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An aminopeptidase P from Lactococcus lactis with original specificity

Biochimica et Biophysica Acta (BBA) - General Subjects, ISSN: 0304-4165, Vol: 1243, Issue: 2, Page: 209-215
1995
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Article Description

An aminopeptidase P (E.C. 3.4.11.9) that cleaves the Arg-1-Pro-2 bond of bradykinin has been isolated for the first time from Lactococcus lactis. The peptidase was purified to homogeneity in a 3-step procedure and characterized. It is a monomeric metalloenzyme with a 43 kDa molecular mass, activated by Mn 2+ and inhibited by DTT. It differs from the majority of aminopeptidases P already described by displaying a specificity for X-Pro-Pro N-termini and probably an extended binding site that could accommodate amino acid residues beyond the P′2 position of the substrate.

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