PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 25236239-1 2015 A mutant derived from a cyclodextrin glucantransferase with an alanine residue as its acid/base catalyst residue (CGT-E284A) catalyzed regioselective glycosylation at 3-OH of l-ascorbic acid using alpha-maltosyl fluoride (alphaG2F) and l-ascorbic acid as the donor and acceptor, respectively, yielding 3-O-alpha-maltosyl-l-ascorbate (AA3alphaG2). Alanine 63-70 UDP glycosyltransferase 8 Homo sapiens 114-117 24274477-2 2014 In this paper, we describe another example, wherein a cyclodextrin glucanotransferase mutant (CGT-E284A) with an alanine residue at its general acid/base catalyst position (Glu284), was constructed. Alanine 113-120 UDP glycosyltransferase 8 Homo sapiens 94-97 24274477-5 2014 Through a thin-layer chromatography-based screening process, two mutants were identified; (1) a mutant with a glycine residue at Glu284 (CGT-E284G) exhibiting improved transglycosylation activity compared with the original alanine mutant and (2) a mutant with a serine residue with residual hydrolytic activity. Alanine 223-230 UDP glycosyltransferase 8 Homo sapiens 137-140