2WYC:
reference: The quorum-quenching N-acyl homoserine lactone acylase PvdQ is an Ntn-hydrolase with an unusual substrate-binding pocket., Bokhove M, Jimenez PN, Quax WJ, Dijkstra BW, Proc Natl Acad Sci U S A. 2010 Jan 12;107(2):686-91. Epub 2009 Dec 22. PMID: 20080736

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).