1fo8

<table><tr><td colspan='2'>[[1fo8]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FO8 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1FO8 FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MMC:METHYL+MERCURY+ION'>MMC</scene></td></tr>

<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1fo9|1fo9]], [[1foa|1foa]]</div></td></tr>

<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Alpha-1,3-mannosyl-glycoprotein_2-beta-N-acetylglucosaminyltransferase Alpha-1,3-mannosyl-glycoprotein 2-beta-N-acetylglucosaminyltransferase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.4.1.101 2.4.1.101] </span></td></tr>

[[https://www.uniprot.org/uniprot/MGAT1_RABIT MGAT1_RABIT]] Initiates complex N-linked carbohydrate formation. Essential for the conversion of high-mannose to hybrid and complex N-glycans.

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== Publication Abstract from PubMed ==

N:-acetylglucosaminyltransferase I (GnT I) serves as the gateway from oligomannose to hybrid and complex N:-glycans and plays a critical role in mammalian development and possibly all metazoans. We have determined the X-ray crystal structure of the catalytic fragment of GnT I in the absence and presence of bound UDP-GlcNAc/Mn(2+) at 1.5 and 1.8 A resolution, respectively. The structures identify residues critical for substrate binding and catalysis and provide evidence for similarity, at the mechanistic level, to the deglycosylation step of retaining beta-glycosidases. The structuring of a 13 residue loop, resulting from UDP-GlcNAc/Mn(2+) binding, provides an explanation for the ordered sequential 'Bi Bi' kinetics shown by GnT I. Analysis reveals a domain shared with Bacillus subtilis glycosyltransferase SpsA, bovine beta-1,4-galactosyl transferase 1 and Escherichia coli N:-acetylglucosamine-1-phosphate uridyltransferase. The low sequence identity, conserved fold and related functional features shown by this domain define a superfamily whose members probably share a common ancestor. Sequence analysis and protein threading show that the domain is represented in proteins from several glycosyltransferase families.

X-ray crystal structure of rabbit N-acetylglucosaminyltransferase I: catalytic mechanism and a new protein superfamily.,Unligil UM, Zhou S, Yuwaraj S, Sarkar M, Schachter H, Rini JM EMBO J. 2000 Oct 16;19(20):5269-80. PMID:11032794<ref>PMID:11032794</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

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<div class="pdbe-citations 1fo8" style="background-color:#fffaf0;"></div>

== References ==

<references/>

[[Category: Alpha-1,3-mannosyl-glycoprotein 2-beta-N-acetylglucosaminyltransferase]]

[[Category: Rini, J M]]

[[Category: Sarkar, M]]

[[Category: Schachter, H]]

[[Category: Unligil, U M]]

[[Category: Yuwaraj, S]]

[[Category: Zhou, S]]

[[Category: Transferase]]