>TIGR01087 murD UDP-N-acetylmuramoylalanine--D-glutamate ligase; InterPro: IPR005762 The bacterial cell wall provides strength and rigidity to counteract internal osmotic pressure, and protection against the environment. The peptidoglycan layer gives the cell wall its strength, and helps maintain the overall shape of the cell. The basic peptidoglycan structure of both Gram-positive and Gram-negative bacteria is comprised of a sheet of glycan chains connected by short cross-linking polypeptides. Biosynthesis of peptidoglycan is a multi-step (11-12 steps) process comprising three main stages: (1) formation of UDP-N-acetylmuramic acid (UDPMurNAc) from N-acetylglucosamine (GlcNAc). (2) addition of a short polypeptide chain to the UDPMurNAc. (3) addition of a second GlcNAc to the disaccharide-pentapeptide building block and transport of this unit through the cytoplasmic membrane and incorporation into the growing peptidoglycan layer. Stage two involves four key Mur ligase enzymes: MurC (6.3.2.8 from EC) , MurD (6.3.2.9 from EC) , MurE (6.3.2.13 from EC) and MurF (6.3.2.10 from EC) . These four Mur ligases are responsible for the successive additions of L-alanine, D-glutamate, meso-diaminopimelate or L-lysine, and D-alanyl-D-alanine to UDP-N-acetylmuramic acid. All four Mur ligases are topologically similar to one another, even though they display low sequence identity. They are each composed of three domains: an N-terminal Rossmann-fold domain responsible for binding the UDPMurNAc substrate; a central domain (similar to ATP-binding domains of several ATPases and GTPases); and a C-terminal domain (similar to dihydrofolate reductase fold) that appears to be associated with binding the incoming amino acid. The conserved sequence motifs found in the four Mur enzymes also map to other members of the Mur ligase family, including folylpolyglutamate synthetase, cyanophycin synthetase and the capB enzyme from Bacillales . This entry represents UDP-N-acetylmuramoylalanine-D-glutamate ligase (MurD). MurD catalyses the addition of d-glutamate to the nucleotide precursor UDP-N-acetylmuramoyl-l-alanine. ; GO: 0005524 ATP binding, 0008764 UDP-N-acetylmuramoylalanine-D-glutamate ligase activity, 0008360 regulation of cell shape, 0009252 peptidoglycan biosynthetic process, 0009273 peptidoglycan-based cell wall biogenesis, 0051301 cell division, 0005737 cytoplasm.

Probab=100.00 E-value=9.9e-38 Score=252.27 Aligned_cols=312 Identities=21% Similarity=0.229 Sum_probs=215.4 Q ss_pred CEEEEECCCCHHHHHHHHHHHHHHCCCCEEEEECCCCCEEEEEEEECCCCCCCEECCHHHHHHHHHHHHHCCCCCCCCHH Q ss_conf 83999458984799999999999978935141378411012008988847787155889999999998630477677957 Q gi|254780821|r 25 PVIHIGGTNGKGSVASFSQRLLETSGLSVHVHTSPHLIRWNERFRLGVKGGRGRLVEDVELLDVFRRVRRVKSAQNLTIF 104 (429) Q Consensus 25 ~vI~VtGTnGKttt~~~i~~il~~~g~k~g~~tSPhl~~~~Eri~i~~~~~~g~~i~~~~~~~~~~~i~~~~~~~~~t~F 104 (429) T Consensus 111 ~~~aITGTnGKtTTT~L~~~~L~~~G~~a~---------------~gGNI--G~p~L----------------------- 150 (476) T TIGR01087 111 KVVAITGTNGKTTTTSLLYHLLKAAGLKAV---------------LGGNI--GTPAL----------------------- 150 (476) T ss_pred CEEEEECCCCHHHHHHHHHHHHHHCCCCEE---------------EECCC--CCHHH----------------------- T ss_conf 379997268607999999999984699778---------------62578--81255----------------------- Q ss_pred HHHHHHHHHHHHCCCCCHHHHHHHHHHHHHHHCCCC-CCCEEEEEECCCHHCCCCCCCHHHHHHHHHHHCCCC---CCCC Q ss_conf 899999998741144624777644475676413567-751589860250000002785234456665311379---8331 Q gi|254780821|r 105 ELSIATALVLFSKYPADCAIIEVGLGGSLDATNIIE-KVAVSVITSISLDHEKILGNTVSAIAKDKSGIIKPG---CPVV 180 (429) Q Consensus 105 E~lt~~a~~~f~~~~~d~~vlE~GlGGr~DaTnvi~-~~~vavITnI~~DHle~LG~tle~Ia~eKa~I~k~~---~~~v 180 (429) T Consensus 151 --------~~~~~~~~~~~VlElSS-FQL~~~~~~~p~p~i~~~lNi~~DHLD~h~-~~~~Y~~aK~~i~~~~~~~d~~v 220 (476) T TIGR01087 151 --------EVLDQEGAELYVLELSS-FQLETTESLRPAPEIALILNISEDHLDWHG-SFEDYVAAKLKIFARQTEGDVAV 220 (476) T ss_pred --------HHHCCCCCCEEEEEECC-HHHCCCCCCCCCCEEEEEECCCHHHHCCCC-CHHHHHHHHHHHHCCCCCCCEEE T ss_conf --------53105889669997000-320457555665124687066356301107-98899999889852599876798 Q ss_pred CCCCCCHHHHHHHHHHHHHCCCCCCCCCCCC---C----CCCCCCEEEEEECC---------CCCCCCCCCCCCCCCCCC Q ss_conf 5444717898899998621056652357632---1----01258524443103---------333444444322221111 Q gi|254780821|r 181 IGHQVYDEVREILVSKAEKMGCPYNVYGDDF---Y----AFEKNKCLVYQDKI---------SQTNLTVLGLVGEHQYIN 244 (429) Q Consensus 181 ~~~~~~~~~~~~i~~~a~~~~~~~~~~~~~~---~----~~~~~~~~~~~~~~---------~~~~~~~l~l~G~hn~~N 244 (429) T Consensus 221 ~n~d~~--~~~~~~~~~~~~~~~~~~~~~~~CP~~~~~~l~~~~~~~~l~~~~e~~~~C~~~~~~~~~~~~l~g~h~~~n 298 (476) T TIGR01087 221 LNADQA--YDPRFTRLEKKSKAQVVLFSVEKCPAEAEQGLEIRDGKEYLKPNDENDFACDDLTILPCEELKLLGLHNAEN 298 (476) T ss_pred EECCCC--CCCHHHHCCCCCCCEEEEECCCCCCHHHHHHHHHCCCCEEECCCCCCCCCHHHHHHHHHCCCCCCCHHHHHH T ss_conf 812002--550465212467530787404458088997641238852633678763000011243321567678889999 Q ss_pred HHHHHHHHHHHHHC--CHHHHCCCCCCCCC-CCCCEEEEECCCCCCCCCCCCEEEEEC-CCCHHHHHHHHHHHHHHCCCC Q ss_conf 14699998753200--00110011222233-665303542287544457874599933-632157998886543311477 Q gi|254780821|r 245 AATAICAVQMAGFT--LEKECINAALQSVQ-WFGRLQKITEGPLLNKLPDHSEVWIDG-GHNPNAGLVVSKEISKLKGSS 320 (429) Q Consensus 245 a~~Aiaa~~~lg~~--i~~~~I~~gL~~~~-~pGR~e~i~~~~~~~~~~~~~~viiD~-AHNp~s~~~l~~~l~~l~~~~ 320 (429) T Consensus 299 ~laa~ala~~~g~~~~~~~~~~~~~l~~F~~~~HRlE~~~~-------~~G~~f~NDSKATn~~At~~AL~~~~~----- 366 (476) T TIGR01087 299 ILAAIALAKSLGLNSDEELEAILEALRSFKGLPHRLEYVGQ-------KNGVHFINDSKATNVHATLAALSALKN----- 366 (476) T ss_pred HHHHHHHHHHHCCCCCCHHHHHHHHHHHCCCCCCCEEEEEE-------CCCEEEEECCCCCCHHHHHHHHHHCCC----- T ss_conf 99999999982889760168999999845798762688777-------285479825621218999999984799----- Q ss_pred CCCEEEEECC-CCCCCHHHHHHHHHHHCCEEEEEEECCCCCCCCCCCCCHHHHHHHHHHCCCCE-E----EECCHHHHHH Q ss_conf 7712431134-67989899999888638889998422889984212789899999998549978-9----9699899999 Q gi|254780821|r 321 NKPFYLVIGM-VEGKKYGRYLEAFVELSPIVLSVSLICRGRERQSISITPKVLMQEAKKLGFQA-M----ACSSMIEALS 394 (429) Q Consensus 321 ~~~i~~I~G~-~~dKd~~~~l~~l~~~~d~i~~~~~~~~~~~~~~~~~~~~~l~~~~~~~~~~~-~----~~~~~~eAi~ 394 (429) T Consensus 367 ~~~~~LI~GG~~KG~df~~L~~~~~~~~~~~~~~------------G~~~~~~~~~l~~~~~~~~~~~~~~~~~l~~Av~ 434 (476) T TIGR01087 367 PKRVILIVGGDDKGADFSPLAPALKKKVKAVLAI------------GEDAAKIAKLLKEIGLVVKYGEETLVESLEEAVQ 434 (476) T ss_pred CCEEEEEEECCCCCCCHHHHHHHHCCCEEEEEEE------------CCCHHHHHHHHHHCCCCCCCCCCHHHHHHHHHHH T ss_conf 9718999603468998489999843650799985------------3547899998634276435465305778999999 Q ss_pred HHHHHCCCCCC--CEEEE---ECCH Q ss_conf 99986035886--79999---4977 Q gi|254780821|r 395 RVRKINEELPP--PLILI---AGSL 414 (429) Q Consensus 395 ~a~~~~~~~~~--d~VLV---~GS~ 414 (429) T Consensus 435 ~a~~~~~--~g~~d~vLLSPacASF 457 (476) T TIGR01087 435 AAREVAK--EGNADVVLLSPACASF 457 (476) T ss_pred HHHHHHC--CCCCCEEEECCCCCCH T ss_conf 9999712--7997679888641217

HHsearch alignment for GI: 254780821 and conserved domain: TIGR01087