HHsearch alignment for GI: 254780349 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=99.34 E-value=6.6e-12 Score=103.40 Aligned_cols=291 Identities=21% Similarity=0.235 Sum_probs=177.1
Q ss_pred HHHHCCCCCEECCCHHHHHHHHHHHHHHHCCCCEEEECCCCCCCCCCCCCCCCCC--CCCCCCCCCCCCCCCCCCCHHHH
Q ss_conf 9987188630100001679999999983154874881233448411147665433--33322013665832356598999
Q gi|254780349|r 88 AKKLFNVNFVNVQSHSGSQMNQGVFLALMHPGDSFMGLSLDSGGHLTHGSSVNMS--GKWFKAIPYNVRKEDGLLDMHEI 165 (433)
Q Consensus 88 a~~lF~a~~anvqp~SG~~An~av~~ALl~pGD~Il~~~l~~GGHlshg~~~~~~--g~~~~~~~y~~d~~~~~ID~d~~ 165 (433)
T Consensus 60 LA~LE~G~~AVvT~-~GMsAI~L~~~~lL~pdDLlvAPHDCYGGtY---RLl~~lA~kG~~~v~f--VDQ----~D~~al 129 (383)
T TIGR02080 60 LAELEGGAGAVVTN-SGMSAIDLVTTALLGPDDLLVAPHDCYGGTY---RLLNALAKKGQFKVQF--VDQ----SDEQAL 129 (383)
T ss_pred HHHHHCCCCCEECC-CHHHHHHHHHHHEECCCCEEEECCCCCCCHH---HHHHHHHHCCCEEEEE--EEC----CHHHHH
T ss_conf 99984899825668-5689887664312078976880432677048---8886452078338998--607----628999
Q ss_pred HHHHHHHC-CCEEEEECCCCC--CCCCHHHHHHHHHHCCCEEEECCCCHHHHHHHHCCCCCCCC-CCEEEECCCCCCCCC
Q ss_conf 99998604-667897055243--53637999988641797899186201244320001232200-235674045652256
Q gi|254780349|r 166 ESLAIEYN-PKLIIVGGTAYS--RVWDWERFRSIADSIGAYLMADISHISGLVVGGQHPSPVPH-CHIVTTTTHKSLRGP 241 (433)
Q Consensus 166 ~~~a~~~k-PklIi~G~S~y~--~~~d~~~l~eIa~~~ga~l~~D~aH~~GLIa~g~~~~Pl~~-ADvvt~sTHKtl~GP 241 (433)
T Consensus 130 ~~-ALa~kdPKLVlIEtPSNPLlRVVDI~~lc~La~~~G~~vvVDNTFL-----sP~lQ~PL~LGAD~V~HS~TKYlNGH 203 (383)
T TIGR02080 130 EA-ALAQKDPKLVLIETPSNPLLRVVDIAKLCKLAKAVGAVVVVDNTFL-----SPILQQPLSLGADLVIHSTTKYLNGH 203 (383)
T ss_pred HH-HHHHCCCCEEEEECCCCCCCHHHHHHHHHHHHHHCCEEEEEECCCC-----CHHHCCCCCHHCCEEHHHHHCCCCCC
T ss_conf 99-9974698479986799885218889999988761883899855216-----77672753011113011111000340
Q ss_pred C---CEEEEECCCCHHHHCCHH-HCHHHHHHHHHHHHHHHHHHHHHHHCHHHHHHHHHHHHHHHHHHHHHHHCCCCCCC-
Q ss_conf 7---448983362056501664-65432234455666899999999735648999999998889999998616852334-
Q gi|254780349|r 242 R---GGLIMTNHADLAKKINSA-IFPGLQGGPFMHSIAAKAVAFGEALSSEFRDYAKQIVLNSQALAKKLQFLGFDIVS- 316 (433)
Q Consensus 242 r---gGiI~~~~~e~~~~i~~a-vfPg~qg~~~~~~iaa~aval~Ea~~~~f~~Ya~qvv~NA~~La~~L~~~G~~vv~- 316 (433)
T Consensus 204 SDVi~GaVIaKd~q~~e~L~WW~N~lG~tG~aFDSY-----~tLRGlRT--L~~Rm~~~qrnA~~Iv~yL~~~P--~V~k 274 (383)
T TIGR02080 204 SDVIAGAVIAKDPQLAEELAWWANALGVTGGAFDSY-----LTLRGLRT--LAARMRSQQRNAQTIVEYLQTQP--LVKK 274 (383)
T ss_pred HHHHHHHHHCCCHHHHHHHHHHHHCCCCCCCHHHHH-----HHHHHHHH--HHHHHHHHHHHHHHHHHHHHCCC--CEEE
T ss_conf 343121240147122344333430025544434688-----99867888--88888888788999999984489--4026
Q ss_pred ---CC---CCCCEEEEC-------CCCCCCCHHH--HHHHHHHCCEEEECCCCCCCCCC-CCCCCCCCCCCHHHHHCCCC
Q ss_conf ---58---889812631-------6655676799--99988856718803789989999-88898512246667307999
Q gi|254780349|r 317 ---GG---TDNHLMLVD-------LRSKRMTGKR--AESILGRVSITCNKNSIPFDPES-PFITSGIRLGTPSGTTRGFK 380 (433)
Q Consensus 317 ---gg---Td~H~vlvd-------l~~~~~~G~~--a~~~Le~~gI~~Nkn~iP~D~~~-~~~~sGiRlGT~aiTtrG~~ 380 (433)
T Consensus 275 ~YyPgLpdH~GH~IA~~QQ~GFGAmlSFEL~G~~~~v~~FL~~L~LFtLA-------ESLGGVESLi-aHPATMTH~aM~ 346 (383)
T TIGR02080 275 VYYPGLPDHPGHEIAARQQKGFGAMLSFELKGGEEAVRRFLGKLSLFTLA-------ESLGGVESLI-AHPATMTHAAMG 346 (383)
T ss_pred EECCCCCCCCCHHHHHHHCCCCCCEEEEEECCCHHHHHHHHHHCCCHHHH-------HHHCCHHHHH-CHHHCCCCHHHH
T ss_conf 33587888667699986256543302333218868999998431401212-------3315512333-301012602101
Q ss_pred HHHHHHHHHHHHHHHHCCCCCCCHHHHHHHHH
Q ss_conf 89999999999999602577621179999999
Q gi|254780349|r 381 EKDFEYIGELIAQILDGSSSDEENHSLELTVL 412 (433)
Q Consensus 381 e~em~~iA~li~~~L~~~~~~~~~~~~~~~ir 412 (433)
T Consensus 347 ~e-AR~~AGI~~~LLRlSvGlED~~DLiaDL~ 377 (383)
T TIGR02080 347 PE-ARAEAGISDTLLRLSVGLEDADDLIADLD 377 (383)
T ss_pred HH-HHHHCCCCCCCCEEEEEECCHHHHHHHHH
T ss_conf 89-89745841142000210034688999999