Structure, substrate recognition and initiation of hyaluronan synthase.
Structure, substrate recognition and initiation of hyaluronan synthase.
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DOI:
10.1038/s41586-022-04534-2
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发表时间:
2022-04
期刊:
影响因子:
64.8
通讯作者:
中科院分区:
文献类型:
--
作者:
Hyaluronan (HA) is an acidic heteropolysaccharide of alternating N-acetylglucosamine and glucuronic acid sugars that is ubiquitously expressed in the vertebrate extracellular matrix. The high molecular weight polymer modulates essential physiological processes in health and disease, including cell differentiation, tissue homeostasis, and angiogenesis. HA is synthesized by a membrane-embedded processive glycosyltransferase, HAS, that catalyzes the synthesis and membrane translocation of HA from UDP-activated precursors. Here, we describe five cryo-electron microscopy structures of a viral HAS homolog at different states during substrate binding and initiation of polymer synthesis. Combined with biochemical analyses and molecular dynamics simulations, our data reveal how HAS selects its substrates, hydrolyzes the first substrate to prime the synthesis reaction, opens a HA-conducting transmembrane (TM) channel, ensures alternating substrate polymerization, and coordinates HA inside its TM pore. Our work suggests a detailed model for the formation of an acidic extracellular heteropolysaccharide and provides the first insights into the biosynthesis of one of the most abundant and essential glycosaminoglycans in the human body.
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影响因子:
64.8
作者:
Harris CR;Millman KJ;van der Walt SJ;Gommers R;Virtanen P;Cournapeau D;Wieser E;Taylor J;Berg S;Smith NJ;Kern R;Picus M;Hoyer S;van Kerkwijk MH;Brett M;Haldane A;Del Río JF;Wiebe M;Peterson P;Gérard-Marchant P;Sheppard K;Reddy T;Weckesser W;Abbasi H;Gohlke C;Oliphant TE
通讯作者:
Oliphant TE
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
影响因子:
4.3
作者:
Kelly, SJ;Taylor, KB;Jedrzejas, MJ
通讯作者:
Jedrzejas, MJ
DOI:
10.1107/s0907444909052925
发表时间:
2010-02
期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
--
作者:
Adams PD;Afonine PV;Bunkóczi G;Chen VB;Davis IW;Echols N;Headd JJ;Hung LW;Kapral GJ;Grosse-Kunstleve RW;McCoy AJ;Moriarty NW;Oeffner R;Read RJ;Richardson DC;Richardson JS;Terwilliger TC;Zwart PH
通讯作者:
Zwart PH
影响因子:
7.3
作者:
Cowman MK;Lee HG;Schwertfeger KL;McCarthy JB;Turley EA
通讯作者:
Turley EA