>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=478.21 Aligned_cols=400 Identities=22% Similarity=0.297 Sum_probs=298.3 Q ss_pred EEEEECCCHHHHH-HHHHHHHCCCEEEEEECC-CH-HHHHHHHCCCEEE-C-CCCCCCCC-----CCEEEEC-CCCCCCC Q ss_conf 7999836854899-999999859869998189-64-7889997898996-4-53157225-----8889988-8868567 Q gi|254781099|r 10 SIAVFGLGRSGLS-AACALKDSGVHVIAWDDH-PC-AVKQAKDMGIEVI-D-FREIPWSI-----ISFLVLS-PGIALTG 78 (468) Q Consensus 10 ~v~i~G~G~sG~s-~A~~l~~~G~~V~~~D~~-~~-~~~~l~~~g~~~~-~-~~~~~~~~-----~d~vv~S-pgi~~~~ 78 (468) T Consensus 1 ~iHFvGIGG~GMSglA~~L~~~G~~VsGSD~~~~~y~t~~L~~~Gi~I~~g~h~~~n~~~~p~g~~~vVv~S~~Ai~~~- 79 (491) T TIGR01082 1 KIHFVGIGGIGMSGLAEILLNRGYKVSGSDIAENAYTTKRLEALGIKIYIGEHSAENLDDLPTGAADVVVVSAAAIKED- 79 (491) T ss_pred CEEEEECCHHCHHHHHHHHHHCCCCEEEEECCCCCCHHHHHHHCCCEECCCCCCHHHHCCCCCCCCCEEEEEEECCCCC- T ss_conf 9578960620344899999857890877203356315899986787662799677982036789743799864033788- Q ss_pred CCCCHHHHHHHHCCCEEEEEHHHHHHHHHHCCCCCCEEEEECCCCCCHHHHHHHHHHHHHHHH--CCCCCCCCCCCCCCC Q ss_conf 557888999997698099830342233430156886899603457521578999999873100--000001244322110 Q gi|254781099|r 79 ENAHWCVKLANQFNVEIIGDIELFVRERRFSSLQSPFIAVTGTNGKSSTVALISHVLRKNGYD--VQLGGNIGLPILNLE 156 (468) Q Consensus 79 ~~~~~~~~~a~~~gi~v~s~~el~~~~~~~~~~~~~vI~VTGT~GKTTt~~ll~~iL~~~g~~--~~~~GNiG~p~~~~~ 156 (468) T Consensus 80 ---NpEi~~A~~~~IPv~~R~~~Lael~~~~--k-~~iaVaGtHGKTTTTamia~~~~~aGLdPt~~~GG~~~~-~~~Na 152 (491) T TIGR01082 80 ---NPEIVEAKERGIPVIRRAEMLAELMRKR--K-ESIAVAGTHGKTTTTAMIAVILKEAGLDPTVIVGGEVKE-AGTNA 152 (491) T ss_pred ---CHHHHHHHHCCCCEECHHHHHHHHHHHH--C-CEEEEECCCCCHHHHHHHHHHHHHCCCCCCEEECCCCCC-CCCCE T ss_conf ---8889999964888133789999998620--8-707998368725689999999984499976898664366-57743 Q ss_pred CCCC-CCEEEEECCCCCCCCC--C---CCCCCCCEEEEECCCHHH--HHHHHHHCCCCCCCEEEE---CCCCCCCCCCHH Q ss_conf 1688-8379992177543212--2---333221011100210122--211100001122100010---134432247867 Q gi|254781099|r 157 YFSP-NRFYVIECSSYQIELT--P---TIDPSIGVLLNISPDHLD--RHHTLENYVNIKKKIVTM---SKHAIICINDHQ 225 (468) Q Consensus 157 ~~~~-~~~~V~E~SSfQL~~~--~---~~~PdiavITNI~~DHLd--~~~s~e~y~~aK~~i~~~---~~~~iln~dd~~ 225 (468) T Consensus 153 ~~g~~~~~lvaEaD----ESd~~~sFl~~~P~~ai~TNie~DH~D~tY~~~~E~~~~aF~~F~~~l~~~G~~v~c~DD~~ 228 (491) T TIGR01082 153 RLGSSGEYLVAEAD----ESDRSASFLHLQPEVAIVTNIEPDHLDNTYGSSLERLKAAFEKFIHNLPFYGLAVICADDPV 228 (491) T ss_pred EECCCCCEEEEEEE----ECCCCCCHHCCCCCEEEECCCCCCCCCCCCCCCHHHHHHHHHHHHHHCCCCCEEEEECCCHH T ss_conf 57146867999987----23776401206985799747774347766645789999999999982788879999838654 Q ss_pred HHHHHHHCCCCCCEE-ECCCCC---CCCCCCCEEECCC--EEEECCCCC--------CCCCCCCCCCCHHHHHCCCHHHH Q ss_conf 899987401234301-103644---3222341121241--354146764--------21234558851011100110122 Q gi|254781099|r 226 CEKIAYDMNFIGHSI-SRISSQ---SLQSDSDLYIDES--FLKCSATSE--------VIFDFSQETKKHNIQNLVTSAVV 291 (468) Q Consensus 226 ~~~~~~~~~~~~~~~-~~~~~~---~~~~~~~~~~~~~--~~~~~~~~~--------~~~~~~~l~G~HNi~NalaAia~ 291 (468) T Consensus 229 ~~~l~~~~~~~r~d~~~~y~~~~~~~~~~~~~~~~~~~~~~f~v~~~~~~~~~~~~G~~~~~~~~pG~HNvLNAlAA~av 308 (491) T TIGR01082 229 LRKLVPKATESRKDVVITYGGSGEDADIRAENIQQSGAEFEFSVRLKGKLGEATTEGPLEFKLNLPGRHNVLNALAAIAV 308 (491) T ss_pred HHHHHHHHHHCCCEEEEECCCCCCCCEEEEEEEEECCCEEEEEEEECCCCCCCEEEEEEEEEEECCCCCCHHHHHHHHHH T ss_conf 78776355533870478668777641477887432264589999970452201110027999803872006789999988 Q ss_pred HHCCCCCC---------CCCHHHCCCHHHHHHHHHHHCCCCC------CEEECCCCCCCHH---HHHHHHHCC----CCC Q ss_conf 21022222---------1100000000134544332100343------0000023556755---555532013----332 Q gi|254781099|r 292 CMQLGLKV---------EEIKRALLSCGGLTHRLQTIARLGH------VIFINDSKATNLH---SVIHAFLNE----KRR 349 (468) Q Consensus 292 a~~lGi~~---------~~i~~~L~~f~gv~~R~E~i~~~~g------v~iIDDS~atnp~---a~~~Al~~~----~~~ 349 (468) T Consensus 309 a~~~g~~~~G~~~~~~~~~I~~~L~~F~G~~RRf~~~g~~~~~~n~g~~~~~DD-YAHHPtEi~aTl~aAr~~~~~k~~r 387 (491) T TIGR01082 309 ALELGLDFYGKVIVDFLEAIKRALANFQGVKRRFEILGECNGGNNNGTVLLIDD-YAHHPTEIKATLAAARQVYPDKNRR 387 (491) T ss_pred HHHHCCCCCCCEEEEHHHHHHHHHHCCCCCCHHHHHHHHCCCCCCCCEEEEEEC-CCCCHHHHHHHHHHHHHHHCCCCCE T ss_conf 887221236855641589999998506897310120100278987527999965-8999789999999998752117957 Q ss_pred CEEEE-CC-CCCCC-CHHHHHHHHCC-CCEEEEE-----------CCCHHHHHHHHHC---CCCEEEECCHHHHHHHHHH Q ss_conf 00120-32-10122-06898998427-8689998-----------8998998886316---8988998799999999999 Q gi|254781099|r 350 IYWIA-GG-LSKSD-DFSTLFPFISK-IAKAYFI-----------GNSAMLFFHHFGG---KINSTLSKTLDQALKSVVR 411 (468) Q Consensus 350 i~lI~-GG-~~K~~-d~~~L~~~~~~-~~~~~li-----------G~~~~~i~~~~~~---~~~~~~~~~~~~a~~~i~~ 411 (468) T Consensus 388 ~v~~FQPHrYsRT~~~~~~F~~~L~~haD~l~~~diY~A~E~~~~g~~~~~l~~~~~~~~~~~~~~f~~~~~~~~~~l~- 466 (491) T TIGR01082 388 IVVVFQPHRYSRTKDLFDDFAKVLSDHADELILLDIYAAGEEPIAGIDGKSLARKITQKKGKEEPYFVPDLAEVVEFLA- 466 (491) T ss_pred EEEEECCCCHHHHHHHHHHHHHHHHHCCCEEEEECCCCCCCCCCCCCCHHHHHHHHHHCCCCCCCCCCCHHHHHHHHHH- T ss_conf 9999749856789988999999997308999981532113677678778999999862578777610421778999999- Q ss_pred HHHHCCCCCEEEEC Q ss_conf 99844898599945 Q gi|254781099|r 412 DVENVQLPSIVLFS 425 (468) Q Consensus 412 ~~~~~~~gDiVLlS 425 (468) T Consensus 467 --~~~~~GD~~~~~ 478 (491) T TIGR01082 467 --EVLQSGDLILTM 478 (491) T ss_pred --HHCCCCCEEEEE T ss_conf --971699899996

HHsearch alignment for GI: 254781099 and conserved domain: TIGR01082