How to use the MEROPS database and website to help understand peptidase specificity.

Area of Science:

• Biochemistry
• Bioinformatics
• Enzymology

Background:

• The MEROPS database, established in 1996, provides a comprehensive classification and nomenclature for proteolytic enzymes and protein inhibitors.
• It organizes enzymes and inhibitors into families and clans based on biochemical properties and sequence homology, reflecting evolutionary relationships.

Purpose of the Study:

• To present recommendations for analyzing MEROPS database data.
• To demonstrate analyses of peptidase binding site preferences and exclusions.
• To identify peptidases exhibiting co-operative binding between adjacent sites.

Main Methods:

• Utilizing the MEROPS database, which includes classifications, sequence homologs, bibliographies, substrate cleavage sites, and phylogenetic trees.
• Analyzing substrate cleavage data from literature, encompassing physiological, pathological, and nonphysiological cleavages.
• Performing analyses to identify binding site preferences, exclusions, and co-operative binding in peptidases.

Main Results:

• Recommendations for effective analysis of MEROPS data are provided.
• Analyses reveal specific peptidase binding site preferences and exclusions.
• Co-operative binding between adjacent binding sites in certain peptidases has been identified.

Conclusions:

• The MEROPS database is a valuable resource for studying proteolytic enzymes and their inhibitors.
• Data analysis within MEROPS can elucidate enzyme-substrate interactions and binding mechanisms.
• Understanding binding site preferences and co-operative binding enhances knowledge of enzyme function and regulation.