>TIGR01817 nifA Nif-specific regulatory protein; InterPro: IPR010113 This entry represents NifA, a DNA-binding regulatory protein for nitrogen fixation. Not included in this group are: the homologue in Aquifex aeolicus (which lacks nitrogenase), transcriptional activators of alternative nitrogenases (VFe or FeFe instead of MoFe), and truncated forms. In diazotrophic proteobacteria, the sigma54-dependent activator NifA activates transcription of the nif (nitrogen fixation) genes by a conserved mechanism common to members of the enhancer binding protein family. Although NifA proteins have similar domain structures, both transcriptional regulation of nifA expression and posttranslational regulation of NifA activity by oxygen and fixed nitrogen vary significantly from one organism to another. In Klebsiella pneumoniae and Azotobacter vinelandii, nifA is co-ordinately transcribed with a second gene, nifL, whose product inhibits NifA activity in response to oxygen and fixed nitrogen .; GO: 0003677 DNA binding, 0016563 transcription activator activity, 0009399 nitrogen fixation.

Probab=100.00 E-value=0 Score=782.72 Aligned_cols=464 Identities=24% Similarity=0.314 Sum_probs=341.1 Q ss_pred EEEECCCHHHHHHHHHHHHHCCCE------E-EEECCHHHHHHHCCCCCEEEEECCCCCCCHHHHHHHHH--HHCCC--- Q ss_conf 899869989999999999988988------9-99893799998608998999978546988899999999--85789--- Q gi|254780916|r 13 VLIIDKDDEQIKIIKDHVESYGYD------V-FIVNVSDLSTISKIQVNVIFLSLINCEDDKENILKNIV--DKIPI--- 80 (482) Q Consensus 13 ILIVDDd~~~~~~l~~~L~~~G~~------v-~~a~~~al~~l~~~~~dlillD~~mP~~dGlell~~i~--~~~p~--- 80 (482) T Consensus 42 i~l~d~ege~~~~~a~~~~~e~~~~lg~~~~ry~vgeg~ig~i~~~G~~lVv~~va~~~----lF~d~~~~~l~~~~e~~ 117 (574) T TIGR01817 42 ISLSDSEGEPLLVAAIGWSEEEFAQLGSDDIRYRVGEGAIGQIVATGNSLVVPDVAAEP----LFLDRLSEVLSDPGEIP 117 (574) T ss_pred EEEECCCCCCEEEEEEECCCCCCCCCCCCCCEECCCCCHHHHHHHCCCEEEECCCCCCH----HHHHHHHHHHCCCCCEE T ss_conf 89867888601101430386101123468850247340235663168706604667353----45776455405887431 Q ss_pred CCEEEEECC-CCHHH----HHHHHHCCCCCC-CCCCCCCCCCCC-CCCCCCC------------------------CC-- Q ss_conf 839999268-99999----998885057432-222222222222-2222222------------------------22-- Q gi|254780916|r 81 VPIIVQTTQ-DNIKI----LNCFLYNRISKF-FLNLVSRKQLCD-SIICALR------------------------EG-- 127 (482) Q Consensus 81 ipvIiiT~~-~~~~~----~~~a~~~g~~d~-l~KP~~~~~L~~-~i~~al~------------------------~~-- 127 (482) T Consensus 118 ~~FIgVPi~~~d~~~~GvL~~~r~~~g~~~~~~~~~vRFL~mVANL~gQtvRL~r~~~~~~~~~~~e~~~~~~~~~~~~s 197 (574) T TIGR01817 118 VPFIGVPIKNADSETIGVLAIDRIKEGASRERLEEEVRFLEMVANLIGQTVRLHRLVAARRERLIAEAAQLSKQLRDKKS 197 (574) T ss_pred CCEEECCCCCCCCCCCEEEEEEECCCCCCCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCC T ss_conf 11340226677777112267720688884134614543799999999878887445654201105567778875214001 Q ss_pred --CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCEEEEEECCCCCHHHHHHHHHHHCCCCCCCCCCCCCCCCCCCC Q ss_conf --222222211111111222222222222222234432048873277743679999998426754332101234655421 Q gi|254780916|r 128 --VVPSQENEHCALDSLIAVSPAMIQVVDLARKAGDCAIPIMIQGEFGVGKKRLSRFIHESGKRAFFPFFIVNCGMIDQD 205 (482) Q Consensus 128 --~~~~~~~~~~~~~~LiG~S~~m~~v~~~i~~~a~~~~~vli~Ge~GtGK~~~A~~iH~~s~r~~~~fi~v~c~~~~~~ 205 (482) T Consensus 198 Ga~~~~~~~~~~~~~~i~G~Spam~~v~~~~~~vA~~nSTVLlRGESGTGKEl~A~AIH~~SpR~~~PFVK~NCAALse~ 277 (574) T TIGR01817 198 GAEPEAARRRSGKEDGIVGKSPAMRQVVDQIKVVARSNSTVLLRGESGTGKELIAKAIHELSPRAKRPFVKLNCAALSET 277 (574) T ss_pred CCCCCHHHHHCCCCCCCCCCCHHHHHHHHHHHHHCCCCCEEEEECCCCCCHHHHHHHHCCCCCCCCCCCEEEECCCCCCC T ss_conf 56554123312344740124789999998865201317667850565744334442340466455788545006447761 Q ss_pred CCHHHHHCCCCC-CCCCCCCCCCCCCCCCCCEEEECCCCHHHHHHHHHHHHHHHHHHCCCCCCCCCCCCCCEEEEECCCC Q ss_conf 002433112555-5322111001234466714751664200188999888877642001123553212343156521433 Q gi|254780916|r 206 KIEKFLFGDVDL-QTKNSAQFLGKFIEANGGTIVLEEPDALPLAVQGRIYNFIETGKIEFFDSRGAIRLDVRLIFLTEKN 284 (482) Q Consensus 206 ~~e~~lFG~~~~-~~~~~~~~~g~~~~a~~Gtl~l~ei~~L~~~~Q~~Ll~~l~~~~~~~~g~~~~~~~~~RiIa~t~~~ 284 (482) T Consensus 278 lLESELFGHEKGAFTGA~~~RkGRFElAdGGTLFLDEIGEISPaFQAKLLRVLQEGEFERVGG~~TlKVdVRlvaATNrd 357 (574) T TIGR01817 278 LLESELFGHEKGAFTGAVAQRKGRFELADGGTLFLDEIGEISPAFQAKLLRVLQEGEFERVGGNRTLKVDVRLVAATNRD 357 (574) T ss_pred HHHHHHHCCCCHHHHHHHHHCCCCEEECCCCCCCCCCCCCCCHHHHHHHHHHHHCCCEEEECCCEEEEEEEEEEECCCCC T ss_conf 12454513430146888751777533027883200001467856888998875210025327872488736788613735 Q ss_pred CCCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCCCCCCCCCCCCCCCCCCCCCCCCHHHHHHH Q ss_conf 21111112333799988654334467787744222255667776410112233332111110001223389868999999 Q gi|254780916|r 285 LLPQVKSHVFRKDLYYRISVFLINISTLRSRSEDIPWLVHFFLQSFCTKNAIKQISISDKALSLLTKYPWIDNVQELKNI 364 (482) Q Consensus 285 L~~~~~~g~fr~dLy~rL~~~~i~iPpLReR~eDI~~L~~~fl~~~~~~~~~~~~~ls~~a~~~L~~y~WPGNvREL~n~ 364 (482) T Consensus 358 LE~aV~~GeFRaDLYYRinVvPl~lPPLRER~~DIP~LA~~fL~kf~~en~R~mL~~~~~Ai~~Lm~c~wPGNVRELENC 437 (574) T TIGR01817 358 LEEAVAKGEFRADLYYRINVVPLILPPLRERREDIPLLAEAFLEKFNRENGRPMLTLSPSAIRVLMSCKWPGNVRELENC 437 (574) T ss_pred HHHHHHCCCCCCHHHHHHHHHHHHCCCCCCCCCHHHHHHHHHHHHHHHHHCCCEEEECHHHHHHHHCCCCCCCCEEHHHH T ss_conf 58897278973023554422234078777873116899999999876651872032267899897517899974004437 Q ss_pred HHHHHHHCCCCCCCHHHHHHHHCCCCCCCCCCC---------CCCCCCCCCCCCCCCCH-----HHCCCCCCCCCCCCCC Q ss_conf 999987438981068895454212445432234---------32222223344432100-----0000001123444543 Q gi|254780916|r 365 LLRAVIGLKDSHLTEDRFVLLLSREGKKEREFH---------TETACTCYTEGKSSDTI-----LDNLSQESIPAIGQDG 430 (482) Q Consensus 365 i~r~~i~~~~~~i~~~~~~~~l~~~~~~~~~~~---------~~~~~~~~~~~~~~~~~-----~~~~~~~~~~~~~~~~ 430 (482) T Consensus 438 ~eRtAtLs~~~~It~~df~c~~~~c~s~~L~~~~~~~~~~P~~~~~p~~~~~~~pla~~~~~PA~~~pa~~~~p~~~~~~ 517 (574) T TIGR01817 438 VERTATLSRSGTITRSDFSCQSGQCLSKMLAKSSAYKKVDPAVPDAPLGAVSIVPLAETTALPAVESPASAALPAEVGLS 517 (574) T ss_pred HHHHHHHCCCCCCCCCEEEECCCCCCCCCCCCCCCCCCCCCCCCCCCCCCEECCCCCCCCCCCHHHCCCCCCCCCCCCCC T ss_conf 87787541688516423664278888888888887788778777888886532573014677522054334677667778 Q ss_pred H-------HHHHHHHHHHHHHHHHHHHCCCHHHHHHHHCCCHHHHHHHHHHHCCCCCCC Q ss_conf 2-------589999999999999998287278999784899889999999818881449 Q gi|254780916|r 431 E-------VRRLSDIEKEIIGLAMKLYRAQMSEVARRLGIGRSTLYRKIREYNIEVDSL 482 (482) Q Consensus 431 ~-------~~~l~e~E~~~I~~aL~~~~Gn~~~aA~~LGIsR~tL~rKlk~~gi~~d~~ 482 (482) T Consensus 518 gteaCPavA~~l--~eRERli~AlE~aGWVQAKAARlLg~TPRQVgYalr~~~I~~kk~ 574 (574) T TIGR01817 518 GTEACPAVAPTL--SERERLIAALEKAGWVQAKAARLLGLTPRQVGYALRKLNIEVKKL 574 (574) T ss_pred CCCCCCCCCCCC--CCHHHHHHHHHHCCHHHHHHHHHHCCCHHHHHHHHHHCCCCCCCC T ss_conf 755455678872--317899999975153799999973786558999998848765669

HHsearch alignment for GI: 254780916 and conserved domain: TIGR01817