Cited by 3,984Protein Structure and DynamicsEnzyme Structure and FunctionGenomics and Phylogenetic Studies

Protein Structure Comparison by Alignment of Distance Matrices

Holm, Liisa, Sander, Chris·1993·Journal of Molecular Biology

Abstract

With a rapidly growing pool of known tertiary structures, the importance of protein structure comparison parallels that of sequence alignment. We have developed a novel algorithm (DALI) for optimal pairwise alignment of protein structures. The three-dimensional co-ordinates of each protein are used to calculate residue-residue (C alpha-C alpha) distance matrices. The distance matrices are first decomposed into elementary contact patterns, e.g. hexapeptide-hexapeptide submatrices. Then, similar contact patterns in the two matrices are paired and combined into larger consistent sets of pairs. A Monte Carlo procedure is used to optimize a similarity score defined in terms of equivalent intramolecular distances. Several alignments are optimized in parallel, leading to simultaneous detection of the best, second-best and so on solutions. The method allows sequence gaps of any length, reversal of chain direction and free topological connectivity of aligned segments. Sequential connectivity can be imposed as an option. The method is fully automatic and identifies structural resemblances and common structural cores accurately and sensitively, even in the presence of geometrical distortions. An all-against-all alignment of over 200 representative protein structures results in an objective classification of known three-dimensional folds in agreement with visual classifications. Unexpected topological similarities of biological interest have been detected, e.g. between the bacterial toxin colicin A and globins, and between the eukaryotic POU-specific DNA-binding domain and the bacterial lambda repressor.

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Crossref · 10.1006/jmbi.1993.1489

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Authors
Holm, L., & Sander, C.
Affiliations
European Molecular Biology Laboratory (DE)
Venue
Journal of Molecular Biology
Publisher
Elsevier BV
Published
1993-09
Volume
233
Issue
1
Pages
123-138
ISSN
0022-2836 (ISSN-L)
OpenAlex
W2022058405
Cited by
3,984
References
0
Citations by year
2026: 23 · 2025: 31 · 2024: 22 · 2023: 22 · 2022: 28 · 2021: 27 · 2020: 53 · 2019: 50 · 2018: 45 · 2017: 42 · 2016: 53 · 2015: 65 · 2014: 73 · 2013: 106 · 2012: 98
FWCI
15.32
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Molecular Biology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
  • Physical Sciences › Materials Science › Materials Chemistry › Enzyme Structure and Function
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Phylogenetic Studies
Keywords
protein structure comparison, Dali, Monte Carlo optimization, structural similarity, protein fold classification, structural core, colicin A, globin, lambda repressor, sequence gaps
MeSH terms
Actins, Algorithms, Amino Acid Sequence, Colicins, DNA-Binding Proteins, Globins, Heat-Shock Proteins, Hexokinase, Models, Molecular, Molecular Sequence Data, Monte Carlo Method, Muramidase, Software, Reproducibility of Results, Cluster Analysis, Sequence Alignment, Sequence Homology, Amino Acid, Protein Structure, Secondary, Protein Structure, Tertiary

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