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[[Image:1fo8.gif|left|200px]]
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{{STRUCTURE_1fo8|  PDB=1fo8  |  SCENE=  }}
'''CRYSTAL STRUCTURE OF N-ACETYLGLUCOSAMINYLTRANSFERASE I'''


==CRYSTAL STRUCTURE OF N-ACETYLGLUCOSAMINYLTRANSFERASE I==
<StructureSection load='1fo8' size='340' side='right'caption='[[1fo8]], [[Resolution|resolution]] 1.40&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1fo8]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Oryctolagus_cuniculus Oryctolagus cuniculus]. 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='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.4&#8491;</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='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1fo8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1fo8 OCA], [https://pdbe.org/1fo8 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1fo8 RCSB], [https://www.ebi.ac.uk/pdbsum/1fo8 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1fo8 ProSAT]</span></td></tr>
</table>
== Function ==
[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.
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/fo/1fo8_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1fo8 ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== 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.


==Overview==
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>
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.


==About this Structure==
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
1FO8 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Oryctolagus_cuniculus Oryctolagus cuniculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FO8 OCA].
</div>
<div class="pdbe-citations 1fo8" style="background-color:#fffaf0;"></div>


==Reference==
==See Also==
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:[http://www.ncbi.nlm.nih.gov/pubmed/11032794 11032794]
*[[O-GlcNAc transferase 3D structures|O-GlcNAc transferase 3D structures]]
[[Category: Alpha-1,3-mannosyl-glycoprotein 2-beta-N-acetylglucosaminyltransferase]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Oryctolagus cuniculus]]
[[Category: Oryctolagus cuniculus]]
[[Category: Single protein]]
[[Category: Rini JM]]
[[Category: Rini, J M.]]
[[Category: Sarkar M]]
[[Category: Sarkar, M.]]
[[Category: Schachter H]]
[[Category: Schachter, H.]]
[[Category: Unligil UM]]
[[Category: Unligil, U M.]]
[[Category: Yuwaraj S]]
[[Category: Yuwaraj, S.]]
[[Category: Zhou S]]
[[Category: Zhou, S.]]
[[Category: Alpha-1,3-mannosyl-glycoprotein beta-1,2-n-acetylglucosaminyltransferase]]
[[Category: Methylmercury derivative]]
[[Category: N-acetylglucosaminyltransferase i]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May  2 16:34:02 2008''
Retrieved from "https://proteopedia.org/1fo8"