>TIGR01287 nifH nitrogenase iron protein; InterPro: IPR005977 The enzyme responsible for nitrogen fixation, the nitrogenase, shows a high degree of conservation of structure, function, and amino acid sequence across wide phylogenetic ranges. All known Mo-nitrogenases consist of two components, component I (also called dinitrogenase, or Fe-Mo protein), an alpha2beta2 tetramer encoded by the nifD and nifK genes, and component II (dinitrogenase reductase, or Fe protein) a homodimer encoded by the nifH gene , . Two operons, nifDK and nifEN, encode a tetrameric (alpha2beta2 and N2E2) enzymatic complex. Nitrogenase contains two unusual rare metal clusters; one of them is the iron molybdenum cofactor (FeMo-co), which is considered to be the site of dinitrogen reduction and whose biosynthesis requires the products of nifNE and of some other nif genes . It has been proposed that NifNE might serve as a scaffold upon which FeMo-co is built and then inserted into component I .; GO: 0016163 nitrogenase activity, 0009399 nitrogen fixation, 0016612 molybdenum-iron nitrogenase complex.

Probab=100.00 E-value=1.4e-32 Score=209.79 Aligned_cols=238 Identities=23% Similarity=0.337 Sum_probs=190.0 Q ss_pred EEEEEECCCCCCCHHHHHHHHHHHHHHCC-CCEEEEECCCCCCCCHHHCCCCCCCCCCEEEEEECC---CC--HHHCCCC Q ss_conf 49999808898888999999999999879-959999878776801121246333454116763025---77--1210244 Q gi|254780806|r 7 RIITIANQKGGVGKTTTAINLSTALAAIG-ENVLLIDLDPQGNASTGLGIELYDRKYSSYDLLIEE---KN--INQILIQ 80 (265) Q Consensus 7 kvI~v~s~KGGvGKTT~a~nlA~~la~~g-~rVllID~D~q~~~~~~l~~~~~~~~~ti~~~l~~~---~~--l~~~i~~ 80 (265) T Consensus 1 rqiAiY-GKGGIGKSTT~~N~~AAla~~gdkkVl~~GCDPKaDsTr~l~G--g~~~~TVLd~lre~G~ve~~~~e~-v~~ 76 (278) T TIGR01287 1 RQIAIY-GKGGIGKSTTTQNIAAALAEMGDKKVLVVGCDPKADSTRLLLG--GKAQPTVLDVLREKGAVEDVELED-VIK 76 (278) T ss_pred CEEEEE-CCCCCCCCHHHHHHHHHHHHHCCCEEEEEECCCCCCHHHHHHC--CCCCCHHHHHHHHCCCCCCCCCCH-HHE T ss_conf 948886-2788670068889999998624955899723885202346517--744554899998568711445102-200 Q ss_pred CCCCCEEECCCCCCCCCCCCCCCCCCCCCHHHHHHHHHHHHC-CCCCCEEEECCCCCCCCCCHHHH------HHHCCCCC Q ss_conf 444420001488745775000123222210233322476510-27820331013332222101123------31001111 Q gi|254780806|r 81 TAIPNLSIIPSTMDLLGIEMILGGEKDRLFRLDKALSVQLTS-DFSYIFLDCPPSFNLLTMNAMAA------ADSILVPL 153 (265) Q Consensus 81 ~~~~~l~iipa~~~~~~~~~~l~~~~~~~~~l~~~l~~~l~~-~yD~IiiD~pp~~~~~~~~al~a------ad~viip~ 153 (265) T Consensus 77 ~Gf~girCVESGGPePGVGCAGRGvItai~lL~~~--g~y~dLdlD~V~YDV---LGDVVCGGFAmP~R~g~A~eiYiVt 151 (278) T TIGR01287 77 EGFGGIRCVESGGPEPGVGCAGRGVITAIDLLEEL--GAYEDLDLDVVIYDV---LGDVVCGGFAMPLREGLAQEIYIVT 151 (278) T ss_pred ECCCCEEEEEECCCCCCCCCCCCHHEEEEHHHHHC--CCCCCCCCCEEEEEE---CCCEEECCCCCHHHCCCCCEEEEEC T ss_conf 16883188850768789520687112013377533--787311677689842---3655656603610058865488860 Q ss_pred CCCCHHHHHHHHHHHHHHHHHHHHHCCCCCCCCCCCEEECCCHHHHHHHHHHHHHHCCCCCCCCCCCCHHHHHHHHCCCC Q ss_conf 12311378887533577765543202677431002023125310011268999880852015626786889877737985 Q gi|254780806|r 154 QCEFFALEGLSQLLETVEEVRRTVNSALDIQGIILTMFDSRNSLSQQVVSDVRKNLGGKVYNTVIPRNVRISEAPSYGKP 233 (265) Q Consensus 154 ~p~~~s~~~~~~~~~~i~~~~~~~~~~~~~~~iv~N~~~~~~~~~~~~~~~l~~~~~~~v~~~~Ip~~~~i~~a~~~g~p 233 (265) T Consensus 152 Sge~MAlYAANNI~kGI~kYa~~GGv~--LGG~IcN~--R~~~~e~El~~~fA~~lgtq~i~-~VPrs~~V~~AEl~~~T 226 (278) T TIGR01287 152 SGEMMALYAANNIAKGILKYAKSGGVR--LGGIICNS--RNVDDEKELVDEFAKKLGTQLIH-FVPRSNIVQKAELEKKT 226 (278) T ss_pred CCHHHHHHHHHHHHHHHHHHHHCCCCE--ECCEEECC--CCCCCHHHHHHHHHHHHCCEEEE-ECCCCCCCHHHHHCCCC T ss_conf 340678999978877789997538822--22478714--57621789999999873770675-21788521278736884 Q ss_pred EEEECCCCHHHHHHHHHHHHHHHHH Q ss_conf 7999799989999999999999999 Q gi|254780806|r 234 AIIYDLKCAGSQAYLKLASELIQQE 258 (265) Q Consensus 234 v~~~~p~s~~a~~~~~la~el~~~~ 258 (265) T Consensus 227 VIE~dP~s~qA~~YR~LA~~I~~N~ 251 (278) T TIGR01287 227 VIEYDPESEQANEYRELAKKIYENE 251 (278) T ss_pred EEEECCCCHHHHHHHHHHHHHHHCC T ss_conf 5633887157899999999998257

HHsearch alignment for GI: 254780806 and conserved domain: TIGR01287