High-resolution crystal structures and STD NMR mapping of human ABO(H) blood group glycosyltransferases in complex with trisaccharide reaction products suggest a molecular basis for product release
High-resolution crystal structures and STD NMR mapping of human ABO(H) blood group glycosyltransferases in complex with trisaccharide reaction products suggest a molecular basis for product release
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与三糖反应产物复合的人 ABO(H) 血型糖基转移酶的高分辨率晶体结构和 STD NMR 图谱表明了产品释放的分子基础
DOI:
10.1093/glycob/cwx053
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发表时间:
2017
期刊:
影响因子:
4.3
通讯作者:
Peters
中科院分区:
文献类型:
--
作者:
Gagnon;Sindhuwinata;Schuman;Borisova;Palcic;Peters
The human ABO(H) blood group A- and B-synthesizing glycosyltransferases GTA and GTB have been structurally characterized to high resolution in complex with their respective trisaccharide antigen products. These findings are particularly timely and relevant given the dearth of glycosyltransferase structures collected in complex with their saccharide reaction products. GTA and GTB utilize the same acceptor substrates, oligosaccharides terminating with α-l-Fucp-(1→2)-β-d-Galp-OR (where R is a glycolipid or glycoprotein), but use distinct UDP donor sugars, UDP-N-acetylgalactosamine and UDP-galactose, to generate the blood group A (α-l-Fucp-(1→2)[α-d-GalNAcp-(1→3)]-β-d-Galp-OR) and blood group B (α-l-Fucp-(1→2)[α-d-Galp-(1→3)]-β-d-Galp-OR) determinant structures, respectively. Structures of GTA and GTB in complex with their respective trisaccharide products reveal a conflict between the transferred sugar monosaccharide and the β-phosphate of the UDP donor. Mapping of the binding epitopes by saturation transfer difference NMR measurements yielded data consistent with the X-ray structural results. Taken together these data suggest a mechanism of product release where monosaccharide transfer to the H-antigen acceptor induces active site disorder and ejection of the UDP leaving group prior to trisaccharide egress.
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影响因子:
15
作者:
SINNOTT, ML;JENCKS, WP
通讯作者:
JENCKS, WP
影响因子:
15
作者:
C. Bush;Zhenning Yan;B. Rao
通讯作者:
B. Rao
影响因子:
5.6
作者:
B. Schuman;M. Persson;R. Landry;R. Polakowski;J. Weadge;N. Seto;S. Borisova;M. Palcic;S. V. Evans
通讯作者:
S. V. Evans
影响因子:
1.1
作者:
LEMIEUX, RU;BOCK, K;RAO, VS
通讯作者:
RAO, VS
影响因子:
2.9
作者:
Ramakrishnan,Boopathy;Boeggeman,Elizabeth;Qasba,PradmanK
通讯作者:
Qasba,PradmanK