>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=8.1e-36 Score=259.29 Aligned_cols=240 Identities=23% Similarity=0.290 Sum_probs=176.8 Q ss_pred CCCCCCCEEEEEEEECCC-----CEEEEEEECCCCCCCCCCCEEEEEEEC----CCEE-EEEEEEECCCCC-----CCCE Q ss_conf 366531068988884799-----869999807789983997179999843----9858-876654228576-----8860 Q gi|254780363|r 8 LPVNVYCESVISIKHYTD-----RLFRFCITRPKSFRFRSGEFVMLGLMV----NGRR-ISRAYSMASPCW-----DDKL 72 (264) Q Consensus 8 ~p~~~~~~~V~~v~~~t~-----~~~~~~l~~~~~~~f~~GQ~v~i~~~~----~g~~-~~R~YSiaS~p~-----~~~l 72 (264) T Consensus 4 ~~~~P~~~~v~~n~~l~~~~~~~~v~hi~~d~~g~~~y~eGqsigiippg~~~~~g~p~~~RlYSIAS~~~g~~~~~~~~ 83 (286) T cd06208 4 KPKNPLIGKVVSNTRLTGPDAPGEVCHIVIDHGGKLPYLEGQSIGIIPPGTDAKNGKPHKLRLYSIASSRYGDDGDGKTL 83 (286) T ss_pred CCCCCEEEEEEEEEEECCCCCCCCEEEEEEECCCCCCEECCCEEEEECCCCCCCCCCCCCCCEEEECCCCCCCCCCCCEE T ss_conf 89998589998679824899987079999967998766158887888998765579968760578657877777899779 Q ss_pred EEEEEEEC----------CCCCCCCCCCCCCCCEEECCCCCCC-CCCCCCCCCCCEEEEEECCCCHHHHHHHHHHHHHHC Q ss_conf 58999943----------8885661001238851002578873-216432235866999975867277899887634103 Q gi|254780363|r 73 EFFSIKVE----------QGPLTTHLQNIQPGDTILLHKKSTG-TLVLDALIPGNRLYLFSTGTGIAPFVSVIRDPGTYE 141 (264) Q Consensus 73 e~~i~~v~----------~G~~S~~L~~l~~Gd~i~i~~~p~G-~f~~d~~~~~~~lilIAgGtGItP~~sii~~~~~~~ 141 (264) T Consensus 84 sl~Vrr~~~~~~~~g~~~~GvcS~yL~~lk~Gd~v~v~g-p~g~~F~lP~-d~~~piIMIg~GTGIAPfRsfl~~r~~~~ 161 (286) T cd06208 84 SLCVKRLVYTDPETDETKKGVCSNYLCDLKPGDDVQITG-PVGKTMLLPE-DPNATLIMIATGTGIAPFRSFLRRLFREK 161 (286) T ss_pred EEEEEEEEEECCCCCCCCCEEECHHHHCCCCCCEEEEEC-CCCCCCCCCC-CCCCCEEEEECCCCCHHHHHHHHHHHHHH T ss_conf 999999775358888503316516654389999899980-4478401888-99998799947868465899999999864 Q ss_pred -----CCCCEEEEEECCCHHHHHHHHHHHHHHHHHHHHHHHHCCCCEEEEECCCCCCCCCC---CCCCCCCCCHHHHHCC Q ss_conf -----57857999951998898733566898986445777405884389820454444465---6775431104788528 Q gi|254780363|r 142 -----KFDEVIVTQTCRQVVELQYGIDVMHEISQDEILKDLIGQKLKFYRTVTQEDYLYKG---RITNHILSGEFYRNMD 213 (264) Q Consensus 142 -----~~~~i~L~~g~R~~~dl~y~~~l~~~~~~~~~~~~~~~~~~~~~~~~s~e~~~~~g---rit~~i~~g~l~~~~~ 213 (264) T Consensus 162 ~~~~~~~G~~~LffG~R~~~d~lY~~el~~~~~~~-------~~~~~~~~AfSRe~~~~~g~K~YVQd~l~e~~-~~i-- 231 (286) T cd06208 162 HADYKFTGLAWLFFGVPNSDSLLYDDELEKYPKQY-------PDNFRIDYAFSREQKNADGGKMYVQDRIAEYA-EEI-- 231 (286) T ss_pred CCCCCCCCCEEEEEECCCHHHHHHHHHHHHHHHHC-------CCCEEEEEEEECCCCCCCCCCCHHHHHHHHHH-HHH-- T ss_conf 43457887689999478732435899999999858-------77644699995788776656222788999979-999-- Q ss_pred CCCCCHHCCEEEEECCHHHHHHHHHHHHHC---CCC--C--CCCCCCCEEEEE Q ss_conf 998873137899968989999999999986---985--3--156799509999 Q gi|254780363|r 214 LSPLNPDTDRIMICGSPTMIVDMKDLLIAK---KFR--E--GSNSRPGTFVVE 259 (264) Q Consensus 214 ~~~~~~~~~~vyiCGpp~Mi~~v~~~L~~~---G~~--~--~~~~~~g~~~~E 259 (264) T Consensus 232 ~~ll~~~~a~vYvCG~k~M~~gV~~aL~~i~~~~~~~~~~~~~lk~~~R~~~e 284 (286) T cd06208 232 WNLLDKDNTHVYICGLKGMEPGVDDALTSVAEGGLAWEEFWESLKKKGRWHVE 284 (286) T ss_pred HHHHHCCCCEEEEECCCCHHHHHHHHHHHHHHHCCCHHHHHHHHHHCCCEEEE T ss_conf 99985799699981750158999999999986387999999999877971221

HHsearch alignment for GI: 254780363 and conserved domain: cd06208