4gk9

Publication Abstract from PubMed

Burkholderia oklahomensis EO147 agglutinin (BOA) is a 29 kDa member of the Oscillatoria agardhii agglutinin (OAA) family of lectins. Members of the OAA family recognize high-mannose glycans, and, by binding to the HIV envelope glycoprotein 120 (gp120), block the virus from binding to and entering the host cell, thereby inhibiting infection. OAA-family lectins comprise either one or two homologous domains, with a single domain possessing two glycan binding sites. We solved the structure of BOA in the ligand-free form as well as in complex with four molecules of 3alpha,6alpha-mannopentaose, the core unit of the N-linked high-mannose structures found on gp120 in vivo. This is the first structure of a double-domain OAA-family lectin in which all four binding sites are occupied by ligand. The structural details of the BOA-glycan interactions presented here, together with determination of affinity constants and HIV inactivation data, shed further light onto the structure-function relationship in this important class of anti-HIV proteins.

Burkholderia oklahomensis agglutinin is a canonical two-domain OAA-family lectin: structures, carbohydrate binding and anti-HIV activity.,Whitley MJ, Furey W, Kollipara S, Gronenborn AM FEBS J. 2013 May;280(9):2056-67. doi: 10.1111/febs.12229. Epub 2013 Apr 2. PMID:23480609^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.