1g95

<StructureSection load='1g95' size='340' side='right' caption='[[1g95]], [[Resolution|resolution]] 2.33&Aring;' scene=''>

<table><tr><td colspan='2'>[[1g95]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1G95 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1G95 FirstGlance]. <br>

</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1g97|1g97]]</td></tr>

<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/UDP-N-acetylglucosamine_diphosphorylase UDP-N-acetylglucosamine diphosphorylase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.23 2.7.7.23] </span></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=1g95 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1g95 OCA], [http://pdbe.org/1g95 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1g95 RCSB], [http://www.ebi.ac.uk/pdbsum/1g95 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1g95 ProSAT]</span></td></tr>

[[http://www.uniprot.org/uniprot/GLMU_STRPN GLMU_STRPN]] Catalyzes the last two sequential reactions in the de novo biosynthetic pathway for UDP-N-acetylglucosamine (UDP-GlcNAc). The C-terminal domain catalyzes the transfer of acetyl group from acetyl coenzyme A to glucosamine-1-phosphate (GlcN-1-P) to produce N-acetylglucosamine-1-phosphate (GlcNAc-1-P), which is converted into UDP-GlcNAc by the transfer of uridine 5-monophosphate (from uridine 5-triphosphate), a reaction catalyzed by the N-terminal domain (By similarity).

<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/g9/1g95_consurf.spt"</scriptWhenChecked>

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== Publication Abstract from PubMed ==

N-Acetylglucosamine-1-phosphate uridyltransferase (GlmU) is an essential bacterial enzyme with both an acetyltransferase and a uridyltransferase activity which have been mapped to the C-terminal and N-terminal domains, respectively. GlmU performs the last two steps in the synthesis of UDP-N-acetylglucosamine (UDP-GlcNAc), which is an essential precursor in both the peptidoglycan and the lipopolysaccharide metabolic pathways. GlmU is therefore an attractive target for potential antibiotics. Knowledge of its three-dimensional structure would provide a basis for rational drug design. We have determined the crystal structures of Streptococcus pneumoniae GlmU (SpGlmU) in apo form at 2.33 A resolution, and in complex with UDP-N-acetyl glucosamine and the essential co-factor Mg(2+) at 1.96 A resolution. The protein structure consists of an N-terminal domain with an alpha/beta-fold, containing the uridyltransferase active site, and a C-terminal domain with a long left-handed beta-sheet helix (LbetaH) domain. An insertion loop containing the highly conserved sequence motif Asn-Tyr-Asp-Gly protrudes from the left-handed beta-sheet helix domain. In the crystal, S. pneumoniae GlmU forms exact trimers, mainly through contacts between left-handed beta-sheet helix domains. UDP-N-acetylglucosamine and Mg(2+) are bound at the uridyltransferase active site, which is in a closed form. We propose a uridyltransferase mechanism in which the activation energy of the double negatively charged phosphorane transition state is lowered by charge compensation of Mg(2+) and the side-chain of Lys22.

Crystal structures of Streptococcus pneumoniae N-acetylglucosamine-1-phosphate uridyltransferase, GlmU, in apo form at 2.33 A resolution and in complex with UDP-N-acetylglucosamine and Mg(2+) at 1.96 A resolution.,Kostrewa D, D'Arcy A, Takacs B, Kamber M J Mol Biol. 2001 Jan 12;305(2):279-89. PMID:11124906<ref>PMID:11124906</ref>

 

[[Category: UDP-N-acetylglucosamine diphosphorylase]]

[[Category: Arcy, A D]]

[[Category: Kamber, M]]

[[Category: Kostrewa, D]]

[[Category: Acetyltransferase]]

[[Category: Glmu]]

[[Category: Uridyltransferase pyrophosphorylase]]