id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	blockedby	blocking	notify_on_close	platform	project
17614	DSSP in ChimeraX	r.joosten@…	Eric Pettersen	"{{{
Dear ChimeraX developers,

As the current developers of DSSP we would like you to consider adding (support for) the latest DSSP version in ChimeraX. The current version detects PPII-helices (also known as kappa-helices) and has elaborate native mmCIF support. It now directly annotates coordinate files in mmCIF with all the DSSP output. That is, a separate DSSP file is no longer needed. That said, the latest DSSP version can still read PDB files and create legacy DSSP formatted files. A description of the new DSSP is available as preprint on https://www.biorxiv.org/content/10.1101/2025.04.11.648460v1

The DSSP functionality is available as a C++ library under a BSD license (https://github.com/PDB-REDO/dssp) and we are happy to help you integrate it if you are interested.
To help reading DSSP-annotated mmCIF files we have a mmCIF dictionary at https://pdb-redo.eu/dssp/dssp-extension.dic. We are happy to help you with that as well of course.

We are very much interested in collaborating on DSSP integration as we think this would benefit both your and our users.

Best wishes,
Robbie Joosten

Department of biochemistry
Netherlands Cancer Institute


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"	enhancement	accepted	normal		Structure Analysis				Elaine Meng chimerax-programmers				all	ChimeraX