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Related Experiment Video

Updated: May 8, 2026

Self-assembly of Complex Two-dimensional Shapes from Single-stranded DNA Tiles

Self-assembly of Complex Two-dimensional Shapes from Single-stranded DNA Tiles

Published on: May 8, 2015

Structural templates for modeling homodimers.

Petras J Kundrotas¹, Ilya A Vakser, Joël Janin

¹Center for Bioinformatics, The University of Kansas, 2030 Becker Dr., Lawrence, Kansas, 66047.

Protein Science : a Publication of the Protein Society

|September 3, 2013

Summary

This summary is machine-generated.

Modeling protein oligomers is crucial as they are abundant in biology. A new template-based method accurately predicts homodimer structures using structural alignment, improving protein modeling accuracy.

Keywords:

protein modeling quaternary structure structural bioinformatics structure alignment

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Area of Science:

Protein structure modeling
Computational biology
Structural bioinformatics

Background:

Oligomeric proteins are vital for biological processes, yet modeling their assemblies is challenging.
Existing methods for modeling protein oligomers are limited, especially in the absence of experimental structures.

Purpose of the Study:

To develop and validate a novel template-based method for modeling homodimeric protein structures.
To assess the effectiveness of structural alignment for predicting oligomeric assemblies from protein sequences.

Main Methods:

A method based on structural alignment of subunits was developed to model homodimers.
The method was tested on 511 target structures using templates from homodimeric (H-set) and monomeric (M-set) proteins in the Protein Data Bank.

Main Results:

The method identified a H-set template for 97% of targets, correctly modeling dimer geometry and contacts in 50% of cases.
M-set templates were also identified, with some crystal dimers closely resembling target homodimers.
The procedure detected homology at low sequence identities and identified potential errors in existing quaternary structure databases.

Conclusions:

Template-based methods, utilizing structural alignment, are highly effective for modeling homodimeric proteins.
The Protein Data Bank's structural diversity supports the broad applicability of template-based modeling for protein assemblies.
This approach offers a reliable strategy for modeling both oligomeric and monomeric proteins.