HHsearch alignment for GI: 254780604 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=99.29 E-value=8.5e-10 Score=82.93 Aligned_cols=276 Identities=20% Similarity=0.290 Sum_probs=165.8
Q ss_pred HHHHHHHHCCCCCEEEEECCCCCHHHHHCCCCCCCCCEEEEHHHHHHHH---HHHH-HHHCCCCEEEECCCCHHHHHHHH
Q ss_conf 9998887349973377405652012220234677887234213211167---5201-45316513531679988988867
Q gi|254780604|r 95 LEKELATLHGKKAALIFNSGYIANWATIGTLCSQIDNIICFSDSHNHAS---IIEG-INKARCKKVIWNHNDLEDLEKNL 170 (401)
Q Consensus 95 LE~~la~~~g~e~al~~~SG~~An~~~i~~l~~~~d~ii~~~D~~~HaS---i~~g-~~l~~a~~~~f~HnD~~~Le~~L 170 (401)
T Consensus 56 l~~aLA~LE~G~~AVvT~~GMsAI~L~~~~lL~pdDLlvAPHD--CYGGtYRLl~~lA~kG~~~v~fVDQ~D~~al~~AL 133 (383)
T TIGR02080 56 LQQALAELEGGAGAVVTNSGMSAIDLVTTALLGPDDLLVAPHD--CYGGTYRLLNALAKKGQFKVQFVDQSDEQALEAAL 133 (383)
T ss_pred HHHHHHHHHCCCCCEECCCHHHHHHHHHHHEECCCCEEEECCC--CCCCHHHHHHHHHHCCCEEEEEEECCHHHHHHHHH
T ss_conf 9999999848998256685689887664312078976880432--67704888864520783389986076289999999
Q ss_pred HHCCCCCCCEEECCCCC-CCCCCHHHHHHHHHHHHCCCCEEEECCCCCCCCCCCHHHHHHHHHHCCCCCCHHHCCCCCCC
Q ss_conf 40663356236216743-56773368999999840147189971211001256025899999720200101101444322
Q gi|254780604|r 171 AATDLSIPKIIIFESIY-SMDGDIAPIKEICDLADQYNAITYIDEVHAVGIHGSCGAGISEREGIMNRITIISGTLAKGF 249 (401)
Q Consensus 171 ~~~~~~~~~iIv~e~v~-Sm~G~~apL~~l~~l~~~~~~~LivDEAH~~Gv~G~~G~G~~~~~g~~~~~di~~~TlsKa~ 249 (401)
T Consensus 134 a~kd---PKLVlIEtPSNPLl-RVVDI~~lc~La~~~G~~vvVDNTF----LsP-----~lQ~PL~LGAD~V~HS~TKYl 200 (383)
T TIGR02080 134 AQKD---PKLVLIETPSNPLL-RVVDIAKLCKLAKAVGAVVVVDNTF----LSP-----ILQQPLSLGADLVIHSTTKYL 200 (383)
T ss_pred HHCC---CCEEEEECCCCCCC-HHHHHHHHHHHHHHCCEEEEEECCC----CCH-----HHCCCCCHHCCEEHHHHHCCC
T ss_conf 7469---84799867998852-1888999998876188389985521----677-----672753011113011111000
Q ss_pred -CC---CEE-EEECCHHHHHHHHCCCCCCCCCCCCCCHHHHHHHHHHHHHHCCHHHHHHHHHHHHHHHHHHHHC------
Q ss_conf -22---316-8754844500000133222333444431478899876432012016888899998766656644------
Q gi|254780604|r 250 -GT---FGG-YIAASENLCDFIRSFASGFIFSTSLPPAIASASVTSIQYIKQHYDERKKYLERVKQLRHSLENK------ 318 (401)
Q Consensus 250 -g~---~GG-~i~g~~~~~~~l~~~~~~~ifs~~l~p~~~aa~~~al~~l~~~~~~~~~l~~~~~~l~~~L~~~------ 318 (401)
T Consensus 201 NGHSDVi~GaVIaKd~q~~e~L~WW~N~l-G~tG-~aFDSY~tLRGlRTL---~~Rm~~~qrnA~~Iv~yL~~~P~V~k~ 275 (383)
T TIGR02080 201 NGHSDVIAGAVIAKDPQLAEELAWWANAL-GVTG-GAFDSYLTLRGLRTL---AARMRSQQRNAQTIVEYLQTQPLVKKV 275 (383)
T ss_pred CCCHHHHHHHHHCCCHHHHHHHHHHHHCC-CCCC-CHHHHHHHHHHHHHH---HHHHHHHHHHHHHHHHHHHCCCCEEEE
T ss_conf 34034312124014712234433343002-5544-434688998678888---888888878899999998448940263
Q ss_pred CCCCCC-------------CCCCEEEEEE-CCHHHHHHHHHHH----HHH-C-CEEEEEECCCCCC--------------
Q ss_conf 983037-------------8986599996-8979999999999----973-7-9099840488888--------------
Q gi|254780604|r 319 AIPCIP-------------NESHIIPIMV-GDSHKCTQISNIL----LKE-F-GIYIQPINYPTVA-------------- 364 (401)
Q Consensus 319 g~~~~~-------------~~s~Ivpi~~-g~~~~~~~~~~~l----L~e-~-Gi~v~~i~~PtVp-------------- 364 (401)
T Consensus 276 YyPgLpdH~GH~IA~~QQ~GFGAmlSFEL~G~~~~v~~FL~~L~LFtLAESLGGVE-SLiaHPATMTH~aM~~eAR~~AG 354 (383)
T TIGR02080 276 YYPGLPDHPGHEIAARQQKGFGAMLSFELKGGEEAVRRFLGKLSLFTLAESLGGVE-SLIAHPATMTHAAMGPEARAEAG 354 (383)
T ss_pred ECCCCCCCCCHHHHHHHCCCCCCEEEEEECCCHHHHHHHHHHCCCHHHHHHHCCHH-HHHCHHHCCCCHHHHHHHHHHCC
T ss_conf 35878886676999862565433023332188689999984314012123315512-33330101260210189897458
Q ss_pred CCCCEEEEECCCCCCHHHHHHHHHHHHHHHH
Q ss_conf 8872189961857999999999999999999
Q gi|254780604|r 365 KKKERLRVTLTPLHTDSDIEHLVSSLENVWQ 395 (401)
Q Consensus 365 ~g~~rlRi~l~a~ht~edid~~~~~l~~v~~ 395 (401)
T Consensus 355 I~~~LLRlSvGl----ED~~DLiaDL~~gl~ 381 (383)
T TIGR02080 355 ISDTLLRLSVGL----EDADDLIADLDQGLQ 381 (383)
T ss_pred CCCCCCEEEEEE----CCHHHHHHHHHHHHH
T ss_conf 411420002100----346889999999974