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Unit‐vector RMS (URMS) as a tool to analyze molecular dynamics trajectories
Author(s) -
Kedem Klara,
Chew L. Paul,
Elber Ron
Publication year - 1999
Publication title -
proteins: structure, function, and bioinformatics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.699
H-Index - 191
eISSN - 1097-0134
pISSN - 0887-3585
DOI - 10.1002/(sici)1097-0134(19991201)37:4<554::aid-prot6>3.0.co;2-1
Subject(s) - molecular dynamics , folding (dsp implementation) , crystallography , myoglobin , chain (unit) , dynamics (music) , chemistry , protein folding , substructure , globular protein , chemical physics , physics , biophysics , computational chemistry , biology , biochemistry , engineering , structural engineering , astronomy , acoustics , electrical engineering
The Unit‐vector RMS (URMS) is a new technique to compare protein chains and to detect similarities of chain segments. It is limited to comparison of C α chains. However, it has a number of unique features that include exceptionally weak dependence on the length of the chain and efficient detection of substructure similarities. Two molecular dynamics simulations of proteins in the neighborhood of their native states are used to test the performance of the URMS. The first simulation is of a solvated myoglobin and the second is of the protein MHC. In accord with previous studies the secondary structure elements (helices or sheets) are found to be moving relatively rigidly among flexible loops. In addition to these tests, folding trajectories of C peptides are analyzed, revealing a folding nucleus of seven amino acids. Proteins 1999;37:554–564. ©1999 Wiley‐Liss, Inc.