WsaF from Geobacillus stearothermophilus catalyses the formation of beta-1-2-linkage of rhamnose sugars in the carbohydrate polymer. It consists of two domains the N-terminal domain (represented in this entry), which binds the acceptor, and a C-terminal domain which which binds the substrate (dTDP-beta-l-rhamnose) [1].

1: Structural basis of substrate binding in WsaF, a rhamnosyltransferase from Geobacillus stearothermophilus. Steiner K, Hagelueken G, Messner P, Schaffer C, Naismith JH; J Mol Biol. 2010;397:436-447. PMID:20097205

2: The design and structural characterization of a synthetic pentatricopeptide repeat protein. Gully BS, Shah KR, Lee M, Shearston K, Smith NM, Sadowska A, Blythe AJ, Bernath-Levin K, Stanley WA, Small ID, Bond CS; Acta Crystallogr D Biol Crystallogr. 2015;71:196-208. PMID:25664731

3: Structural basis for specific single-stranded RNA recognition by designer pentatricopeptide repeat proteins. Shen C, Zhang D, Guan Z, Liu Y, Yang Z, Yang Y, Wang X, Wang Q, Zhang Q, Fan S, Zou T, Yin P; Nat Commun. 2016;7:11285. PMID:27088764