"))
print(p)
dev.off()

Creating the Supplemental Figure <ID-Significance_ENRIETTII_MAJOR.eps>

Create the table of statistics for ID logos of clade MAJOR vs HOMO using the pvalue-calculation-method GPD with maximum permutation number = 10000, target permutation number 500, and calculate the Confidence Interval of p-values with 5% significance level. This will use the default entropy estimator NSB with default Maximum conditional sample size 5. The running time on an Intel Core i7 Dell XPS was ~4.76 hrs. The outputs are two text files: ID_MAJOR_HOMO_stats.txt and ID_HOMO_MAJOR_stats.txt

tsfm --idperms 10000 -m GPD -c tRNA_L_skel_Leish.sites74.struct.cove HOMO/HOMO MAJOR/MAJOR
mv ID_MAJOR_HOMO_stats.txt ID_HOMO_MAJOR_stats.txt GPD

Create the table of statistics for ID logos of clade ENRIETTII vs HOMO using the pvalue-calculation-method GPD with maximum permutation number = 10000, target permutation number 500, and calculate the Confidence Interval of p-values with 5% significance level. Default -e NSB -x 5. The running time on an Intel Core i7 Dell XPS was ~4.89 hrs. The outputs are two text files: ID_ENRIETTII_HOMO_stats.txt and ID_HOMO_ENRIETTII_stats.txt

tsfm --idperms 10000 -m GPD -c tRNA_L_skel_Leish.sites74.struct.cove HOMO/HOMO ENRIETTII/ENRIETTII
mv ID_ENRIETTII_HOMO_stats.txt ID_HOMO_ENRIETTII_stats.txt GPD

Create the figure using the ID tables in GPD folder by running this R script:

library(latex2exp)
library(ggplot2)
library(ggpubr)
#setwd("PATH/TO/WHERE/THE/FOLDERS/GPD/ECDF/ECDF_pseudo/ARE/LOCATED") # make sure to set your working directory to where the input data folders GPD, ECDF and ECDF_pseudo are located.
spetralc <-c("#D53E4F" ,"#F46D43" ,"#FDAE61" , "#66C2A5" ,"#3288BD","#313695")
breaksarray <- c(1,2,4,10,30,80,200,500)
legendbreaks <- logb(breaksarray, base = 2)
legendlables <- as.character(breaksarray)
ID_paths <-
  c(
    "GPD/ID_MAJOR_HOMO_stats.txt",
    "GPD/ID_HOMO_MAJOR_stats.txt",
    "GPD/ID_ENRIETTII_HOMO_stats.txt",
    "GPD/ID_HOMO_ENRIETTII_stats.txt"
  )
xlabels <- c("Information Difference","Information Difference","Information Difference","Information Difference")
clades <- c("MAJOR (n=664 sequences) against Homo (m=431 sequences)", "HOMO against MAJOR", "ENRIETTII (n=160 sequences) against Homo (m=431 sequences)", "HOMO against ENRIETTII")
plotls <- list()
for (i in 1:length(ID_paths)) {
  signTable <- read.table(ID_paths[i], header = TRUE, sep = "\t")
  signTable <- signTable[signTable$Sample.Sz.Back != 0 & signTable$Sample.Sz.Fore != 0 & signTable$Statistic != 0, ]
  signTable$harmonicmean <- 0
  for (j in 1:nrow(signTable)) {
    signTable$harmonicmean[j] = 1 / mean(1 / c(signTable$Sample.Sz.Back[j], signTable$Sample.Sz.Fore[j]))
  }
  p <- ggplot(signTable, aes_string( x = round(signTable$Statistic, 4), y = -log(signTable$P.value, base = 2),colour =         logb(signTable$harmonicmean, 2))) + 
    geom_point(aes_string( shape=signTable$P.Val.Method, colour = logb(signTable$harmonicmean, 2),size = (signTable$Permutations)))+ 
    scale_colour_gradientn( colours = spetralc, breaks = legendbreaks, labels = legendlables, guide = "colourbar", limits = c(0, 9.2)) + ylim(0,60)+# xlim(0,xlimits[i])+
    scale_size_continuous(limits = c(10,10001),breaks = c(10,2000,5000,10001),labels = c("10","2000","5000","10000"))+
    geom_errorbar(aes(ymin=-log(P.value + CI.Upper, base = 2), ymax=-log(P.value - CI.Lower, base = 2)))+
    scale_shape_manual( values = c(2,3,4,1), 
                    breaks = c( "p_ecdf",  "p_ecdf_with_pseudo", "p_ecdf_with_pseudo (p_gpd=0)", "p_gpd" ),
                    labels = c( "Pecdf", "Pecdf with pseudo", "Pecdf with_pseudo (pgpd=0)", "Pgpd" ))+
    ggtitle(clades[i]) + ylab(TeX("$Surprisal (-log_2(p))$")) + xlab(xlabels[i]) + labs(color = "Sample Size", shape = "PmethodType",size = "Permutation number") + 
    theme(
      axis.text = element_text(size = 13, family = "serif"),
      axis.title = element_text(size = 14, family = "serif"),
      legend.text = element_text(size = 12.5, family = "serif"),
      legend.title = element_text(size = 14, family = "serif"),
      plot.title = element_text(hjust = 0.5, family = "serif", size = 15, face = "bold" ), 
      legend.key.height = unit(0.9, "cm"),
      plot.margin=unit(c(0.2,0.2,0.5,0.2), "cm")
    )
  plotls[[i]] <- p  
}
setEPS()
postscript("ID-Significance_ENRIETTII_MAJOR.eps", width = 16, height = 8,fonts=c("serif", "Palatino"))
p <- ggarrange( plotls[[1]], plotls[[2]], plotls[[3]], plotls[[4]],ncol = 2, nrow = 2, common.legend = TRUE,legend.grob =         get_legend(plotls[[2]]), legend = "right",labels = c("A", "B", "C","D"))
print(p)
dev.off()

Creating the slope graph from tSFM manuscript.

Create the table of statistics for KLD logos of clade ENRIETTII vs HOMO using the pvalue-calculation-method ECDF_pseudo (naive Monte Carlo method using pseudo-counts) with maximum permutation number = 10000. The running time on a Linux compute node with 20 cores at 2301 MHz and 120 GB RAM was ~7.72 hrs. The outputs are two text files: KLD_ENRIETTII_HOMO_stats.txt and KLD_HOMO_ENRIETTII_stats.txt

mkdir ECDF_pseudo
tsfm --kldperms 10000 -m ECDF_pseudo -c tRNA_L_skel_Leish.sites74.struct.cove --clade HOMO HOMO/HOMO MAJOR/MAJOR
mv KLD_ENRIETTII_HOMO_stats.txt KLD_HOMO_ENRIETTII_stats.txt ECDF_pseudo

Create the table of statistics for KLD logos of clade ENRIETTII vs HOMO using the pvalue-calculation-method ECDF (Monte Carlo method terminating after M = 10 exceedances) with maximum permutation number = 10000. The running time on a Linux compute node with 20 cores at 2301 MHz and 120 GB RAM was ~4.86 hrs. The outputs are two text files: KLD_ENRIETTII_HOMO_stats.txt and KLD_HOMO_ENRIETTII_stats.txt

mkdir ECDF
tsfm --kldperms 10000 -m ECDF -c tRNA_L_skel_Leish.sites74.struct.cove --clade HOMO HOMO/HOMO MAJOR/MAJOR
mv KLD_ENRIETTII_HOMO_stats.txt KLD_HOMO_ENRIETTII_stats.txt ECDF

Create the figure using the KLD tables for ENRIETTII against HOMO from three folders GPD, ECDF and ECDF_pseudo

library(latex2exp)
library(ggplot2)
library(ggpubr)
#setwd("PATH/TO/WHERE/THE/FOLDERS/GPD/ECDF/ECDF_pseudo/ARE/LOCATED") # make sure to set your working directory to where the input data folders GPD, ECDF and ECDF_pseudo are located.
signTable0 <- read.table("ECDF_pseudo/KLD_ENRIETTII_HOMO_stats.txt", header = TRUE, sep = "\t")
signTable1 <- read.table("ECDF/KLD_ENRIETTII_HOMO_stats.txt", header = TRUE, sep = "\t")
signTable2 <- read.table("GPD/KLD_ENRIETTII_HOMO_stats.txt", header = TRUE, sep = "\t")
signTable0 <- signTable0[signTable0$Sample.Sz.Back != 0 & signTable0$Sample.Sz.Fore != 0 & signTable0$Statistic != 0,]
signTable0$method <- "ECDF-with-pseudo"
signTable1 <- signTable1[signTable1$Sample.Sz.Back != 0 & signTable1$Sample.Sz.Fore != 0 & signTable1$Statistic != 0,]
signTable1$method <- "ECDF"
signTable2 <- signTable2[signTable2$Sample.Sz.Back != 0 & signTable2$Sample.Sz.Fore != 0 & signTable2$Statistic != 0,]
signTable2$method <- "GPD with Initial-Target-Permnum = 500"
signTable0$P.Val.Method <- "p_ecdf_with_pseudo" 
common_cols <- intersect(colnames(signTable0), colnames(signTable1))
bindeddf <- rbind(
  subset(signTable0, select = common_cols), 
  subset(signTable1, select = common_cols),
  subset(signTable2, select = common_cols)
)
bindeddf$coordstate <- paste(bindeddf$Coord,bindeddf$State,sep = "")
bindeddf <- bindeddf[order(bindeddf$coordstate),]
bindeddf$method <- factor(bindeddf$method,levels = c("ECDF-with-pseudo","ECDF","GPD with Initial-Target-Permnum = 500"))
bindeddf$harmonicmean <- 0
for (j in 1:nrow(bindeddf)) {
  bindeddf$harmonicmean[j] = 1 / mean(1 / c(bindeddf$Sample.Sz.Back[j], bindeddf$Sample.Sz.Fore[j]))
}
spetralc <-c("#D53E4F" ,"#F46D43" ,"#FDAE61" , "#66C2A5" ,"#3288BD","#313695")
breaksarray <- c(1,2,4,10,30,80,200,500)
legendbreaks <- logb(breaksarray, base = 2)
legendlables <- as.character(breaksarray)
p <- ggplot(data = bindeddf, aes( x = method ,  y =  jitter(-log(P.value, base = 2),factor = 80), group = coordstate )) +
  geom_line(aes(color = logb(harmonicmean, base = 2)), size = 0.5) +
  geom_point(aes(color = logb(harmonicmean, base = 2),shape=factor(P.Val.Method)), size = 2) +
  scale_x_discrete(position = "top") + 
  scale_colour_gradientn(  colours = spetralc, breaks = legendbreaks, labels = legendlables, guide = "colourbar", limits = c(0, 9.2) ) + 
  theme( legend.key.height = unit(0.7, 'in'), plot.title = element_text(hjust = 0.5), text = element_text(size = 24,  family = "serif")) + 
  scale_shape_manual(  values = c(2,3,4,1),  breaks = c( "p_ecdf", "p_ecdf_with_pseudo",  "p_ecdf_with_pseudo (p_gpd=0)", "p_gpd"),
                       labels = c( "pecdf", "pecdf with pseudo", "pecdf with pseudo (pgpd=0)", "pgpd" ))+
  labs(title = "" , colour = "Sample Size",shape="Pmethod", size = "Permutation number") +
  xlab("") + ylab(TeX("$Surprisal (-log_2(p))$"))
setEPS()
postscript("KLD_ENRIETTII_Slopegraph_GPDvsECDF.eps", width = 18, height = 10,fonts=c("serif", "Palatino"))
print(p)
dev.off()

Name		Name	Last commit message	Last commit date
Latest commit History 403 Commits
Kelly2020_data		Kelly2020_data
docs		docs
src		src
tests		tests
tsfm		tsfm
.gitignore		.gitignore
.travis.yml		.travis.yml
LICENSE		LICENSE
MANIFEST.in		MANIFEST.in
README.md		README.md
README.rst		README.rst
requirements.txt		requirements.txt
setup.py		setup.py

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