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Structural proteomics of an archaeon.

D Christendat¹, A Yee, A Dharamsi

¹Ontario Cancer Institute and Department of Medical Biophysics, University of Toronto 610 University Ave, Toronto, Ontario, Canada M5G 2M9.

Nature Structural Biology

|October 4, 2000

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Structural proteomics is feasible, with ~20% of Methanobacterium thermoautotrophicum proteins being suitable for structural studies. This approach aids in discovering protein functions and advancing functional genomics.

Area of Science:

Structural biology
Proteomics
Functional genomics

Background:

High-throughput structural studies are crucial for understanding protein function.
Methanobacterium thermoautotrophicum provides a model system for proteomic analysis.

Purpose of the Study:

To assess the feasibility of structural proteomics.
To identify accessible structural targets within a proteome.
To explore the role of structural information in functional genomics.

Main Methods:

Cloning, expression, and purification of 424 nonmembrane proteins from M. thermoautotrophicum.
Suitability assessment for X-ray crystallography and NMR spectroscopy.
Retrospective analysis of protein sequence and solubility.

Related Experiment Videos

Determination of 10 protein structures.

Biochemical validation of putative functions.

Main Results:

Approximately 20% of the tested proteins were suitable for structural analysis without optimization.
Identified correlations between protein sequence and solubility.
Discovered biochemical functions for several proteins that were not evident from sequence analysis alone.
Confirmed putative functions through biochemical assays.

Conclusions:

Structural proteomics is a viable strategy for large-scale protein structure determination.
Structural information can reveal protein functions missed by sequence analysis.
This approach is essential for advancing functional genomics and understanding biological systems.