3bfp

<StructureSection load='3bfp' size='340' side='right' caption='[[3bfp]], [[Resolution|resolution]] 1.75&Aring;' scene=''>

<table><tr><td colspan='2'>[[3bfp]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/"campylobacter_fetus_subsp._jejuni"_smibert_1974 "campylobacter fetus subsp. jejuni" smibert 1974]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3BFP OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3BFP FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=FLC:CITRATE+ANION'>FLC</scene></td></tr>

<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2vhe|2vhe]]</td></tr>

<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">pglD ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=197 "Campylobacter fetus subsp. jejuni" Smibert 1974])</td></tr>

<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3bfp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3bfp OCA], [http://pdbe.org/3bfp PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3bfp RCSB], [http://www.ebi.ac.uk/pdbsum/3bfp PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3bfp ProSAT]</span></td></tr>

[[http://www.uniprot.org/uniprot/PGLD_CAMJE PGLD_CAMJE]] Acetyltransferase that modifies the UDP-4-amino-sugar to form UDP-N,N'-diacetylbacillosamine in the N-linked protein glycosylation pathway.<ref>PMID:17087520</ref> <ref>PMID:19448740</ref>

<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/bf/3bfp_consurf.spt"</scriptWhenChecked>

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== Publication Abstract from PubMed ==

Campylobacter jejuni is highly unusual among bacteria in forming N-linked glycoproteins. The heptasaccharide produced by its pgl system is attached to protein Asn through its terminal 2,4-diacetamido-2,4,6-trideoxy-d-Glc (QuiNAc4NAc or N,N'-diacetylbacillosamine) moiety. The crucial, last part of this sugar's synthesis is the acetylation of UDP-2-acetamido-4-amino-2,4,6-trideoxy-d-Glc by the enzyme PglD, with acetyl-CoA as a cosubstrate. We have determined the crystal structures of PglD in CoA-bound and unbound forms, refined to 1.8 and 1.75 A resolution, respectively. PglD is a trimer of subunits each comprised of two domains, an N-terminal alpha/beta-domain and a C-terminal left-handed beta-helix. Few structural differences accompany CoA binding, except in the C-terminal region following the beta-helix (residues 189-195), which adopts an extended structure in the unbound form and folds to extend the beta-helix upon binding CoA. Computational molecular docking suggests a different mode of nucleotide-sugar binding with respect to the acetyl-CoA donor, with the molecules arranged in an "L-shape", compared with the "in-line" orientation in related enzymes. Modeling indicates that the oxyanion intermediate would be stabilized by the NH group of Gly143', with His125' the most likely residue to function as a general base, removing H+ from the amino group prior to nucleophilic attack at the carbonyl carbon of acetyl-CoA. Site-specific mutations of active site residues confirmed the importance of His125', Glu124', and Asn118. We conclude that Asn118 exerts its function by stabilizing the intricate hydrogen bonding network within the active site and that Glu124' may function to increase the pKa of the putative general base, His125'.

Structure and Active Site Residues of PglD, an N-Acetyltransferase from the Bacillosamine Synthetic Pathway Required for N-Glycan Synthesis in Campylobacter jejuni(,).,Rangarajan ES, Ruane KM, Sulea T, Watson DC, Proteau A, Leclerc S, Cygler M, Matte A, Young NM Biochemistry. 2008 Feb 19;47(7):1827-1836. Epub 2008 Jan 17. PMID:18198901<ref>PMID:18198901</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 3bfp" style="background-color:#fffaf0;"></div>

[[Category: Campylobacter fetus subsp. jejuni smibert 1974]]

[[Category: Structural genomic]]

[[Category: Cygler, M]]

[[Category: Leclerc, S]]

[[Category: Matte, A]]

[[Category: Proteau, A]]

[[Category: Rangarajan, E S]]

[[Category: Watson, D C]]

[[Category: Young, N M]]

[[Category: Transferase]]