This domain is a chain that forms part of the integron cassette protein VCH_CASS14 present in Vibrio cholerae. In each monomer lies a deep binding pocket for small molecule substrates formed by helices alpha-1 and alpha-2 and residues from the central four strands of the beta-sheet. The pocket is extensively lined with hydrophobic side chains [1].

1: Integron gene cassettes: a repository of novel protein folds with distinct interaction sites. Sureshan V, Deshpande CN, Boucher Y, Koenig JE, Stokes HW, Harrop SJ, Curmi PM, Mabbutt BC; PLoS One. 2013;8:e52934. PMID:23349695