>TIGR01281 DPOR_bchL light-independent protochlorophyllide reductase, iron-sulfur ATP-binding protein; InterPro: IPR005971 Synonym: dark protochlorophyllide reductase Protochlorophyllide reductase catalyzes the reductive formation of chlorophyllide from protochlorophyllide during biosynthesis of chlorophylls and bacteriochlorophylls. The light-independent (dark) form of protochlorophyllide reductase plays a key role in the ability of gymnosperms, algae, and photosynthetic bacteria to form chlorophyll in the dark. Genetic and sequence analyses have indicated that dark protochlorophyllide reductase consists of three protein subunits that exhibit significant sequence similarity to the three subunits of nitrogenase, which catalyzes the reductive formation of ammonia from dinitrogen. Dark protochlorophyllide reductase activity was shown to be dependent on the presence of all three subunits, ATP, and the reductant dithionite. The BchL peptide (ChlL in chloroplast and cyanobacteria) is an ATP-binding iron-sulphur protein of the dark form protochlorophyllide reductase, an enzyme similar to nitrogenase . ; GO: 0005524 ATP binding, 0016730 oxidoreductase activity acting on iron-sulfur proteins as donors, 0015995 chlorophyll biosynthetic process, 0019685 photosynthesis dark reaction.

Probab=98.71 E-value=1.4e-07 Score=66.92 Aligned_cols=181 Identities=18% Similarity=0.229 Sum_probs=108.8 Q ss_pred EEEEECCCCCCCHHHHHHHHHHHHHCCCCCCEECCCCCCCHHHHHHHHHCCCCCCCCC-CCCCCCCC-HH---------- Q ss_conf 2999835898747999999999984048612013887380689999985578731144-30014510-34---------- Q gi|254780487|r 4 RLVIVGTDTSVGKTIFASALVHALNAYYWKPIQSGMYEETDSKTIHRIGRIPKSHIIP-EKWKLRTP-AS---------- 71 (217) Q Consensus 4 ~i~I~GT~t~vGKT~vs~~L~~~l~~~~~KPv~~G~~~~~D~~~~~~~~~~~~~~~~~-~~~~~~~~-~~---------- 71 (217) T Consensus 2 ~lAvYGKG-GiGKSTTssNLSvA~A~~GkkVlQIGCDPKhDSTFTLtg-~L~PTvidvL~~~~yH~E~v~~eD~iy~GY~ 79 (275) T TIGR01281 2 ILAVYGKG-GIGKSTTSSNLSVALAKKGKKVLQIGCDPKHDSTFTLTG-KLIPTVIDVLDAVNYHYEDVEPEDVIYTGYG 79 (275) T ss_pred EEEEECCC-CCCCHHHHHHHHHHHHHCCCEEEEECCCCCCCCCCCCCC-CCCCCEEEECCCCCCCEEECCCCCEEEECCC T ss_conf 68886388-877004678999999846991898525788887745447-4167464422567630310333787783468 Q ss_pred ---------HHHHHHHH----HCCCHHH-HHHHHHHCCEEEEECCCCCCCC-CCCCCCHHHHHHHHCCCEEEEECCCCCH Q ss_conf ---------78899985----0235078-8642232887999227655566-7675308999997479448970577650 Q gi|254780487|r 72 ---------PHLAAEID----GVIIDPA-TINPPDINDSIIIEGIGGLLVP-LTTEYLFIDLIERWQFPIILCARTSLGT 136 (217) Q Consensus 72 ---------~~~~~~~~----~~~i~~~-~~~~~~~~D~viIEGagg~~~~-~~~~~~~~dla~~l~~~vILV~~~~~g~ 136 (217) T Consensus 80 GVd~vEaGGPPAGsGCGGYVVGeTVKLLke~~~~~~yDVilFDVLGDVVCGGFAaPL~YAd-------~aLvva~NDFDa 152 (275) T TIGR01281 80 GVDCVEAGGPPAGSGCGGYVVGETVKLLKELDVLDEYDVILFDVLGDVVCGGFAAPLQYAD-------YALVVAANDFDA 152 (275) T ss_pred CEEEEECCCCCCCCCCCCEEECCHHHHHHHCCHHHHCCEEEEEECCCEEECCCCCHHHHHC-------CEEEEECCCCHH T ss_conf 5688714736898889874715224556652633428979996257555175464112321-------256661077217 Q ss_pred H---HHHHHHHHHH-HH-CCCEEEEEEECCCCCC-----CHHHHHHHHCCCCEEEEECCCCCCCHHH Q ss_conf 4---5799999999-84-7990799997697780-----0599999861998999947888888879 Q gi|254780487|r 137 I---NHSLLSLETL-RN-RNINIIGIAFIGDSMP-----KVEETIVKIGRIPHLGRLPKIDPIDPDV 193 (217) Q Consensus 137 i---~~~~l~~~~~-~~-~g~~i~GiIlN~~~~~-----~~~~~le~~~~ipvLG~iP~~~~~~~~~ 193 (217) T Consensus 153 lFAANRia~av~~K~~~Gy~vkLAGiIaNR~~~~yGGGtdlle~F~~~~~~~~l~~~P~~d~IR~SR 219 (275) T TIGR01281 153 LFAANRIAAAVREKAKSGYDVKLAGIIANRVDKEYGGGTDLLEKFAERVGTPVLGVVPRLDEIRRSR 219 (275) T ss_pred HHHHHHHHHHHHHHHCCCCEEEEEEEEECCCCCCCCCCCCHHHHHHHHCCCCEEEECCCHHHCCHHH T ss_conf 8999999999999841797078732663121131178715689999862883220077711102010

HHsearch alignment for GI: 254780487 and conserved domain: TIGR01281