>TIGR01176 fum_red_Fp fumarate reductase, flavoprotein subunit; InterPro: IPR005884 In bacteria two distinct, membrane-bound, enzyme complexes are responsible for the interconversion of fumarate and succinate (1.3.99.1 from EC): fumaratereductase (Frd) is used in anaerobic growth, and succinate dehydrogenase (Sdh) is used in aerobic growth. Both complexes consist of two main components: a membrane-extrinsic component composed of a FAD-binding flavoprotein and an iron-sulphur protein; and an hydrophobic component composed of a membrane anchor protein and/or a cytochrome B. In eukaryotes mitochondrial succinate dehydrogenase (ubiquinone) (1.3.5.1 from EC) is an enzyme composed of two subunits: a FAD flavoprotein and and iron-sulphur protein. The flavoprotein subunit is a protein of about 60 to 70 Kd to which FAD is covalently bound to a histidine residue which is located in the N-terminal section of the protein . The sequence around that histidine is well conserved in Frd and Sdh from various bacterial and eukaryotic species . The terms succinate dehydrogenase and fumarate reductase may be used interchangeably in certain systems. However, a number of species have distinct complexes, with the fumarate reductase active under anaerobic conditions. This model represents the fumarate reductase flavoprotein subunit from several such species in which a distinct succinate dehydrogenase is also found. ; GO: 0016491 oxidoreductase activity, 0006118 electron transport, 0009061 anaerobic respiration.

Probab=90.48 E-value=0.4 Score=27.52 Aligned_cols=421 Identities=21% Similarity=0.231 Sum_probs=188.6 Q ss_pred CCCEEEECCCHHHHHHHHHHHHCC--CCEEEEE----CCHHHCCCCCCCCCCCC------------CCHHHHHHHHHHHH Q ss_conf 357889889426899999998589--9899998----07626012466700221------------12248999998630 Q gi|254780808|r 5 SYDVIVIGGGHAGCEAAAVAAKLG--ASTALIT----HKTSTIGSMSCNPAIGG------------LGKGHLVREIDALD 66 (626) Q Consensus 5 ~~dViVIGaG~AG~EAA~~~Ar~G--~~v~L~~----~~~~~~ael~Cnps~gg------------~akg~L~~Ei~aLg 66 (626) T Consensus 3 ~~~i~viGaGGAGLRaAIA~A~aNP~l~vAliSKVYPMRSHTVaAEGGsAAV~~D~DSld~H~~DTV~GGDWLC~QD~Ve 82 (585) T TIGR01176 3 QADIAVIGAGGAGLRAAIAAAEANPHLDVALISKVYPMRSHTVAAEGGSAAVTKDDDSLDEHFHDTVSGGDWLCEQDVVE 82 (585) T ss_pred CCCEEEECCCCHHHHHHHHHHHCCCCCCEEEEEECCCCCCCEECCCCCCEEECCCCCCHHHHCCCCCCCCCCCCCHHHHH T ss_conf 32367883784468999999840898537898511577641111355311210564124541445345664322021899 Q ss_pred HHHHHHHHHHHHHHHHHC--CCCCC----CC-----------CCHHHHHHHHHHHHH--HHHHHHCCCCCEEEHH-HHCC Q ss_conf 399999988631488730--78785----55-----------346787849999999--9999970899689800-1011 Q gi|254780808|r 67 GLMGRVADAAGIQFRVLN--VKKGP----AV-----------RGPRTQADRELYRLA--MQREILSQENLDVIQG-EVAG 126 (626) Q Consensus 67 g~m~~~aD~~~i~~r~ln--~skGp----Av-----------~alraqvDR~~fs~~--vt~~l~~~pni~i~~~-eV~~ 126 (626) T Consensus 83 ~FV~~ap~E-~~QlE~WGCPWSRk~dG~V~VR~FGGMK~~RTWF--A-ADKTGFH~LHTLFQ~~l~y~~i~R~DE~F~~~ 158 (585) T TIGR01176 83 YFVAEAPKE-LVQLEHWGCPWSRKPDGRVNVRRFGGMKVERTWF--A-ADKTGFHLLHTLFQTSLKYPQIKRYDEYFVVD 158 (585) T ss_pred HHHHHCCHH-HHHHHCCCCCCCCCCCCCEEEECCCCCCCCCEEE--C-CCCCCHHHHHHHHHHHCCCCCCEEHHCEEEEE T ss_conf 987413345-6643127888774789857762268812210010--1-12234268899998630563310001013555 Q ss_pred CCCCCCCEEEEE-----ECCCCCCCCCCCCCCCCCCCHHHHHHHHCCCCCCCCCCCCCCC--CCCHHHHHHHHCCCCCCC Q ss_conf 202588113222-----0358633445433346643101344432023322247511133--100001011200544445 Q gi|254780808|r 127 FNTEKNIISSIV-----MQDNSMIRCSTVVLTTGTFLRGVIHIGKLKIPAGRMGDSPSNS--LFNSFMKFDFDTGRLKTG 199 (626) Q Consensus 127 l~~~~~~~~~v~-----~~~g~~~~~~~viiatGtfl~g~~~~g~~~~~~gr~~~~~s~~--ls~~l~~~~~~~~r~ktg 199 (626) T Consensus 159 lLVDdG~v~GLvAi~~~~G~l~~I~A~aVvlaTGG--------------aGRVy~~~TN~~I~TGDGMa~A-----~~~G 219 (585) T TIGR01176 159 LLVDDGRVRGLVAIELAEGRLVTIKADAVVLATGG--------------AGRVYRFNTNGGIVTGDGMALA-----FRHG 219 (585) T ss_pred EEEECCEEEEEEEEEECCCEEEEEEEEEEEEECCC--------------CCCCEEECCCCCCCCCCHHHHH-----HHCC T ss_conf 57517735557888633670688874278993089--------------8730331058873126148999-----8478 Q ss_pred CCCHHHHCHHHHHHHHHCCCCCCCCCCCC--CCCCCCCCCCCCCCCCCCCCHHHHHH--HCCCCCC--CCCCCCCCCCCC Q ss_conf 44101100001344321147876687774--35657800000000123200147776--4024575--414432356422 Q gi|254780808|r 200 TPARLDGKTIIWDKTEKQFADERLIPFSF--MTDKITNRQIECGITRTNLETHRIIM--ENIKHSA--IYSGDIKSYGPR 273 (626) Q Consensus 200 tppri~~~sidf~~~e~q~~d~~~~~~s~--~~~~~~~~q~~~~~~~t~~~~~~~~~--~~~~~~~--~~~g~~~~~gpr 273 (626) T Consensus 220 ~PL-~DMEFVQY--------HPTGLP~tGIL~TE~~--R--~EGG~l~NK~GYRYLQDY~~G~~TP~G~Pk~k~MELGPR 286 (585) T TIGR01176 220 VPL-RDMEFVQY--------HPTGLPGTGILMTEGC--R--GEGGILVNKDGYRYLQDYGLGPETPLGEPKNKYMELGPR 286 (585) T ss_pred CCC-CCCCCEEE--------CCCCCCCCCHHCCCCC--C--CCCCEEECCCCCEEECCCCCCCCCCCCCCCCCCCCCCCC T ss_conf 883-32430100--------6889886521000334--4--377667816874130005777888888875342046886 Q ss_pred CCCC----CCCCCCCCCCCCCC-CCE--EEECCCCCCEEEECCCCCCCCHH-HHHHHHHHHHHHHHCCEEEECCHHHHCC Q ss_conf 2553----21233567643345-201--30157877645434776668988-9999998754340010011000121102 Q gi|254780808|r 274 YCPS----IEDKIVRFGERNGH-QIF--LEPEGLNTDVVYPNGISTALPEE-IQHQFIRTIPGLEKVNIIRPGYAIEYDY 345 (626) Q Consensus 274 ycPs----ie~k~~~~~~~p~h-~Vq--LrpE~~~~~~~n~vGFqTsL~~~-~Q~rv~r~IPGLEnAef~R~Gy~ieyd~ 345 (626) T Consensus 287 Dk~SQAF~HE~~KG~Ti~~P~GdVVyLDLRHLG~~-------~l~~~LPFi~ELak~Y~~vDPv~E~iPvRP~--vHY~M 357 (585) T TIGR01176 287 DKVSQAFWHEHRKGNTIDTPYGDVVYLDLRHLGED-------LLDERLPFICELAKAYVHVDPVKEPIPVRPT--VHYTM 357 (585) T ss_pred CCHHHHHHHHHHCCCCCCCCCCCEEEEEHHHHHHH-------HHHHCCCHHHHHHHHHCCCCCCCCCCCCCCC--EEEEE T ss_conf 53024457464178722589897788500442378-------8752073578998863266873245368860--24330 Q ss_pred CCHHHHHHHHHHHCCCEEEEEEEEECC----------CHHHHHHHHHHHHHHHHHHHCCCCCCCCCCCCCCHHHHHHHHH Q ss_conf 354565677654033415662133043----------3466666677899999874203345654653210799999988 Q gi|254780808|r 346 INPKELFPTLETKKISGLFLAGQINGT----------TGYEEAAAQGLVAGINSARKSNKLDCICFSRTDSYIGVMIDDL 415 (626) Q Consensus 346 ~~P~~L~~tLe~k~~~~LffAGQI~Gt----------eGYeEAAAqGl~AGiNa~~~~~~~~p~~l~R~eaYiGVlIDDL 415 (626) T Consensus 358 G-Gi~Td~~c~T~-~~GLfA~GE~asV~l~GANRLGSNSLaEl~VFG~~AG~~A~~~AA~~~~~~rGp~~A-i~AQ~--- 431 (585) T TIGR01176 358 G-GIETDINCETR-IKGLFAVGECASVGLHGANRLGSNSLAELVVFGRLAGEKAAERAARAKKSNRGPESA-IRAQA--- 431 (585) T ss_pred C-CEEECCCCCCC-CCCEEECCCCEEEECCCCCCCCCHHHHHHHHHHHHHHHHHHHHHHHHCCCCCCHHHH-HHHHH--- T ss_conf 6-54457876411-463344022013311353424300367899987766789999998623677787899-99999--- Q ss_pred HCCCCCCCHHHHHHHHHHHHHCCCCCHHHHHHHHHHHHCCCCH------HHHHHHHHHHHHHHHHHHHHHHCCCCCH Q ss_conf 6078774024420001221211578713668887877378838------9999999999999999998763368832 Q gi|254780808|r 416 TSKGVLEPYRMFTSRAEYRISLRPDNADNRLTPIGMKLGCIGE------RRQKRFAKYIQEYNFLRSLLKSLVLTSK 486 (626) Q Consensus 416 itkg~~EPYRMfTSRAEyRL~LR~DNAd~RLt~~g~~~GLv~~------~r~~~~~~k~~~~~~~~~~l~~~~~~p~ 486 (626) T Consensus 432 ---------~~~~~Rl~-~~~~~~G~GgE~~A~IR~~M~~t~E~~~GIYR~~~~~~~~i~~l~~L~ERf~~~~I~D~ 498 (585) T TIGR01176 432 ---------RTVELRLE-RLLSQEGQGGENWADIRAEMGATLESGCGIYRDEELLQKTIDKLAELQERFKRVGIDDK 498 (585) T ss_pred ---------HHHHHHHH-HHHHHCCCCCCHHHHHHHHHHHHHHHCCCCCCCHHHHHHHHHHHHHHHHHHCEEEEECC T ss_conf ---------99999999-99862588865166888999888985077446826799999999986542226656205

HHsearch alignment for GI: 254780808 and conserved domain: TIGR01176