>cd06208 CYPOR_like_FNR These ferredoxin reductases are related to the NADPH cytochrome p450 reductases (CYPOR), but lack the FAD-binding region connecting sub-domain. Ferredoxin-NADP+ reductase (FNR) is an FAD-containing enzyme that catalyzes the reversible electron transfer between NADP(H) and electron carrier proteins, such as ferredoxin and flavodoxin. Isoforms of these flavoproteins (i.e. having a non-covalently bound FAD as a prosthetic group) are present in chloroplasts, mitochondria, and bacteria in which they participate in a wide variety of redox metabolic pathways. The C-terminal domain contains most of the NADP(H) binding residues and the N-terminal domain interacts non-covalently with the isoalloxazine rings of the flavin molecule which lies largely in a large gap between the two domains. Ferredoxin-NADP+ reductase first accepts one electron from reduced ferredoxin to form a flavin semiquinone intermediate. The enzyme then accepts a second electron to form FADH2, which then

Probab=100.00 E-value=3.1e-31 Score=210.87 Aligned_cols=189 Identities=22% Similarity=0.303 Sum_probs=148.0 Q ss_pred CCCCEEEEEEEEEECC-----CCEEEEEEECCCCCCCCCCCEEEECCCC----CCCC-EEEEEEECCCCCC-----CCCE Q ss_conf 7342117898998479-----9869999807899973898578803145----8611-0556432056677-----7601 Q gi|254780364|r 9 AADVYCESVISVKHYT-----DRLFRFCITRPKSFRFRSGEFVMLGLIV----NGRP-IFRAYSIASPCRD-----DKLE 73 (224) Q Consensus 9 p~~~~~~~V~~~~~~T-----~~~~~l~l~~p~~~~f~aGQ~~~l~~~~----~g~~-~~R~ySiaS~p~~-----~~~~ 73 (224) T Consensus 5 ~~~P~~~~v~~n~~l~~~~~~~~v~hi~~d~~g~~~y~eGqsigiippg~~~~~g~p~~~RlYSIAS~~~g~~~~~~~~s 84 (286) T cd06208 5 PKNPLIGKVVSNTRLTGPDAPGEVCHIVIDHGGKLPYLEGQSIGIIPPGTDAKNGKPHKLRLYSIASSRYGDDGDGKTLS 84 (286) T ss_pred CCCCEEEEEEEEEEECCCCCCCCEEEEEEECCCCCCEECCCEEEEECCCCCCCCCCCCCCCEEEECCCCCCCCCCCCEEE T ss_conf 99985899986798248999870799999679987661588878889987655799687605786578777778997799 Q ss_pred EEEEEECC----------CCCCCCCCCCCCCCCCEECCCCCCCCCCCCCCCCCCEEEEECCCCHHHHHHHHHHHHHC--- Q ss_conf 79996157----------67653100002222210016887533564467688179996586808899999986530--- Q gi|254780364|r 74 FCSIKVDK----------GFFTTYLQNIQPGDTILLHKKSTGDLILDSLIPGNRLYLFSMGTGIAPFASMIRDPETY--- 140 (224) Q Consensus 74 ~~i~~~~~----------g~~s~~l~~~~~gd~~~~~~~p~g~f~~~~~~~~~~lvlIAgGtGiaP~~silr~~~~~--- 140 (224) T Consensus 85 l~Vrr~~~~~~~~g~~~~GvcS~yL~~lk~Gd~v~v~gp~g~~F~lP~d-~~~piIMIg~GTGIAPfRsfl~~r~~~~~~ 163 (286) T cd06208 85 LCVKRLVYTDPETDETKKGVCSNYLCDLKPGDDVQITGPVGKTMLLPED-PNATLIMIATGTGIAPFRSFLRRLFREKHA 163 (286) T ss_pred EEEEEEEEECCCCCCCCCEEECHHHHCCCCCCEEEEECCCCCCCCCCCC-CCCCEEEEECCCCCHHHHHHHHHHHHHHCC T ss_conf 9999977535888850331651665438999989998044784018889-999879994786846589999999986443 Q ss_pred --CCCCEEEEEEECCCHHHHHHHHHHHHHHHHHHHHCCCCCCCEEEEEEECCCCCCC---CCCCHHHHHC Q ss_conf --8863389999405864543048889988753321012468759998105788776---6721687858 Q gi|254780364|r 141 --KKFDEVIITHTCGRVAELQYGIDVMHEISQDEILKDLIGQKLKFYRTVTQEDYLY---KGRITNHILS 205 (224) Q Consensus 141 --~~~~~i~l~~g~R~~~dl~~~~el~~l~~~~~~~~~~~~~~~~~~~~isre~~~~---~GrIt~~i~~ 205 (224) T Consensus 164 ~~~~~G~~~LffG~R~~~d~lY~~el~~~~~~~~-------~~~~~~~AfSRe~~~~~g~K~YVQd~l~e 226 (286) T cd06208 164 DYKFTGLAWLFFGVPNSDSLLYDDELEKYPKQYP-------DNFRIDYAFSREQKNADGGKMYVQDRIAE 226 (286) T ss_pred CCCCCCCEEEEEECCCHHHHHHHHHHHHHHHHCC-------CCEEEEEEEECCCCCCCCCCCHHHHHHHH T ss_conf 4578876899994787324358999999998587-------76446999957887766562227889999

HHsearch alignment for GI: 254780364 and conserved domain: cd06208