>TIGR01173 glmU UDP-N-acetylglucosamine pyrophosphorylase; InterPro: IPR005882 N-Acetylglucosamine-1-PO(4) uridyltransferase (GlmU, 2.7.7.23 from EC) is a trimeric bifunctional enzyme that catalyzes the last two sequential reactions in the de novo biosynthetic pathway for UDP-GlcNAc. The X-ray crystal structure of Escherichia coli GlmU in complex with UDP-GlcNAc and CoA has been determined to 2.1 A resolution and reveals a two-domain architecture that is responsible for these two reactions . The C-terminal domain is responsible for the CoA-dependent acetylation of Glc-1-PO(4) to GlcNAc-1-PO(4) and displays the longest left-handed parallel beta-helix observed to date. The acetyltransferase active site defined by the binding site for CoA makes use of residues from all three subunits and is positioned beneath an open cavity large enough to accommodate the Glc-1-PO(4) acetyl acceptor. The N-terminal domain catalyzes uridyl transfer from UTP to GlcNAc-1-PO(4) to form the final products UDP-GlcNAc and pyrophosphate. This domain is composed of a central seven-stranded beta-sheet surrounded by six alpha-helices in a Rossmann fold-like topology. ; GO: 0003977 UDP-N-acetylglucosamine diphosphorylase activity, 0009103 lipopolysaccharide biosynthetic process.

Probab=99.89 E-value=5.5e-24 Score=148.88 Aligned_cols=164 Identities=27% Similarity=0.422 Sum_probs=121.2 Q ss_pred CCCCCCCCCCCCCCCCCCCCCEEHHHCCCCCCEEEECCCCCCCCHHCCCCCCCCCCCCCEEEEEEE-EEEEECCCCCEEE Q ss_conf 543331001565323344200001100112320331122100000002332100233220233100-2442010000023 Q gi|254780771|r 116 EGGISPQAFLGEDVKIEDGVVIAPMAVVYPGVEIGRKTYVGPGSVIGAGVRIGRNCSIGAGSSIYS-SLIGNSVILHSGV 194 (347) Q Consensus 116 ~~~I~~~a~I~~~a~I~~~v~I~~~~~I~~~v~IG~~~~I~~~~~I~~~~~IG~~~~I~~~~~I~~-~iIG~~~~I~~~~ 194 (347) T Consensus 277 Dv~I~~~v~leG~v~iG~~v~IGp~~~I~-ns~I~~~~~I~~~s~~e-~~~ig~~~~vGPFArLRP~~~L~~~~hiGNFV 354 (461) T TIGR01173 277 DVVIDPNVILEGKVQIGDDVVIGPGCVIK-NSVIGSNAVIKPYSVLE-GSEIGEGCDVGPFARLRPGSVLGAGVHIGNFV 354 (461) T ss_pred EEEECCCCEECCEEEECCCEEECCCCEEE-EEEECCCCEEEEEEECC-CCEECCCCEECCCCCCCCCCHHHCCCEEEEEE T ss_conf 16975583883407987870788985899-72886885588888414-67861564027730018643211778160258 Q ss_pred ECCCCCCCCCCCCCCCCCCCCC---CCCEECCCCCCCCCCCCCCC---CCCCCCCCCCCCCCCCCCCCCCCCCCCCEEEE Q ss_conf 2134454335566653110444---32000024444544443322---22221111122211123444465035771886 Q gi|254780771|r 195 RIGNDGFGYARGVSDIHKIVHI---GRVIIQDKVEIGANSAIDRG---TIDDTIIGENTKIDNQVQIGHNVHIGCGCIIV 268 (347) Q Consensus 195 vIG~~GFgf~~~~~~~~~~~~~---G~v~Ig~~v~IG~n~tIdrg---~~~~t~Ig~~~~id~~v~i~hn~~iG~~~~~~ 268 (347) T Consensus 355 E~Kna~i------G~gsKA~HLsYlGDAeiG~~vNiGAGtITcNYDG~nK~~T~IGd~V------------FiGSnt~LV 416 (461) T TIGR01173 355 EVKNARI------GEGSKAGHLSYLGDAEIGSNVNIGAGTITCNYDGVNKHKTIIGDGV------------FIGSNTQLV 416 (461) T ss_pred EEECCEE------CCCCCCCCCCEEEEEEECCCCEECCEEEEEECCCCCCCCCEECCCC------------EECCCCEEE T ss_conf 6524761------8864423143332025079600323168993279622034864887------------877676045 Q ss_pred EEEEEECCCEECCCCEEEECCEEECCEEECCCCEECCCC Q ss_conf 555650363656972973068783785988888986253 Q gi|254780771|r 269 SQVGIAGSTYIGDNVLIGGQCGIAGYLKIGDNVQIASKS 307 (347) Q Consensus 269 ~~~~~~g~~~ig~~~~ig~~~~i~~~v~ig~~~~i~a~s 307 (347) T Consensus 417 AP------V~iG~gA~iaAGstvt~D--Vp~g~La~~R~ 447 (461) T TIGR01173 417 AP------VKIGDGATIAAGSTVTKD--VPEGALAIARA 447 (461) T ss_pred CC------EEECCCCEECCCCEEECC--CCCCCCEEECC T ss_conf 54------394381187124148023--48885266245

HHsearch alignment for GI: 254780771 and conserved domain: TIGR01173