>TIGR01580 narG nitrate reductase, alpha subunit; InterPro: IPR006468 The nitrate reductase enzyme complex allows bacteria to use nitrate as an electron acceptor during anaerobic growth. The enzyme complex is a heterotrimer consisting of alpha, beta and gamma subunits . The alpha subunit contains a molybdenum cofactor, the beta subunit contains [Fe-S] clusters while the gamma subunit contains haeme and is membrane bound. The alpha and beta subunits form a membrane extrinsic catalytic dimer which is bound to the membrane by the gamma subunit, which is a b-type cytochrome that receives electrons from the quinone pool and transfers them to the beta subunit. The three subunits form a stable "flower"-shaped structure , where the gamma subunit anchors the alpha and beta subunits to the membrane through predominantly hydrophobic interactions. The structure is further stabilised by the presence of a phosphatidylglycerol molecule that is bound by all three subunits. The alpha subunit uses a Mo-bisMGD cofactor for catalytic activity and, like other proteins that bind this cofactor, forms four alpha-beta domains grouped around the cofactor. Interaction with the other catalytic subunit occurs along an extensive, buried interface.; GO: 0008940 nitrate reductase activity, 0042126 nitrate metabolic process, 0009325 nitrate reductase complex.

Probab=99.90 E-value=7.4e-23 Score=184.09 Aligned_cols=385 Identities=19% Similarity=0.207 Sum_probs=239.3 Q ss_pred CCCCCCCEEEEEECC-CCCCCCCEEEEECCCCEEEEEEC-------CCCCCCCCCEECCCCCCCCC-HHH-HCCCCHHHE Q ss_conf 334443023522012-11688643667515999988524-------78887777411355422100-000-000110110 Q gi|254780859|r 220 FTGRSWELTKTDSID-VMDALGSAIRIDARGCEVMRILP-------RINESINEEWISDKTRFIWD-GLK-VQRLDCPYA 289 (700) Q Consensus 220 ~~~Rpwel~~~~SvC-~~C~~GC~i~v~v~~g~i~rv~~-------~~~~~vN~g~lC~KGRf~~d-~~~-~dRL~~Pli 289 (700) T Consensus 35 YR~RWQy~KiVRSTHGVNCTGSCSW~IYVKNGlvTWE~Q~~~YP~T~~DlP~~EPRGCPRGA-SySWYiYSa~RlKYP~~ 113 (1248) T TIGR01580 35 YRNRWQYDKIVRSTHGVNCTGSCSWKIYVKNGLVTWETQQTDYPRTRPDLPNHEPRGCPRGA-SYSWYIYSANRLKYPKV 113 (1248) T ss_pred CCCCCCCCCEEECCCCCCCCCCCEEEEEEECCEEECCCCCCCCCCCCCCCCCCCCCCCCCCC-CHHHHHHHHHHCCCHHH T ss_conf 13433203357405761455421024687355574135457878787776777767788876-22554431201357144 Q ss_pred ECC--------------------------------------CCEEECCHHHHHHHHHHHHCCCCCCEEE--E--ECCC-- Q ss_conf 022--------------------------------------2202324145668887520134453147--8--5043-- Q gi|254780859|r 290 RIN--------------------------------------GRLKPVSWDYALKAIKSAVLSSDVKLGA--V--VGDL-- 325 (700) Q Consensus 290 R~~--------------------------------------g~~~~iSWdeAl~~ia~~L~~~~~~~g~--~--~g~~-- 325 (700) T Consensus 114 R~~L~~lWREA~~~~~~P~EAW~SIvE~~~KA~SyK~~RG~GGFvRs~W~EV~~lIaAs~~YTv~~yGPDR~vGFSPIPA 193 (1248) T TIGR01580 114 RKVLLKLWREAKQTHQDPVEAWASIVENKEKAKSYKQARGKGGFVRSSWEEVNELIAASNVYTVKKYGPDRVVGFSPIPA 193 (1248) T ss_pred HHHHHHHHHHHHHHCCCHHHHHHHHCCCHHHHHHHHHCCCCCCEEECCHHHHHHHHHHHHHHHHHHCCCCCCCCCCCCCH T ss_conf 47999988999873237047777541685665688842798641436759999999888777775438886456678606 Q ss_pred CCCHHHHHH-HHHHHHCCCCCEECCCCCCCCCHHHHCCCCCCC--CCHHHHHCCCEEEEECCCCCCCCCCHHHHHHHHHH Q ss_conf 232355547-889863687724202334446643401254677--87877401857999738532257310257789997 Q gi|254780859|r 326 SSVEEIYAL-KLLMQSLGCENFDCRQNGEYLDPSYGRASYIFN--PTIQGIEEADAMLIIGSNPRLEAAVLNARIRKRWR 402 (700) Q Consensus 326 ~t~Ee~y~~-k~l~~~lGt~nid~~~~~~~~~~~~~~~~~~~~--~~i~die~ad~illiG~Np~~~~Pvl~~rirka~~ 402 (700) T Consensus 194 MSMvS-yAsGsRylSLIGG~~LSFYDWY~DLPPASP~~WG~QTDVPESaDWYNS~YIIaWGSNVP~TRTPDAHF~~E~RY 272 (1248) T TIGR01580 194 MSMVS-YASGSRYLSLIGGVCLSFYDWYCDLPPASPQIWGEQTDVPESADWYNSGYIIAWGSNVPQTRTPDAHFFTEVRY 272 (1248) T ss_pred HHHHH-HHHHHHHHHHHCCCHHHHHHHHCCCCCCCCCCCCCCCCCCCCCCHHCCCCEEECCCCCCCCCCCCHHHHHHHEE T ss_conf 78987-76444666763221120222211675787766676568887411005775687167888888885022210111 Q ss_pred CCCCEEECCCCCHHHH---HHHHCCCCCH--------------------------------------------------- Q ss_conf 5997066168501223---3443048986--------------------------------------------------- Q gi|254780859|r 403 RGNFPIAVIGDVGELR---YKYEHLGNGS--------------------------------------------------- 428 (700) Q Consensus 403 ~g~~~I~vi~~~~~l~---~~~~~l~~~~--------------------------------------------------- 428 (700) T Consensus 273 KG~K~vai~PDyaE~aKl~D~WL~~kQGTDaAlA~A~gHVil~EF~l~~~~~~F~eY~k~YTD~P~LV~L~p~lga~~~g 352 (1248) T TIGR01580 273 KGTKTVAITPDYAEVAKLADLWLSPKQGTDAALALAMGHVILKEFHLDKPSEYFTEYAKRYTDLPVLVMLEPMLGAKEDG 352 (1248) T ss_pred CCCEEEEECCCHHHHHHHHHHHCCCCCCCHHHHHHHHCCCEEEEEECCCCHHHHHHHHHHHCCCCHHHHCCHHHCCCCCC T ss_conf 46237984587677777764312645675699999732211100103771468999988743884020001333236677 Q ss_pred -------------------------------------------------------------------------------- Q ss_conf -------------------------------------------------------------------------------- Q gi|254780859|r 429 -------------------------------------------------------------------------------- 428 (700) Q Consensus 429 -------------------------------------------------------------------------------- 428 (700) T Consensus 353 ~Y~agR~L~A~Dl~D~~G~~~~~~WK~~~~d~~~s~~~~P~G~~G~RW~~~~KWNl~~~d~~~G~~iel~LSllG~~Dei 432 (1248) T TIGR01580 353 VYTAGRFLRAKDLGDALGQENNPEWKTVALDEQGSELVIPQGSIGYRWGEKGKWNLEQRDGETGEEIELRLSLLGIEDEI 432 (1248) T ss_pred CCCCCCCEEHHHHHHHCCCCCCCCCCEEEECCCCCEEECCCCCEEEEECCCCCCCCCCCCCCCCCCCCCEEEEECCCCCE T ss_conf 30633100032334430566786524244316775353468840013378652024223588885014324553254450 Q ss_pred ------------------------------------------------------------------------------HH Q ss_conf ------------------------------------------------------------------------------78 Q gi|254780859|r 429 ------------------------------------------------------------------------------EA 430 (700) Q Consensus 429 ------------------------------------------------------------------------------e~ 430 (700) T Consensus 433 a~V~~PYF~~d~~e~F~~v~g~~Vl~r~lPvk~~~L~DG~~a~vtTVfDL~lANyg~~RGlg~~n~A~~YDD~~~~gTPA 512 (1248) T TIGR01580 433 AEVRFPYFSGDATEYFQKVEGEKVLLRKLPVKKLNLADGSEALVTTVFDLILANYGVERGLGERNSAVSYDDAEAFGTPA 512 (1248) T ss_pred EEEECCCCCCCHHHHHHHHHHHHHHHHCCCEEEEEECCCCEEEEHHHHHHHHHHHHHHCCCCCCCCCCCCCCCCCCCCCC T ss_conf 14635410561578876641100010048802676168873454056678888767652778644313356778888885 Q ss_pred HHHHHCCCC-----HHHHHHHH-----CCCCHHHHHHHHHHCCCCHHHHHHHHHHHHHHHCCCCCCCCCC------CCCC Q ss_conf 888826877-----88999872-----3531023544332104746989898999887410585334754------2467 Q gi|254780859|r 431 LADLVSGQH-----PFFKKLQE-----ATRPLIIVGQGALRASDNVEVMANIAKLVIDVGGISDSWNGFA------VLHT 494 (700) Q Consensus 431 l~~~~~g~~-----~~~~~l~~-----a~~~~ii~G~g~~~~~~g~~~~~al~~l~~~~G~ig~~g~G~~------~L~~ 494 (700) T Consensus 513 W~EQ~TGv~~~~~i~IAREFA~NA~~T~GRSMIIVGAg~NHWy~~D~~YRgl~N~l~l~G~~G~~GGGWAHYVGQEKLRP 592 (1248) T TIGR01580 513 WQEQITGVSREKVIKIAREFADNADKTDGRSMIIVGAGLNHWYHLDMNYRGLINLLLLCGCVGQNGGGWAHYVGQEKLRP 592 (1248) T ss_pred HHHHHCCCCHHHHHHHHHHHHHHHCCCCCCEEEEECCCHHHHHHHHHHHHHHHHHHHHHCCCCCCCCCEEEEECCCCCCC T ss_conf 25450453578999998887520013688668997350334565225789999999885250558984266506544575 Q ss_pred CC------------------C---------CC------------------------------CCHHCCCCCCCCCCCHH- Q ss_conf 53------------------1---------04------------------------------52101776586523688- Q gi|254780859|r 495 VA------------------S---------RV------------------------------GALDLGFVPADDTINAM- 516 (700) Q Consensus 495 ~~------------------n---------~~------------------------------Ga~d~g~~P~~~~~~~~- 516 (700) T Consensus 593 ~~GW~~lA~a~DW~~~p~~~NgTSfFY~~~~QWRyE~~~~~dl~SP~A~~Sry~~H~~DyNv~A~R~GWLPS~P~ln~Np 672 (1248) T TIGR01580 593 QEGWQPLAFALDWERPPRLMNGTSFFYFHSSQWRYEDVSIEDLLSPLADKSRYTKHLLDYNVRAERLGWLPSAPQLNTNP 672 (1248) T ss_pred CCCCHHHHHHHCCCCCCCCCCCCEEEECCCCCCCCCCCCHHHHHCCHHHHCCCCCCCCCHHHHHHHCCCCCCCCCCCCCH T ss_conf 35631233100245441002661344257553301356578851301221157664211235776425778878667763 Q ss_pred -HH----------------------HHC----------------CCEEEECCCCHH------------------------ Q ss_conf -88----------------------601----------------675998076422------------------------ Q gi|254780859|r 517 -NI----------------------LDK----------------TDIVFLLGADEL------------------------ 533 (700) Q Consensus 517 -~~----------------------~~~----------------~~~l~~~g~d~l------------------------ 533 (700) T Consensus 673 l~~~~eA~~AG~~~~~dvGaYv~~~L~e~~l~FA~E~Pd~~~NfPRNlFiWRsNLl~SSGKGHEy~LKyLLGT~~G~~n~ 752 (1248) T TIGR01580 673 LDIAKEAEKAGMEPKDDVGAYVVKSLQEGSLRFAIEQPDNEVNFPRNLFIWRSNLLGSSGKGHEYMLKYLLGTKNGLMND 752 (1248) T ss_pred HHHHHHHHHHCCCCCCHHHHHHHHHHCCCCEEEECCCCCCCCCCCCHHHHHHHHHHCCCCCCHHHHHHHHHCCCCCCCCC T ss_conf 58899999817787102000101000168424420278888888720476556553167720889999871445675655 Q ss_pred -------------H-----CCCCCCEEEHHHHHHHHHHHHCCEEECCCCCCCCCCEEE-EECCEEEEECCCCCCCCCCCH Q ss_conf -------------0-----166543450221166668874557704786202472088-208867420443288555740 Q gi|254780859|r 534 -------------D-----FSDKQALTVYIGSHGDRGAQSADVILPGAAYTEKSGLWV-NTEGRVQMGMRAIFPPGDAKE 594 (700) Q Consensus 534 -------------~-----~~~~~~fvV~~d~~~t~tA~~ADVVLP~a~~~Ek~Gtf~-N~EgRvQ~~~~av~p~geak~ 594 (700) T Consensus 753 D~G~~~~~kP~E~~W~~~g~~GKLDL~~~LDFR~ssT~lYSDIvLP~ATWYEK~D~~~~DMHPFIHPlsaAi~~aWEskS 832 (1248) T TIGR01580 753 DLGQQDSIKPEEIEWRDEGAEGKLDLVITLDFRMSSTCLYSDIVLPTATWYEKDDLNTSDMHPFIHPLSAAIDPAWESKS 832 (1248) T ss_pred CCCCCCCCCCCCCCHHCCCCCCCEEEEEHHHHHHHHHHHHHHHHCCCCCCCCCCCCCCCCCCCCCCCCHHHCCCCCCCCC T ss_conf 56778850442013200567773210010023455456554301246654100267756788552552133576424566 Q ss_pred HHHHHHHHHHHH Q ss_conf 799999999980 Q gi|254780859|r 595 DWEIICALADEL 606 (700) Q Consensus 595 dw~Il~~La~~L 606 (700) T Consensus 833 DW~IyKa~aK~~ 844 (1248) T TIGR01580 833 DWEIYKAIAKAF 844 (1248) T ss_pred HHHHHHHHHHHH T ss_conf 078999999888

HHsearch alignment for GI: 254780859 and conserved domain: TIGR01580