InterPro domain: IPR004231

In molecular biology, the carboxypeptidase A inhibitor family is a family of proteins which is represented by the well-characterised metallocarboxypeptidase A inhibitor (MCPI) from potatoes, which belongs to the MEROPS inhibitor family I37, clan IE. It inhibits metallopeptidases belonging to MEROPS peptidase family M14, carboxypeptidase A.

Proteins with this domain include metallocarboxypeptidase inhibitor (MCPI) and fruit-specific protein. MCPI may play a defensive role against insect attacks [ 1 ].

1. Regulation of metallocarboxypeptidase inhibitor gene expression in tomato. Mol. Gen. Genet. 228, 281-6