>cd06191 FNR_iron_sulfur_binding Iron-sulfur binding Ferredoxin Reductase (FNR) proteins combine the FAD and NAD(P) binding regions of FNR with a C-terminal iron-sulfur binding cluster domain. FNR 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 methnae assimilation in a variety of 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

Probab=100.00 E-value=0 Score=334.48 Aligned_cols=226 Identities=20% Similarity=0.307 Sum_probs=184.8 Q ss_pred EEEEEEEECCCCEEEEEEECC--CCCCCCCCCEEEEEEECCCEEEEEEEEECCCCCCCCEEEEEEEECCCCCCCCCC-CC Q ss_conf 689888847998699998077--899839971799998439858876654228576886058999943888566100-12 Q gi|254780363|r 15 ESVISIKHYTDRLFRFCITRP--KSFRFRSGEFVMLGLMVNGRRISRAYSMASPCWDDKLEFFSIKVEQGPLTTHLQ-NI 91 (264) Q Consensus 15 ~~V~~v~~~t~~~~~~~l~~~--~~~~f~~GQ~v~i~~~~~g~~~~R~YSiaS~p~~~~le~~i~~v~~G~~S~~L~-~l 91 (264) T Consensus 1 lrV~~v~~~t~d~~~~~l~~~~~~~~~f~pGQ~v~~~~~~~g~~~~R~ySias~p~~~~l~~~Vk~~~~G~~S~~l~~~l 80 (231) T cd06191 1 LRVAEVRSETPDAVTIVFAVPGPLQYGFRPGQHVTLKLDFDGEELRRCYSLCSSPAPDEISITVKRVPGGRVSNYLREHI 80 (231) T ss_pred CEEEEEEEECCCEEEEEEECCCCCCCCCCCCEEEEEEEEECCEEEEECCCCCCCCCCCEEEEEEEEECCCCHHHHHHHCC T ss_conf 98999999489909999983898888859986799997168968771346678999998999999965996788997468 Q ss_pred CCCCEEECCCCCCCCCCCCCCCCCCEEEEEECCCCHHHHHHHHHHHHHHCCCCCEEEEEECCCHHHHHHHHHHHHHHHHH Q ss_conf 38851002578873216432235866999975867277899887634103578579999519988987335668989864 Q gi|254780363|r 92 QPGDTILLHKKSTGTLVLDALIPGNRLYLFSTGTGIAPFVSVIRDPGTYEKFDEVIVTQTCRQVVELQYGIDVMHEISQD 171 (264) Q Consensus 92 ~~Gd~i~i~~~p~G~f~~d~~~~~~~lilIAgGtGItP~~sii~~~~~~~~~~~i~L~~g~R~~~dl~y~~~l~~~~~~~ 171 (264) T Consensus 81 ~~Gd~v~i~g-P~G~f~l~~~-~~~~~lliAgG~GItP~~s~l~~~~~~~~~~~v~l~yg~r~~~d~~~~~eL~~l~~~- 157 (231) T cd06191 81 QPGMTVEVMG-PQGHFVYQPQ-PPGRYLLVAAGSGITPLMAMIRATLQTAPESDFTLIHSARTPADMIFAQELRELADK- 157 (231) T ss_pred CCCCEEEEEE-CCCCCEECCC-CCCCEEEEECCCCCCHHHHHHHHHHHHCCCCCEEEEEECCCHHHHHHHHHHHHHHHH- T ss_conf 9999999970-5346500678-888799995275327389999999985789858999826997994669999999864- Q ss_pred HHHHHHHCCCCEEEEECCCCC--CCCCCCCCCCCCCCHHHHHCCCCCCCHHCCEEEEECCHHHHHHHHHHHHHCCCCCCC Q ss_conf 457774058843898204544--444656775431104788528998873137899968989999999999986985315 Q gi|254780363|r 172 EILKDLIGQKLKFYRTVTQED--YLYKGRITNHILSGEFYRNMDLSPLNPDTDRIMICGSPTMIVDMKDLLIAKKFREGS 249 (264) Q Consensus 172 ~~~~~~~~~~~~~~~~~s~e~--~~~~grit~~i~~g~l~~~~~~~~~~~~~~~vyiCGpp~Mi~~v~~~L~~~G~~~~~ 249 (264) T Consensus 158 -------~~~~~~~~~~s~~~~~~~~~~~~-~~~-~~~~~~~~~---~~~~~~~~yiCGP~~m~~~~~~~L~~~Gv~~~- 224 (231) T cd06191 158 -------PQRLRLLCIFTRETLDSDLLHGR-IDG-EQSLGAALI---PDRLEREAFICGPAGMMDAVETALKELGMPPE- 224 (231) T ss_pred -------CCCCEEEEEEECCCCCCCCCCCC-CCC-HHHHHHHHC---CCCCCCEEEEECCHHHHHHHHHHHHHCCCCHH- T ss_conf -------89929999991678765655852-100-588987328---99889499993999999999999998799789- Q ss_pred CCCCCEEEEEEE Q ss_conf 679950999987 Q gi|254780363|r 250 NSRPGTFVVERA 261 (264) Q Consensus 250 ~~~~g~~~~E~~ 261 (264) T Consensus 225 -----~I~~E~F 231 (231) T cd06191 225 -----RIHTERF 231 (231) T ss_pred -----HEEEEEC T ss_conf -----8898279

HHsearch alignment for GI: 254780363 and conserved domain: cd06191