HHsearch alignment for GI: 254780488 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=94.94  E-value=0.11  Score=31.48  Aligned_cols=294  Identities=13%  Similarity=0.248  Sum_probs=151.6

Q ss_pred             CCCCHHHHHHHHHHHHHHCCHHCCCCCCHHHHHHHHHHHHHCCCCCCCEEECCCCCCHHHHHHHHHHHCCCCCCCCCCEE
Q ss_conf             87899999999999985220102456897899999999972037864111026542025677776430013344332113
Q gi|254780488|r   55 GHRHPIIMNAIRSASENYDQIIFSEYTHEPAEQLARLLIKIAPLGLQYVFFSDSGSTSIEVALKMALGFFNNNNMPRNKI  134 (423)
Q Consensus        55 Gh~~~~i~~a~~~q~~~~~~~~~~~~~~~~~~~la~~l~~~~p~~~~~v~f~~SGsEA~e~Alklar~~~~~~~~~r~~i  134 (423)
T Consensus        36 gF~~PR~y----------DY-s--RsGNPTRd~l~~aLA~LE-~G~~-AVvT~~GMsAI~L~~~-~l------L~pdDLl   93 (383)
T TIGR02080        36 GFNEPRAY----------DY-S--RSGNPTRDILQQALAELE-GGAG-AVVTNSGMSAIDLVTT-AL------LGPDDLL   93 (383)
T ss_pred             CCCCCCCC----------CC-C--CCCCCCHHHHHHHHHHHH-CCCC-CEECCCHHHHHHHHHH-HE------ECCCCEE
T ss_conf             67779876----------66-8--898975658999999984-8998-2566856898876643-12------0789768


Q ss_pred             EEEECCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCEECCCCCCCCCCCCHHHHHCCCCCEEEEECCCCCCCCCCCCCCC
Q ss_conf             43202566532112343223333332223445421000122222221111012212775113431165543211222233
Q gi|254780488|r  135 VVMEHGYHGDTIGSMSVSMRGAFNNSYEPLLFDVETIPFPHHNEEQKTLDDLEKHCSTQKIAAFLVEPLILGAGGMQTYR  214 (423)
Q Consensus       135 i~~~~~yHG~t~~a~s~s~~~~~~~~~~p~~~~~~~i~~~~~~~~~~~l~~l~~~~~~~~iaavi~EP~i~~~gG~~~~~  214 (423)
T Consensus        94 vAPHDCYGGtY----RLl~~lA~kG~-----~~v~fV-------DQ~D~~al~~ALa~kdPKLVlIEt-P-SNPLlRVVD  155 (383)
T TIGR02080        94 VAPHDCYGGTY----RLLNALAKKGQ-----FKVQFV-------DQSDEQALEAALAQKDPKLVLIET-P-SNPLLRVVD  155 (383)
T ss_pred             EECCCCCCCHH----HHHHHHHHCCC-----EEEEEE-------ECCHHHHHHHHHHHCCCCEEEEEC-C-CCCCCHHHH
T ss_conf             80432677048----88864520783-----389986-------076289999999746984799867-9-988521888


Q ss_pred             CCCCCEEECCCCCCCCEECCCCCCCCCCCCCCCCCCCC-CCCCCCEE--ECCCCCCCCCCCC--CCCCCCHH-HHHHHCC
Q ss_conf             32110011011123420001221244445554311223-34444202--0134433222344--43322401-3210001
Q gi|254780488|r  215 PYILKEFMRITKKYDTLLIADEVMTGWGRTGKIFACNH-ADITPDIL--CLSKGITGGALPL--AATLCSEE-IFDSHLS  288 (423)
Q Consensus       215 ~~~l~~lr~lc~~~g~llI~DEV~tG~GRtG~~~a~~~-~gi~PDi~--~~gK~l~gG~~pi--sav~~~~~-i~~~~~~  288 (423)
T Consensus       156 ---I~~lc~La~~~G~~vvVDNTFL--sP-----~lQ~PL~LGAD~V~HS~TKYlN-GHSDVi~GaVIaKd~q~~e~L--  222 (383)
T TIGR02080       156 ---IAKLCKLAKAVGAVVVVDNTFL--SP-----ILQQPLSLGADLVIHSTTKYLN-GHSDVIAGAVIAKDPQLAEEL--  222 (383)
T ss_pred             ---HHHHHHHHHHCCEEEEEECCCC--CH-----HHCCCCCHHCCEEHHHHHCCCC-CCHHHHHHHHHCCCHHHHHHH--
T ss_conf             ---9999988761883899855216--77-----6727530111130111110003-403431212401471223443--


Q ss_pred             CCCC-CCCCCCCCCCCCCCC---HHHHHCCHH-HCCCCCCCCCCCCHHHHHHHHH--HH-----HHHCC--CEE--EECC
Q ss_conf             2222-222233333222210---011000000-0001123322210026789899--99-----75189--777--7745
Q gi|254780488|r  289 SDKK-KTFFHSSSYTANPIA---CAAALANLQ-IWEKEPVIERIKNLERMHADRL--SL-----LKSNK--KFV--NIRQ  352 (423)
Q Consensus       289 ~~~~-~~~~h~~T~~gnpl~---~aaa~a~L~-~i~~~~l~~~~~~~g~~l~~~l--~~-----L~~~~--~v~--~vrG  352 (423)
T Consensus       223 -~WW~N~l--G~t--G~aFDSY~tLRGlRTL~~Rm~~~--qrnA~~Iv~yL~~~P~V~k~YyPgLpdH~GH~IA~~QQ~G  295 (383)
T TIGR02080       223 -AWWANAL--GVT--GGAFDSYLTLRGLRTLAARMRSQ--QRNAQTIVEYLQTQPLVKKVYYPGLPDHPGHEIAARQQKG  295 (383)
T ss_pred             -HHHHHCC--CCC--CCHHHHHHHHHHHHHHHHHHHHH--HHHHHHHHHHHHCCCCEEEEECCCCCCCCCHHHHHHHCCC
T ss_conf             -3343002--554--44346889986788888888888--7889999999844894026335878886676999862565


Q ss_pred             CCCEEEEEECCCCCCCCCHHHHHHHHHHHH----------CCE---EEEEC---------------C---CEEEECCCCC
Q ss_conf             533999997068766641068999999997----------885---99951---------------9---9899568987
Q gi|254780488|r  353 MGTIVALDFNVQNKGYFFDKNAKLKNFFRE----------KKI---LIRPL---------------G---HIMYLMPPYC  401 (423)
Q Consensus       353 ~Gl~~~iel~~~~~~~~~~~~~~l~~~l~~----------~Gi---l~~~~---------------g---n~i~l~Ppl~  401 (423)
T Consensus       296 FGAmlSFEL~G~~--------~~v~~FL~~L~LFtLAESLGGVESLiaHPATMTH~aM~~eAR~~AGI~~~LLRlS----  363 (383)
T TIGR02080       296 FGAMLSFELKGGE--------EAVRRFLGKLSLFTLAESLGGVESLIAHPATMTHAAMGPEARAEAGISDTLLRLS----  363 (383)
T ss_pred             CCCEEEEEECCCH--------HHHHHHHHHCCCHHHHHHHCCHHHHHCHHHCCCCHHHHHHHHHHCCCCCCCCEEE----
T ss_conf             4330233321886--------8999998431401212331551233330101260210189897458411420002----


Q ss_pred             CCHHHHHHHHHHHHHHHHH
Q ss_conf             8799999999999999987
Q gi|254780488|r  402 ITATDLDHIYNTINEAVDF  420 (423)
Q Consensus       402 it~~eId~~l~~l~~aL~~  420 (423)
T Consensus       364 vGlED~~DLiaDL~~gl~a  382 (383)
T TIGR02080       364 VGLEDADDLIADLDQGLQA  382 (383)
T ss_pred             EEECCHHHHHHHHHHHHHC
T ss_conf             1003468899999999741