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Table. 2.

Table. 2.

The categories and functions of the domains in typical collagenolytic proteases.

Domain Function
CD It is responsible for the enzymatic activity of the collagenase and contains the active site where the cleavage of collagen molecules occurs [19].
CBD It facilitates the binding of the enzyme to collagen substrates, enhancing the efficiency of collagen degradation by bringing the enzyme into close proximity to its target [19].
PKD/PPC PKD and PPC domains belong to Immunoglobulin-like (Ig-like) beta-sandwich protein. These domains can swell insoluble collagen and release collagen fiber, which is more easily degraded by collagenases [20].
AD It mediates the initial recognition of soluble collagen and unwinds collagen locally, transiently, and reversibly [91].
PA It has collagen-binding ability [92].
βJR It is referred to as the 'P-domain' and is essential for cleaving the N-terminal pro-domain [21]. It participates in enzyme folding and stability, collagen binding, and collagenolytic activity [17]. It is required for the hyperthermostability of protease [17, 73].
P P-proprotein convertase domain is necessary to keep the protease structure stable [20].
J. Microbiol. Biotechnol. 2024;34:1385~1394 https://doi.org/10.4014/jmb.2404.04051
© J. Microbiol. Biotechnol.