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pp1.go
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pp1.go
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// Copyright (c) 2021 The Emergent Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"fmt"
"github.com/emer/emergent/chem"
"github.com/emer/etable/etable"
"github.com/emer/etable/etensor"
)
// PP1Vars are intracellular Ca-driven signaling variables for the
// PP1 - I-1 system
type PP1Vars struct {
I1 float64 `desc:"dephosphorylated I-1 = I1_inactive"`
I1P float64 `desc:"phosphorylated (active) I-1 = I1_active"`
PP1_I1P float64 `desc:"PP1 = protein phosphatase 1 bound with I-1P"`
PP1act float64 `desc:"activated PP1"`
PKAI1C float64 `desc:"PKA+I1 complex for PKAI1 enzyme reaction"`
CaNI1PC float64 `desc:"CaN+I1P complex for CaNI1P enzyme reaction"`
PP2AI1PC float64 `desc:"PP2A+I1P complex for PP2AI1P enzyme reaction"`
}
func (ps *PP1Vars) Init(vol float64) {
ps.I1 = chem.CoToN(2, vol)
ps.I1P = 0
ps.PP1_I1P = chem.CoToN(2, vol)
ps.PP1act = 0
ps.PKAI1C = 0
ps.CaNI1PC = 0
ps.PP2AI1PC = 0
if TheOpts.InitBaseline {
// All vals below from 500 sec baseline
ps.I1 = chem.CoToN(0.8722, vol)
ps.I1P = chem.CoToN(1.131, vol)
ps.CaNI1PC = chem.CoToN(0.002632, vol)
}
}
func (ps *PP1Vars) InitCode(vol float64, pre string) {
fmt.Printf("\tps.%s.I1 = chem.CoToN(%.4g, vol)\n", pre, chem.CoFmN(ps.I1, vol))
fmt.Printf("\tps.%s.I1P = chem.CoToN(%.4g, vol)\n", pre, chem.CoFmN(ps.I1P, vol))
fmt.Printf("\tps.%s.PP1_I1P = chem.CoToN(%.4g, vol)\n", pre, chem.CoFmN(ps.PP1_I1P, vol))
fmt.Printf("\tps.%s.PP1act = chem.CoToN(%.4g, vol)\n", pre, chem.CoFmN(ps.PP1act, vol))
fmt.Printf("\tps.%s.CaNI1PC = chem.CoToN(%.4g, vol)\n", pre, chem.CoFmN(ps.CaNI1PC, vol))
fmt.Printf("\tps.%s.PP2AI1PC = chem.CoToN(%.4g, vol)\n", pre, chem.CoFmN(ps.PP2AI1PC, vol))
}
func (ps *PP1Vars) Zero() {
ps.I1 = 0
ps.I1P = 0
ps.PP1_I1P = 0
ps.PP1act = 0
ps.PKAI1C = 0
ps.CaNI1PC = 0
ps.PP2AI1PC = 0
}
func (ps *PP1Vars) Integrate(d *PP1Vars) {
chem.Integrate(&ps.I1, d.I1)
chem.Integrate(&ps.I1P, d.I1P)
chem.Integrate(&ps.PP1_I1P, d.PP1_I1P)
chem.Integrate(&ps.PP1act, d.PP1act)
chem.Integrate(&ps.PKAI1C, d.PKAI1C)
chem.Integrate(&ps.CaNI1PC, d.CaNI1PC)
chem.Integrate(&ps.PP2AI1PC, d.PP2AI1PC)
}
func (ps *PP1Vars) Log(dt *etable.Table, vol float64, row int, pre string) {
// dt.SetCellFloat(pre+"I1", row, chem.CoFmN(ps.I1, vol))
dt.SetCellFloat(pre+"I1P", row, chem.CoFmN(ps.I1P, vol))
dt.SetCellFloat(pre+"PP1act", row, chem.CoFmN(ps.PP1act, vol))
}
func (ps *PP1Vars) ConfigLog(sch *etable.Schema, pre string) {
// *sch = append(*sch, etable.Column{pre + "I1", etensor.FLOAT64, nil, nil})
*sch = append(*sch, etable.Column{pre + "I1P", etensor.FLOAT64, nil, nil})
*sch = append(*sch, etable.Column{pre + "PP1act", etensor.FLOAT64, nil, nil})
}
// PP1State is overall intracellular Ca-driven signaling states
// for PP1-I-1 in Cyt and PSD
// 14 state vars total
type PP1State struct {
Cyt PP1Vars `desc:"in cytosol -- volume = 0.08 fl"`
PSD PP1Vars `desc:"in PSD -- volume = 0.02 fl"`
}
func (ps *PP1State) Init() {
ps.Cyt.Init(CytVol)
ps.PSD.Init(PSDVol)
if TheOpts.InitBaseline {
vol := float64(CytVol)
ps.Cyt.PP1_I1P = chem.CoToN(0.9909, vol)
ps.Cyt.PP1act = chem.CoToN(0.008759, vol)
ps.Cyt.PP2AI1PC = chem.CoToN(0.008215, vol)
vol = PSDVol
ps.PSD.PP1_I1P = chem.CoToN(5.949, vol)
ps.PSD.PP1act = chem.CoToN(0.05258, vol)
ps.PSD.PP2AI1PC = chem.CoToN(0, vol)
}
}
func (ps *PP1State) InitCode() {
fmt.Printf("\nPP1State:\n")
ps.Cyt.InitCode(CytVol, "Cyt")
ps.PSD.InitCode(PSDVol, "PSD")
}
func (ps *PP1State) Zero() {
ps.Cyt.Zero()
ps.PSD.Zero()
}
func (ps *PP1State) Integrate(d *PP1State) {
ps.Cyt.Integrate(&d.Cyt)
ps.PSD.Integrate(&d.PSD)
}
func (ps *PP1State) Log(dt *etable.Table, row int) {
ps.Cyt.Log(dt, CytVol, row, "Cyt_")
ps.PSD.Log(dt, PSDVol, row, "PSD_")
}
func (ps *PP1State) ConfigLog(sch *etable.Schema) {
ps.Cyt.ConfigLog(sch, "Cyt_")
ps.PSD.ConfigLog(sch, "PSD_")
}
// PP1Params are the parameters governing the PP1-I-1 binding
type PP1Params struct {
I1PP1 chem.React `desc:"1: I-1P + PP1act -> PP1-I1P -- Table SIi constants are backward = I1-PP1"`
PKAI1 chem.Enz `desc:"2: I-1P phosphorylated by PKA -- Table SIj numbers != Figure SI4"`
CaNI1P chem.Enz `desc:"3: I-1P dephosphorylated by CaN -- Table SIj number"`
PP2aI1P chem.Enz `desc:"4: I-1P dephosphorylated by PP2A -- Table SIj number"`
I1Diffuse chem.Diffuse `desc:"I1 diffusion between Cyt and PSD"`
PP1Diffuse chem.Diffuse `desc:"PP1 diffusion between Cyt and PSD"`
}
func (cp *PP1Params) Defaults() {
// note: following are all in Cyt -- PSD is 4x for first values
cp.I1PP1.SetVol(100, CytVol, 1) // Kb = 100 μM-1 = 2.0834 -- reversed for product = PP1-I1P
cp.PKAI1.SetKmVol(8.1, CytVol, 21.2, 5.3) // Km = 8.1 μM-1 k1 = 0.068157
cp.CaNI1P.SetKmVol(3, CytVol, 11.2, 2.8) // Km = 3 μM-1 = 0.097222
cp.PP2aI1P.SetKmVol(3, CytVol, 11.2, 2.8) // Km = 3 μM-1 = 0.097222
cp.I1Diffuse.SetSym(35.9 / 0.0225)
cp.PP1Diffuse.Set(31.4/0.0225, 5.23/0.0225)
}
// StepPP1 does the bulk of Ca + PP1 + CaM binding reactions, in a given region
// cCaM, nCaM = current, new 3CaCaM from CaMKIIVars
// cCa, nCa = current new Ca
func (cp *PP1Params) StepPP1(vol float64, c, d *PP1Vars, pka, can, pp2a float64, dpka, dcan, dpp2a *float64) {
kf := CytVol / vol
cp.I1PP1.StepK(kf, c.I1P, c.PP1act, c.PP1_I1P, &d.I1P, &d.PP1act, &d.PP1_I1P) // 1
// cs, ce, cc, cp -> ds, de, dc, dp
cp.PKAI1.StepK(kf, c.I1, pka, c.PKAI1C, c.I1P, &d.I1, dpka, &d.PKAI1C, &d.I1P) // 2
cp.CaNI1P.StepK(kf, c.I1P, can, c.CaNI1PC, c.I1, &d.I1P, dcan, &d.CaNI1PC, &d.I1) // 3
if dpp2a != nil { // no PP2A in PSD
cp.PP2aI1P.StepK(kf, c.I1P, pp2a, c.PP2AI1PC, c.I1, &d.I1P, dpp2a, &d.PP2AI1PC, &d.I1) // 3
}
}
// StepDiffuse does diffusion update, c=current, d=delta
func (cp *PP1Params) StepDiffuse(c, d *PP1State) {
cp.I1Diffuse.Step(c.Cyt.I1, c.PSD.I1, CytVol, PSDVol, &d.Cyt.I1, &d.PSD.I1)
cp.I1Diffuse.Step(c.Cyt.I1P, c.PSD.I1P, CytVol, PSDVol, &d.Cyt.I1P, &d.PSD.I1P)
cp.PP1Diffuse.Step(c.Cyt.PP1_I1P, c.PSD.PP1_I1P, CytVol, PSDVol, &d.Cyt.PP1_I1P, &d.PSD.PP1_I1P)
cp.PP1Diffuse.Step(c.Cyt.PP1act, c.PSD.PP1act, CytVol, PSDVol, &d.Cyt.PP1act, &d.PSD.PP1act)
}
// Step does full CaN updating, c=current, d=delta
func (cp *PP1Params) Step(c, d *PP1State, pka, dpka *PKAState, can, dcan *CaNState, pp2a float64, dpp2a *float64) {
cp.StepPP1(CytVol, &c.Cyt, &d.Cyt, pka.Cyt.PKAact, can.Cyt.CaNact, pp2a, &dpka.Cyt.PKAact, &dcan.Cyt.CaNact, dpp2a)
cp.StepPP1(PSDVol, &c.PSD, &d.PSD, pka.PSD.PKAact, can.PSD.CaNact, 0, &dpka.PSD.PKAact, &dcan.PSD.CaNact, nil)
cp.StepDiffuse(c, d)
}