>cd00322 FNR_like Ferredoxin reductase (FNR), an FAD and NAD(P) binding protein, was intially identified as a chloroplast reductase activity, catalyzing the electron transfer from reduced iron-sulfur protein ferredoxin to NADP+ as the final step in the electron transport mechanism of photosystem I. FNR transfers electrons from reduced ferredoxin to FAD (forming FADH2 via a semiquinone intermediate) and then transfers a hydride ion to convert NADP+ to NADPH. FNR has since been shown to utilize a variety of electron acceptors and donors and has a variety of physiological functions including nitrogen assimilation, dinitrogen fixation, steroid hydroxylation, fatty acid metabolism, oxygenase activity, and methane assimilation in many organisms. FNR has an NAD(P)-binding sub-domain of the alpha/beta class and a discrete (usually N-terminal) flavin sub-domain which vary in orientation with respect to the NAD(P) binding domain. The N-terminal moeity may contain a flavin prosthetic group (as in

Probab=100.00 E-value=1.4e-43 Score=311.10 Aligned_cols=217 Identities=23% Similarity=0.360 Sum_probs=179.5 Q ss_pred EEEEECCCCEEEEEEECCCCCCCCCCCEEEEEEECCCEEEEEEEEECCCCCC-CCEEEEEEEECCCCCCCCCCCCCCCCE Q ss_conf 8888479986999980778998399717999984398588766542285768-860589999438885661001238851 Q gi|254780363|r 18 ISIKHYTDRLFRFCITRPKSFRFRSGEFVMLGLMVNGRRISRAYSMASPCWD-DKLEFFSIKVEQGPLTTHLQNIQPGDT 96 (264) Q Consensus 18 ~~v~~~t~~~~~~~l~~~~~~~f~~GQ~v~i~~~~~g~~~~R~YSiaS~p~~-~~le~~i~~v~~G~~S~~L~~l~~Gd~ 96 (264) T Consensus 1 ~~~~~~t~d~~~~~~~~~~~~~~~pGQ~v~l~~~~~g~~~~R~ySi~s~p~~~~~~~~~ik~~~~G~~s~~L~~l~~G~~ 80 (223) T cd00322 1 VATEDVTDDVRLFRLQLPNGFSFKPGQYVDLHLPGDGRGLRRAYSIASSPDEEGELELTVKIVPGGPFSAWLHDLKPGDE 80 (223) T ss_pred CCCEECCCCEEEEEEECCCCCCCCCCEEEEEEECCCCCEEEEEEEECCCCCCCCEEEEEEEEECCCCCCHHHCCCCCCCE T ss_conf 97247589929999987998885998349999645995657888766269999989999999899985730222799999 Q ss_pred EECCCCCCCCCCCCCCCCCCEEEEEECCCCHHHHHHHHHHHHHHCCCCCEEEEEECCCHHHHHHHHHHHHHHHHHHHHHH Q ss_conf 00257887321643223586699997586727789988763410357857999951998898733566898986445777 Q gi|254780363|r 97 ILLHKKSTGTLVLDALIPGNRLYLFSTGTGIAPFVSVIRDPGTYEKFDEVIVTQTCRQVVELQYGIDVMHEISQDEILKD 176 (264) Q Consensus 97 i~i~~~p~G~f~~d~~~~~~~lilIAgGtGItP~~sii~~~~~~~~~~~i~L~~g~R~~~dl~y~~~l~~~~~~~~~~~~ 176 (264) T Consensus 81 v~v~g-P~G~f~~~~-~~~~~~vliagG~GitP~~s~l~~~~~~~~~~~v~l~~g~r~~~~~~~~~el~~l~~~------ 152 (223) T cd00322 81 VEVSG-PGGDFFLPL-EESGPVVLIAGGIGITPFRSMLRHLAADKPGGEITLLYGARTPADLLFLDELEELAKE------ 152 (223) T ss_pred EEEEE-CCCCCCCCC-CCCCCEEEEECCCCCHHHHHHHHHHHHCCCCCCEEEEEECCCHHHHHHHHHHHHHHHH------ T ss_conf 99993-776532146-7998789997786614699999999974888863998624897896789999999975------ Q ss_pred HHCCCCEEEEECCCCCCCCCCCCCCCCCCCHHHHHCCCCCCCHHCCEEEEECCHHHHHHHHHHHHHCCCCCC Q ss_conf 405884389820454444465677543110478852899887313789996898999999999998698531 Q gi|254780363|r 177 LIGQKLKFYRTVTQEDYLYKGRITNHILSGEFYRNMDLSPLNPDTDRIMICGSPTMIVDMKDLLIAKKFREG 248 (264) Q Consensus 177 ~~~~~~~~~~~~s~e~~~~~grit~~i~~g~l~~~~~~~~~~~~~~~vyiCGpp~Mi~~v~~~L~~~G~~~~ 248 (264) T Consensus 153 --~~~~~~~~~~~~~~~~~~~~~~~~~~~-~~~~---~~~~~~~~~~~yiCGP~~m~~~v~~~l~~~Gv~~~ 218 (223) T cd00322 153 --GPNFRLVLALSRESEAKLGPGGRIDRE-AEIL---ALLPDDSGALVYICGPPAMAKAVREALVSLGVPEE 218 (223) T ss_pred --CCCEEEEEEECCCCCCCCCCCCCCHHH-HHHH---HCCCCCCCCEEEEECCHHHHHHHHHHHHHCCCCHH T ss_conf --899899999877876765666751277-8998---64789899799991999999999999998699889

HHsearch alignment for GI: 254780363 and conserved domain: cd00322