>TIGR01082 murC UDP-N-acetylmuramate--alanine ligase; InterPro: IPR005758 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-acetylmuramate-alanine ligase (MurC). MurC is an essential, cytoplasmic peptidoglycan biosynthetic enzyme, catalyzes the ATP-dependent ligation of L-alanine (Ala) and UDP-N-acetylmuramic acid (UNAM) to form UDP-N-acetylmuramyl-L-alanine (UNAM-Ala). The enzyme is a nonribosomal peptide ligase which utilises ATP to form an amide bond between L-alanine and UNAM.1 Mechanistic studies on the Escherichia coli MurC enzyme using oxygen isotope analyses demonstrated that the enzyme-catalyzed reaction proceeds through an acyl phosphate UNAM intermediate prior to L-alanine addition.; GO: 0005524 ATP binding, 0008763 UDP-N-acetylmuramate-L-alanine 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=0 Score=869.20 Aligned_cols=452 Identities=47% Similarity=0.816 Sum_probs=428.0 Q ss_pred EEEEEEECHHHHHHHHHHHHHCCCEEEEEECCCCH-HHHHHHHCCCEEEEC-CCHHHCCC-----CCEEEEC-CCCCCCC Q ss_conf 07999461460878999999879869996078998-899999889889967-99788688-----9899988-8989999 Q gi|254781096|r 9 PIHFVGIGGIGMSGIAEVLHNTGHQVQGSDVILGP-NVQRLHKQGIKVSIG-HKVENIDN-----AEILVLS-TAIDKDN 80 (474) Q Consensus 9 ~i~~iGigG~G~s~lA~~l~~~G~~V~g~D~~~~~-~~~~L~~~gi~i~~g-~~~~~i~~-----~d~vV~s-pgi~~~~ 80 (474) T Consensus 1 ~iHFvGIGG~GMSglA~~L~~~G~~VsGSD~~~~~y~t~~L~~~Gi~I~~g~h~~~n~~~~p~g~~~vVv~S~~Ai~~~N 80 (491) T TIGR01082 1 KIHFVGIGGIGMSGLAEILLNRGYKVSGSDIAENAYTTKRLEALGIKIYIGEHSAENLDDLPTGAADVVVVSAAAIKEDN 80 (491) T ss_pred CEEEEECCHHCHHHHHHHHHHCCCCEEEEECCCCCCHHHHHHHCCCEECCCCCCHHHHCCCCCCCCCEEEEEEECCCCCC T ss_conf 95789606203448999998578908772033563158999867876627996779820367897437998640337888 Q ss_pred HHHHHHHHCCCCEEEHHHHHHHHHCCC-CCEEEECCCCCCHHHHHHHHHHCCCCCCEEEEECCCCCCCCCCCCCCC-CCC Q ss_conf 889999977994995389988641168-515870457840477888864034444305753573333310014685-420 Q gi|254781096|r 81 VECIAARERNIPIIFRSEMLAGLMRCR-KSISVSGTHGKTTTTSLIAALLEQGKFDPTVINGGIINSYGTNARIGT-SEW 158 (474) Q Consensus 81 ~~l~~a~~~gi~i~~~~e~l~~~~~~~-~~IaVTGTnGKTTTt~ml~~il~~~g~~~~~~~G~~~~~~~~~~~~~~-~~~ 158 (474) T Consensus 81 pEi~~A~~~~IPv~~R~~~Lael~~~~k~~iaVaGtHGKTTTTamia~~~~~aGLdPt~~~GG~~~~~~~Na~~g~~~~~ 160 (491) T TIGR01082 81 PEIVEAKERGIPVIRRAEMLAELMRKRKESIAVAGTHGKTTTTAMIAVILKEAGLDPTVIVGGEVKEAGTNARLGSSGEY 160 (491) T ss_pred HHHHHHHHCCCCEECHHHHHHHHHHHHCCEEEEECCCCCHHHHHHHHHHHHHCCCCCCEEECCCCCCCCCCEEECCCCCE T ss_conf 88999996488813378999999862087079983687256899999999844999768986643665774357146867 Q ss_pred CHHHCCCCC--CHHHHCCCCCEEEEEEECCCHH--HCCHHHHHHHHHHCCCCCCCCCCCCCCCCCCCHHHHHHHHCCCC- Q ss_conf 011023221--0122118553034222022011--00025566664301333333222222234650134543200111- Q gi|254781096|r 159 IVVEADESD--GTFIRLPSDIVVVTNIDPEHLD--YYGDFNAIRAAFYKFIDNIPFYGFAVVCMDHPEVRSLIARIQNR- 233 (474) Q Consensus 159 ~V~E~~e~~--~s~~~~~P~iaVitNI~~DHld--~~~s~e~y~~aK~~i~~~~~~~g~~vin~Dd~~~~~~~~~~~~~- 233 (474) T Consensus 161 lvaEaDESd~~~sFl~~~P~~ai~TNie~DH~D~tY~~~~E~~~~aF~~F~~~l~~~G~~v~c~DD~~~~~l~~~~~~~r 240 (491) T TIGR01082 161 LVAEADESDRSASFLHLQPEVAIVTNIEPDHLDNTYGSSLERLKAAFEKFIHNLPFYGLAVICADDPVLRKLVPKATESR 240 (491) T ss_pred EEEEEEECCCCCCHHCCCCCEEEECCCCCCCCCCCCCCCHHHHHHHHHHHHHHCCCCCEEEEECCCHHHHHHHHHHHHCC T ss_conf 99998723776401206985799747774347766645789999999999982788879999838654787763555338 Q ss_pred --CCCCCCCC-CCCCEEEEEEEECCCCCEEEEEEECCCCCCCCC-CCCCCCCCCCCCCCCCCCCCCCHHHHHHCHH---- Q ss_conf --23333333-222202210211258420135551134444420-0002356765433322112100123210000---- Q gi|254781096|r 234 --KIITYGRH-PQADIRYSNIRKYSGRSIFDVSVQGNVTKDLTV-IKDLSLPLIGEHNISNACASIAVAYKLGLSS---- 305 (474) Q Consensus 234 --~v~~fg~~-~~~d~~~~~i~~~~~~~~f~~~~~~~~~~~~~~-~~~~~l~l~G~Hn~~NalaAia~a~~lgi~~---- 305 (474) T Consensus 241 ~d~~~~y~~~~~~~~~~~~~~~~~~~~~~f~v~~~~~~~~~~~~G~~~~~~~~pG~HNvLNAlAA~ava~~~g~~~~G~~ 320 (491) T TIGR01082 241 KDVVITYGGSGEDADIRAENIQQSGAEFEFSVRLKGKLGEATTEGPLEFKLNLPGRHNVLNALAAIAVALELGLDFYGKV 320 (491) T ss_pred CEEEEECCCCCCCCEEEEEEEEECCCEEEEEEEECCCCCCCEEEEEEEEEEECCCCCCHHHHHHHHHHHHHHCCCCCCCE T ss_conf 70478668777641477887432264589999970452201110027999803872006789999988887221236855 Q ss_pred -----HHHHHHHHCCCCCCCCEEEECCCCC------EEEEEECCCCCCCCHHHHHHHHCCCC---CCCEEEEECCCCHHH Q ss_conf -----0013343100001582211014786------04763024455430222333101344---321033303663147 Q gi|254781096|r 306 -----EDVKKGLASFSGIKRRFTLVGVWND------VHVFDDYGHHPIEISSVLAAVRQICP---RKIIAIHQPHRYSRL 371 (474) Q Consensus 306 -----e~i~~~L~~f~g~~~R~e~v~~~~g------v~~idDyahnP~~i~atl~al~~~~~---~rii~i~~p~~~sr~ 371 (474) T Consensus 321 ~~~~~~~I~~~L~~F~G~~RRf~~~g~~~~~~n~g~~~~~DDYAHHPtEi~aTl~aAr~~~~~k~~r~v~~FQPHrYsRT 400 (491) T TIGR01082 321 IVDFLEAIKRALANFQGVKRRFEILGECNGGNNNGTVLLIDDYAHHPTEIKATLAAARQVYPDKNRRIVVVFQPHRYSRT 400 (491) T ss_pred EEEHHHHHHHHHHCCCCCCHHHHHHHHCCCCCCCCEEEEEECCCCCHHHHHHHHHHHHHHHCCCCCEEEEEECCCCHHHH T ss_conf 64158999999850689731012010027898752799996589997899999999987521179579999749856789 Q ss_pred HHHHHHHHHHHHH-CCEEEEECCCCCCCCCCCCCCHHHHHHHHHHCC-CCCEEEECCHHHHHHHHHHHCCCCCEEEEECC Q ss_conf 8889999999861-899999086667764323899999999999638-99899988989999999985589879999448 Q gi|254781096|r 372 STLFDQFSSCFGD-ADIVLISPVYSAGEKEIPGFSSPELVKNIKLQG-HPQAYYMDSFDHLVSKILAIAEPGDFIIFFGA 449 (474) Q Consensus 372 ~~~~~e~~~~l~~-ad~vil~~i~~~~e~~~~g~~~~~l~~~i~~~~-~~~~~~~~~~~eav~~~~~~~~~gDvVL~~Ga 449 (474) T Consensus 401 ~~~~~~F~~~L~~haD~l~~~diY~A~E~~~~g~~~~~l~~~~~~~~~~~~~~f~~~~~~~~~~l~~~~~~GD~~~~~GA 480 (491) T TIGR01082 401 KDLFDDFAKVLSDHADELILLDIYAAGEEPIAGIDGKSLARKITQKKGKEEPYFVPDLAEVVEFLAEVLQSGDLILTMGA 480 (491) T ss_pred HHHHHHHHHHHHHCCCEEEEECCCCCCCCCCCCCCHHHHHHHHHHCCCCCCCCCCCHHHHHHHHHHHHCCCCCEEEEECC T ss_conf 98899999999730899998153211367767877899999986257877761042177899999997169989999605 Q ss_pred CCHHHHHHHHH Q ss_conf 99889999999 Q gi|254781096|r 450 GNITQWAASLI 460 (474) Q Consensus 450 G~~~~~~~~~~ 460 (474) T Consensus 481 G~~~~~~~~l~ 491 (491) T TIGR01082 481 GDVSKLAEELL 491 (491) T ss_pred CCHHHHCCCCC T ss_conf 52010000029

HHsearch alignment for GI: 254781096 and conserved domain: TIGR01082