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Related Experiment Video

Updated: Jun 26, 2026

Investigating Protein Sequence-structure-dynamics Relationships with Bio3D-web

Investigating Protein Sequence-structure-dynamics Relationships with Bio3D-web

Published on: July 16, 2017

Insights into a putative hinge region in elastin using molecular dynamics simulations.

Jhonsen Djajamuliadi¹, Todd F Kagawa, Kosuke Ohgo

¹Department of Chemistry, University of Hawaii, 2545 McCarthy Mall, Honolulu, HI 96822, USA.

Matrix Biology : Journal of the International Society for Matrix Biology

|January 13, 2009

Summary

Molecular dynamics simulations reveal the alanine-rich crosslinking regions of elastin, specifically the exon 21/23 domain, can fluctuate between open and closed states, offering new insights into tissue elasticity.

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Last Updated: Jun 26, 2026

Investigating Protein Sequence-structure-dynamics Relationships with Bio3D-web

Investigating Protein Sequence-structure-dynamics Relationships with Bio3D-web

Published on: July 16, 2017

Area of Science:

Biochemistry
Structural Biology
Biophysics

Background:

Elastin provides vertebrate tissue resiliency and elasticity due to its crosslinked structure and hydrophobic regions.
The alanine-rich crosslinking regions of elastin are crucial for its function but are under-discussed in scientific literature.
The exon 21/23 (EX21/23) domain is a conserved human elastin splice form strategically positioned for tissue elongation and contraction.

Purpose of the Study:

To investigate the structure and dynamics of the elastin EX21/23 domain using molecular dynamics (MD) simulations.
To explore the potential conformational flexibility and distinct structural features of this crosslinking region.

Main Methods:

Homology modeling was used to generate initial structures for the hinge region of the EX21/23 domain.
Extensive molecular dynamics (MD) calculations were performed to simulate the behavior of the EX21/23 domain.

Main Results:

MD simulations provide insights into the dynamic fluctuations of the EX21/23 domain between 'open' and 'closed' states.
Distinct structural characteristics of the 'closed' state were identified, suggesting specific functional roles.
The findings challenge previous assumptions about a fixed alpha-helical architecture in the hinge region.

Conclusions:

The EX21/23 domain exhibits conformational flexibility, potentially enabling reversible tissue mechanics.
Understanding these dynamics enhances the comprehension of structure-function relationships in elastin and elastic fibers.
This study contributes to the knowledge of elastin's role in tissue elasticity and biomechanics.