HHsearch alignment for GI: 254780153 and conserved domain: TIGR02080
>TIGR02080 O_succ_thio_ly O-succinylhomoserine (thiol)-lyase; InterPro: IPR011821 Proteins in this entry are important in the interconversion of the sulphur-containing amino acids L-cysteine and L-methionine in bacteria. In bacteria, inorganic sulphur is reduced to sulphide, which is then used to displace the acetyl group of O-acetyl-L-serine to form the essential amino acid L-cysteine. Biosynthesis of L-methionine then occurs via the transsulphuration pathway which involves the sequential action of two pyridoxal 5'-phosphate (PLP) enzymes, cystathionine gamma-synthase (CGS) and cystathionine beta-lyase (CBL). Firstly CGS catalyses the formation of the intermediate cystathione from a homoserine ester and L-cysteine. This intermediate is then converted by CBL to L-homoserine, which is subsequently methylated by methionine synthase to form L-methionine. For more information see . The CGS enzyme (P00935 from SWISSPROT) from Escherichia coli is, like other CGS enzymes, a homotetramer composed of two catalytically active dimers . The active site of each dimer is found at the interface between the monomers and involves residues from each monomer. Catalysis occurs by alpha,gamma-elimination/replacement reactions..
Probab=92.87 E-value=0.73 Score=24.91 Aligned_cols=286 Identities=18% Similarity=0.187 Sum_probs=164.2
Q ss_pred CCCCCHHHHHHHHHHHHHHHHHHCCCCCCEEEEECCCCHHHHHHHHHHCCCCCCEEEE---EECCHHHHHHHHHHHCCCC
Q ss_conf 5328988999999999999999688998579997487348999875320578970799---7073688888765323876
Q gi|254780153|r 39 RSHRCVLGKERINKAIQLTRKVLEVPENYRIAIVPASDTGAVEMALWSLLGYRGVDVL---AWESFGLGWMSDIRQLSLQ 115 (391)
Q Consensus 39 ~sHRs~~f~~i~~~~~~~l~~l~~~p~~y~v~~l~GsgT~~~ea~~~nl~~~~~~~~~---~~g~~~~r~~~~~~~~~~~ 115 (391)
T Consensus 45 YsRsGNPTRd~l~~aLA~LE---~G-~--~-AVvT~~GMsAI~L~~~~lL~pdDLlvAPHDCYGG-tYRLl~~lA~kG~~ 116 (383)
T TIGR02080 45 YSRSGNPTRDILQQALAELE---GG-A--G-AVVTNSGMSAIDLVTTALLGPDDLLVAPHDCYGG-TYRLLNALAKKGQF 116 (383)
T ss_pred CCCCCCCCHHHHHHHHHHHH---CC-C--C-CEECCCHHHHHHHHHHHEECCCCEEEECCCCCCC-HHHHHHHHHHCCCE
T ss_conf 68898975658999999984---89-9--8-2566856898876643120789768804326770-48888645207833
Q ss_pred CEEEEECCCCCCCCHHHCC---CCCCEEEEEEECCCCEEECCEEE-----ECCCCCCEEEEEEC--CHHHHCCCCCCCCE
Q ss_conf 3067405777657867678---55657997420242022032035-----02568614886401--10110254556857
Q gi|254780153|r 116 DVREFTAPYGSLPDFSKVD---FDRDVVFVWNGTTSGVCVPDVGF-----IPESREGLVICDAT--SAVFARHIDFNKLD 185 (391)
Q Consensus 116 ~~~~~~~~~g~~~~~~~~~---~~~~v~~~h~ETstGv~~~~~~~-----~~~~~~~llivD~v--Ss~g~~p~d~~~iD 185 (391)
T Consensus 117 ~v~fVDQ~-----D~~al~~ALa~kdPKLVlIEtPSNPLlRVVDI~~lc~La~~~G~~vvVDNTFLsP~lQ~PL~-LGAD 190 (383)
T TIGR02080 117 KVQFVDQS-----DEQALEAALAQKDPKLVLIETPSNPLLRVVDIAKLCKLAKAVGAVVVVDNTFLSPILQQPLS-LGAD 190 (383)
T ss_pred EEEEEECC-----HHHHHHHHHHHCCCCEEEEECCCCCCCHHHHHHHHHHHHHHCCEEEEEECCCCCHHHCCCCC-HHCC
T ss_conf 89986076-----28999999974698479986799885218889999988761883899855216776727530-1111
Q ss_pred EEEECCHHCCCCCCC--CEEEEECHHHHHHHHHCCCCCCCCCHHHCCHHHHHHCCCCCCCCCCCCCHHHHHHHHHHHHHH
Q ss_conf 999700120017665--154456778887654114457783123200112321033478644666448899999999862
Q gi|254780153|r 186 VVTFSAQKVLGGEAG--FGIIILSPASVERLEKYVPSWPLPKIFRMVKGGRVMEGLFCGETINTPSLLCIEDYIDALLWL 263 (391)
Q Consensus 186 v~~a~sQK~l~~ppG--l~~v~~s~~al~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~TP~v~~i~al~~~l~~i 263 (391)
T Consensus 191 ~V~HS~TKYlNGHSDVi~GaVIaKd~q------------------~~e~L~WW~N~l-G~---tG~aFDSY~t---LRGl 245 (383)
T TIGR02080 191 LVIHSTTKYLNGHSDVIAGAVIAKDPQ------------------LAEELAWWANAL-GV---TGGAFDSYLT---LRGL 245 (383)
T ss_pred EEHHHHHCCCCCCHHHHHHHHHCCCHH------------------HHHHHHHHHHCC-CC---CCCHHHHHHH---HHHH
T ss_conf 301111100034034312124014712------------------234433343002-55---4443468899---8678
Q ss_pred HCCCCHHHHHHHHHHHHHHHHHHHHHCCCCCCCCCCCCC-------------CC-CCEEEEEECCCCCCCCCHHHHHHHH
Q ss_conf 010318999999997799999998747971676688200-------------36-5317898247310113734567888
Q gi|254780153|r 264 KKMGGLSACVERCNANAAVLFQFIQENDWIENLAVDETT-------------RS-NTSICMKIVDSDIASLDINSQKSFC 329 (391)
Q Consensus 264 ~~~gGl~~~~~r~~~~a~~l~~~i~~~~~~~~~~~~~~~-------------rS-~~~v~~~~~d~~~~~~~~~~~~~~~ 329 (391)
T Consensus 246 R---TL~~Rm~~~qrnA~~Iv~yL~~~P~V~k~Y-yPgLpdH~GH~IA~~QQ~GFGAmlSFEL~G~~------~~v~~FL 315 (383)
T TIGR02080 246 R---TLAARMRSQQRNAQTIVEYLQTQPLVKKVY-YPGLPDHPGHEIAARQQKGFGAMLSFELKGGE------EAVRRFL 315 (383)
T ss_pred H---HHHHHHHHHHHHHHHHHHHHHCCCCEEEEE-CCCCCCCCCHHHHHHHCCCCCCEEEEEECCCH------HHHHHHH
T ss_conf 8---888888888788999999984489402633-58788866769998625654330233321886------8999998
Q ss_pred HHHHHHHHHCCEEECCCC------------CCC--------CC--CE-EEEECCCCCCHHHHHHHHHHHHHHHHH
Q ss_conf 999998886282872665------------567--------67--50-568615888999999999999999999
Q gi|254780153|r 330 KSMLSFLEKEEIAYDIGS------------YRD--------AP--LG-LRVWVGVTVEKEDLLLLCDWLRWVFYF 381 (391)
Q Consensus 330 ~~~~~~l~~~g~~~~~~~------------~r~--------~~--~~-~RIg~~g~i~~~dv~~L~~aLe~~~~~ 381 (391)
T Consensus 316 ~~L~LFt----LAESLGGVESLiaHPATMTH~aM~~eAR~~AGI~~~LLRlSvG----lED~~DLiaDL~~gl~a 382 (383)
T TIGR02080 316 GKLSLFT----LAESLGGVESLIAHPATMTHAAMGPEARAEAGISDTLLRLSVG----LEDADDLIADLDQGLQA 382 (383)
T ss_pred HHCCCHH----HHHHHCCHHHHHCHHHCCCCHHHHHHHHHHCCCCCCCCEEEEE----ECCHHHHHHHHHHHHHC
T ss_conf 4314012----1233155123333010126021018989745841142000210----03468899999999741