A family of putative fimbrillin proteins found by clustering human gut metagenomic sequences [1]. Analysis of structural comparisons shows this family to be part of the FimbA (CL0450) superfamily of adhesin components or fimbrillins.

1: Expansion of the protein repertoire in newly explored environments: human gut microbiome specific protein families Ellrott K, Jaroszewski L, Weizhong L, Wooley J, Godzik, A PLoS Computational Biology, 2010 PMID:20532204