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Self-compartmentalizing proteases

A Lupas¹, J M Flanagan, T Tamura

¹Smithkline Beecham Pharmaceuticals, Collegeville, PA 19426-0989, USA. lupasa00@mh.us.sbphrd.com

Trends in Biochemical Sciences

|November 14, 1997

Summary

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A small group of proteases form self-assembled compartments, acting as key intracellular protein breakdown agents. These proteases share a barrel-shaped structure and often partner with ATPases for regulated access.

Area of Science:

Molecular Biology
Biochemistry
Structural Biology

Background:

Most characterized proteases are monomeric or dimeric.
A distinct class of proteases self-assemble into compartments.
These compartmental proteases are crucial for intracellular protein degradation.

Purpose of the Study:

To highlight the unique structural and functional characteristics of self-compartmentalizing proteases.
To explore the relationship between these proteases and associated ATPases.
To understand their convergent evolution towards a barrel-shaped architecture.

Main Methods:

Comparative analysis of protease structures.
Investigation of protease-ATPase interactions.
Bioinformatic analysis of evolutionary origins.

Related Experiment Videos

Main Results:

Identified a small group of proteases forming internal compartments via self-association.
These proteases utilize a conserved barrel-shaped architecture.
Demonstrated frequent coupling with chaperone-like ATPases that regulate compartment access.

Conclusions:

Self-compartmentalizing proteases are major intracellular protein breakdown machinery.
Convergent evolution has led to a shared barrel-shaped structure across different protease families.
Associated ATPases, likely from the P-loop NTPase family, regulate protease activity and access.