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Related Experiment Video

Updated: May 29, 2026

Hybrid-Cut: An Improved Sectioning Method for Recalcitrant Plant Tissue Samples

Hybrid-Cut: An Improved Sectioning Method for Recalcitrant Plant Tissue Samples

Published on: November 23, 2016

A structural study of Hypocrea jecorina Cel5A.

Toni M Lee¹, Mary F Farrow, Frances H Arnold

¹Biochemistry and Molecular Biophysics Option, California Institute of Technology, Pasadena, California 91125, USA.

Protein Science : a Publication of the Protein Society

|September 8, 2011

Summary

Researchers determined the crystal structure of endoglucanase Cel5A from Hypocrea jecorina, a key enzyme in biofuel production. This structural insight may help improve enzyme stability for more cost-effective lignocellulosic biofuel generation.

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Published on: February 3, 2017

Area of Science:

Biochemistry
Biotechnology
Structural Biology

Background:

Lignocellulosic biofuels are crucial for sustainable energy due to fossil fuel depletion.
High production costs of cellulases, enzymes for breaking down cellulose, impede economical biofuel viability.
Endoglucanases are key hydrolytic enzymes in this process.

Purpose of the Study:

To determine the crystal structure of Cel5A from Hypocrea jecorina.
To provide structural insights for improving enzyme stability and activity in industrial biofuel applications.

Main Methods:

X-ray crystallography was used to determine the three-dimensional structure of H. jecorina Cel5A.
Comparative analysis was performed with homologous endoglucanase structures.

Main Results:

The crystal structure of H. jecorina Cel5A was elucidated, revealing a fold similar to its homolog from Thermoascus aurantiacus.
The active site features a hydrophobic substrate-binding groove and hydrogen bond networks around catalytic glutamates.
Significant differences in side-chain identity, loop regions, and disulfide bonds were observed compared to homologs.

Conclusions:

The determined structure offers valuable information for protein engineering efforts.
Understanding structural variations can guide strategies to enhance Cel5A stability for industrial biofuel production without compromising enzymatic function.