Tags: Enzyme.
Helper-component proteinase (EC 3.4.22.45 HC-Pro) is an enzyme. This enzyme catalyses the following chemical reaction Hydrolyses a Gly-Gly bond at its own C-terminus commonly in the sequence -Tyr-Xaa-Val-Gly-Gly in the processing of the potyviral polyproteinThis enzyme is present in many potyviruses.