HHsearch alignment for GI: 254780872 and conserved domain: TIGR01082
>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=95.12 E-value=0.28 Score=28.62 Aligned_cols=140 Identities=19% Similarity=0.163 Sum_probs=80.5
Q ss_pred HH--HHHHHHHHCCCCEEEECCHHHH-HHHHHHHHHCCCCCCCCCC-CCCCCCCC-CCCCHHHHEEC-CCHHCCCCHHHH
Q ss_conf 56--9999997319816995213567-7888865310112111122-10012321-11530130012-431026888899
Q gi|254780872|r 77 GG--LLSEPMAQMGATVTGIDPSTKN-IAIAKNHANMKNINIDYRV-SCAEEIAE-TDEKFDIILNM-EVIEHVDNIPYF 150 (254)
Q Consensus 77 ~G--~~s~~la~~g~~V~giD~S~~~-i~~Ak~~a~~~~~~i~~~~-~~~~~l~~-~~~~FD~V~~~-~vleHv~d~~~~ 150 (254)
T Consensus 10 ~GMSglA~~L~~~G~~VsGSD~~~~~y~t-~--~L~~~Gi~I~-~g~h~~~n~~~~p~g~~~vVv~S~~Ai---~~~NpE 82 (491)
T TIGR01082 10 IGMSGLAEILLNRGYKVSGSDIAENAYTT-K--RLEALGIKIY-IGEHSAENLDDLPTGAADVVVVSAAAI---KEDNPE 82 (491)
T ss_pred HCHHHHHHHHHHCCCCEEEEECCCCCCHH-H--HHHHCCCEEC-CCCCCHHHHCCCCCCCCCEEEEEEECC---CCCCHH
T ss_conf 03448999998578908772033563158-9--9986787662-799677982036789743799864033---788888
Q ss_pred HHHHHHHCCCCCEEEEECCCCCCHHHHHHHHHHH-HHCCCCCCCCCCHHHCCCHHHHHHHHHHCCCEEEEEEEEEECCCC
Q ss_conf 8888752133321577436766024564156554-310467899857122538899999999869838885505766777
Q gi|254780872|r 151 IKTCCSLLLSNGLMFISTINRNLKAMLLAIIGAE-YLLQWLPKGTHQYDKFIKPTEMECFLAANKVKIIDRVGVVYNVFC 229 (254)
Q Consensus 151 l~~~~~~LkpgG~liist~Nr~~~s~~~~i~~ae-~il~~~P~gtH~~~~Fi~p~el~~~l~~~g~~~~~~~g~~~~p~~ 229 (254)
T Consensus 83 i~~A~~~----~IPv~~---R~--~~Lael~~~~k~~iaV--aGtH--GKTTTTamia~~~~~aGLdPt~~~GG~~~~~~ 149 (491)
T TIGR01082 83 IVEAKER----GIPVIR---RA--EMLAELMRKRKESIAV--AGTH--GKTTTTAMIAVILKEAGLDPTVIVGGEVKEAG 149 (491)
T ss_pred HHHHHHC----CCCEEC---HH--HHHHHHHHHHCCEEEE--ECCC--CCHHHHHHHHHHHHHCCCCCCEEECCCCCCCC
T ss_conf 9999964----888133---78--9999998620870799--8368--72568999999998449997689866436657
Q ss_pred CEEEECC
Q ss_conf 7578647
Q gi|254780872|r 230 NKWQLSA 236 (254)
Q Consensus 230 ~~w~~~~ 236 (254)
T Consensus 150 ~Na~~g~ 156 (491)
T TIGR01082 150 TNARLGS 156 (491)
T ss_pred CCEEECC
T ss_conf 7435714