>cd02040 NifH NifH gene encodes component II (iron protein) of nitrogenase. Nitrogenase is responsible for the biological nitrogen fixation, i.e. reduction of molecular nitrogen to ammonia. NifH consists of two oxygen-sensitive metallosulfur proteins: the mollybdenum-iron (alternatively, vanadium-iron or iron-iron) protein (commonly referred to as component 1), and the iron protein (commonly referred to as component 2). The iron protein is a homodimer, with an Fe4S4 cluster bound between the subunits and two ATP-binding domains. It supplies energy by ATP hydrolysis, and transfers electrons from reduced ferredoxin or flavodoxin to component 1 for the reduction of molecular nitrogen to ammonia.

Probab=100.00 E-value=0 Score=294.63 Aligned_cols=239 Identities=22% Similarity=0.346 Sum_probs=180.4 Q ss_pred EEEEEECCCCCCCHHHHHHHHHHHHHHCCCCEEEEECCCCCCCCHHHCCCCCCCCCCEEEEE----ECCCCHHHCCCCCC Q ss_conf 49999808898888999999999999879959999878776801121246333454116763----02577121024444 Q gi|254780806|r 7 RIITIANQKGGVGKTTTAINLSTALAAIGENVLLIDLDPQGNASTGLGIELYDRKYSSYDLL----IEEKNINQILIQTA 82 (265) Q Consensus 7 kvI~v~s~KGGvGKTT~a~nlA~~la~~g~rVllID~D~q~~~~~~l~~~~~~~~~ti~~~l----~~~~~l~~~i~~~~ 82 (265) T Consensus 2 r~Iai~-GKGGVGKTTtavNLA~aLa~~GkkVlliDaDpq~~~t~~l~g~--~~~~~~~~~l~~~~~~~~~~~~~i~~-~ 77 (270) T cd02040 2 RQIAIY-GKGGIGKSTTTQNLSAALAEMGKKVMIVGCDPKADSTRLLLGG--KAIPTVLDTLREKGEVELELEDVIFE-G 77 (270) T ss_pred CEEEEE-CCCCCCHHHHHHHHHHHHHHCCCEEEEECCCCCCCHHHHHCCC--CCCCCHHHHHHHCCCCCCCHHHHEEC-C T ss_conf 589997-9985778999999999999879949998657998513465299--88882899887527776538896133-7 Q ss_pred CCCEEECCCCCCCCCCCCCCCCCCCCCHHHHHHHHHHHHCCCCCCEEEECCCCCCCCCCHHH------HHHHCCCCCCCC Q ss_conf 44200014887457750001232222102333224765102782033101333222210112------331001111123 Q gi|254780806|r 83 IPNLSIIPSTMDLLGIEMILGGEKDRLFRLDKALSVQLTSDFSYIFLDCPPSFNLLTMNAMA------AADSILVPLQCE 156 (265) Q Consensus 83 ~~~l~iipa~~~~~~~~~~l~~~~~~~~~l~~~l~~~l~~~yD~IiiD~pp~~~~~~~~al~------aad~viip~~p~ 156 (265) T Consensus 78 ~~gv~~ip~~~~~~~~~~~gr~~-~~~~~ll~~l~-~~~~~~D~iliD~---lg~~~~~~~~~~i~~~~ad~viiv~t~e 152 (270) T cd02040 78 FGGIKCVESGGPEPGVGCAGRGV-ITAINLLEELG-AYEDDLDFVIYDV---LGDVVCGGFAMPIREGKAQEIYIVTSGE 152 (270) T ss_pred CCCCEEEECCCCCCCCHHCCCCH-HHHHHHHHHHH-HHHCCCCEEEEEC---CCCCCCCHHHCHHHHCCCCEEEEECCCC T ss_conf 67706410599643512124007-88999999854-3440698899823---5633321232303553388799962881 Q ss_pred CHHHHHHHHHHHHHHHHHHHHHCCCCCCCCCCCEEECCCHHHHHHHHHHHHHHCCCCCCCCCCCCHHHHHHHHCCCCEEE Q ss_conf 11378887533577765543202677431002023125310011268999880852015626786889877737985799 Q gi|254780806|r 157 FFALEGLSQLLETVEEVRRTVNSALDIQGIILTMFDSRNSLSQQVVSDVRKNLGGKVYNTVIPRNVRISEAPSYGKPAII 236 (265) Q Consensus 157 ~~s~~~~~~~~~~i~~~~~~~~~~~~~~~iv~N~~~~~~~~~~~~~~~l~~~~~~~v~~~~Ip~~~~i~~a~~~g~pv~~ 236 (265) T Consensus 153 ~~al~~~~~l~k~i~~~~~~~~~--~l~gvv~~~~--~~~~~~~~~~~~~~~~~~~~l~-~IP~d~~v~EA~~~g~pi~~ 227 (270) T cd02040 153 MMALYAANNICKGILKYAKSGGV--RLGGLICNSR--NTDREDELIDAFAKRLGTQMIH-FVPRDNVVQRAELRGKTVIE 227 (270) T ss_pred HHHHHHHHHHHHHHHHHHHCCCC--EEEEEEECCC--CCCHHHHHHHHHHHHHCCCEEE-ECCCCHHHHHHHHCCCEEEE T ss_conf 89999999999999999834697--4799983786--6513789999999985995287-77997178751342970799 Q ss_pred ECCCCHHHHHHHHHHHHHHHHHH Q ss_conf 97999899999999999999998 Q gi|254780806|r 237 YDLKCAGSQAYLKLASELIQQER 259 (265) Q Consensus 237 ~~p~s~~a~~~~~la~el~~~~~ 259 (265) T Consensus 228 ~~P~S~~A~ay~~LA~eii~~~~ 250 (270) T cd02040 228 YDPESKQADEYRELARKIVENKL 250 (270) T ss_pred ECCCCHHHHHHHHHHHHHHHCCC T ss_conf 79899899999999999984899

HHsearch alignment for GI: 254780806 and conserved domain: cd02040