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Alpha-2-macroglobulin

UniProtKB accession:  P76578
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Go to UniProtKB:  P76578
UniProtKB description:  Protects the bacterial cell from host peptidases (PubMed:18697741, PubMed:26100869, PubMed:26143919). Acts by a 'trapping' mechanism. Cleavage of the bait-region domain by host peptidases leads to a global conformational change, which results in entrapment of the host peptidase and activation of the thioester bond that covalently binds the attacking host peptidase (PubMed:26100869, PubMed:26143919). Trapped peptidases are still active except against very large substrates (PubMed:26100869). May protect the entire periplam, including the lipoproteins anchored to the periplasmic side of the outer membrane, against intruding endopeptidases (PubMed:26100869).
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