The search yielded a highly significant (97% probability) hit to a profile HMM of Peptidase_M73 protein family (PF12389), which includes camelysin, a secreted metallo-endopeptidase ( 52 ), and TasA, a key component of bacterial biofilms ( 18 , 53 – 58 ).
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Archaeal bundling pili of <i>Pyrobaculum calidifontis</i> reveal similarities between archaeal and bacterial biofilms.
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