Stability, catalytic versatility and evolution of the (beta alpha)(8)-barrel fold

Area of Science:

• Protein structure and function
• Enzymology
• Structural biology

Background:

• The (beta alpha)(8)-barrel is a common protein fold in enzymes.
• This fold serves as a model for understanding protein stability.
• It's also used in protein engineering to alter enzyme activity.

Purpose of the Study:

• To highlight the versatility of the (beta alpha)(8)-barrel fold.
• To discuss its application in studying protein thermostability.
• To introduce the (beta alpha)(4)-half-barrel as a potential subdomain.

Main Methods:

• Literature review of studies on (beta alpha)(8)-barrel proteins.
• Analysis of structural data related to protein folds.
• Identification and characterization of the (beta alpha)(4)-half-barrel structure.

Main Results:

• The (beta alpha)(8)-barrel fold is prevalent in numerous enzymes.
• This fold is instrumental in research on protein thermostability.
• A (beta alpha)(4)-half-barrel subdomain has been recently identified.

Conclusions:

• The (beta alpha)(8)-barrel is a highly adaptable protein structure.
• Its utility extends to understanding protein stability and engineering enzyme properties.
• The (beta alpha)(4)-half-barrel represents a novel structural element within this fold.