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Support up to 2 character chain IDs for PDB files.#1175

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drroe merged 14 commits intoAmber-MD:masterfrom
drroe:large.chainid.changepdb
Mar 27, 2026
Merged

Support up to 2 character chain IDs for PDB files.#1175
drroe merged 14 commits intoAmber-MD:masterfrom
drroe:large.chainid.changepdb

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@drroe drroe commented Mar 27, 2026

V7.6.0. Related to #1171. Since hybrid36 is now supported, should also support writing extended (2 character) chain IDs for large PDB files. The pdbchain keyword can be used when writing PDBs to force cpptraj to adhere to the PDB V3 (single character chain ID) standard.

Note: the 2 character chain IDs are currently only supported for ATOM/HETATM records, not LINK or SSBOND.

Updates the manual for the pdbchain, hybrid36, and wrapnumbers keywords.

This will probably be the last commit (barring any needed bugfixes) before the AmberTools 26 release.

@drroe drroe self-assigned this Mar 27, 2026
@drroe drroe added enhancement New keywords New keywords for existing commands. labels Mar 27, 2026
@drroe drroe merged commit 14855c3 into Amber-MD:master Mar 27, 2026
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@drroe drroe deleted the large.chainid.changepdb branch March 27, 2026 16:00
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