HHsearch alignment for GI: 254780791 and conserved domain: TIGR01278

>TIGR01278 DPOR_BchB light-independent protochlorophyllide reductase, B subunit; InterPro: IPR005969 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 .; GO: 0016730 oxidoreductase activity acting on iron-sulfur proteins as donors, 0015995 chlorophyll biosynthetic process, 0019685 photosynthesis dark reaction.
Probab=90.77  E-value=0.97  Score=26.73  Aligned_cols=109  Identities=17%  Similarity=0.338  Sum_probs=80.2

Q ss_pred             EEEECCCHHHHHHHHHHHHHC---CC-EEEEEEECCCCCCCHHHHHHHHHHHHHHHCCCCCCCCCCEEEEECCCCCH---
Q ss_conf             998478425899999986305---97-58999721001111036799999999741003576777589995168884---
Q gi|254780791|r  149 AVITSPTGAVIRDILQRISCR---FP-LRVIIFPVKVQGDECPKEIANAILQLNTLKEGRTCPRPDIIILARGGGSI---  221 (529)
Q Consensus       149 ~vits~~~a~~~D~~~~~~~r---~p-~~~~~~p~~vQG~~a~~~i~~ai~~~~~~~~~~~~~~~D~iii~RGGGS~---  221 (529)
T Consensus        28 ~v~HAPqGDdY~n~~~sMLER~~~fpp~T~Svv~~~~La~Gs~~rl~~tv~~~d~~~------~PdlIvv~psCss~lLQ  101 (562)
T TIGR01278        28 AVLHAPQGDDYVNVMFSMLERTPNFPPVTTSVVDRRDLARGSQARLVDTVRRVDERE------KPDLIVVTPSCSSSLLQ  101 (562)
T ss_pred             EEEECCCCCHHHHHHHHHHCCCCCCCCCEEEEECCEECCHHHHHHHHHHHHHHHHCC------CCCEEEECCCHHHHHHH
T ss_conf             688678884289999986227898594027676255754135574179898651035------88679982220147887


Q ss_pred             HHHHHCCHHHHHHHHHH-CCCEEEE-EECC----C---CCCHHHHHHHCCCCCCCH
Q ss_conf             44220076999999974-8904885-2057----7---752589886412377721
Q gi|254780791|r  222 EDLWHFNDEMIVRAIAN-SSIPIIS-AIGH----E---TDWTLADYAADLRAPTPT  268 (529)
Q Consensus       222 eDL~~FN~e~laraI~~-~~iPVis-gIGH----E---~D~Tl~D~VAD~Ra~TPT  268 (529)
T Consensus       102 EDL-----~~~a~~~g~~t~~~v~~~~vn~yR~~E~~A~~~~L~~lV~~~~~~~~~  152 (562)
T TIGR01278       102 EDL-----GNLAAAAGLDTKSKVLVADVNAYRVKELQAADRLLTQLVRRFAKEQPK  152 (562)
T ss_pred             HCH-----HHHHHHHCCCCCCCCCHHCCCHHHHHHHHHHHHHHHHHHHHHHCCCCC
T ss_conf             168-----999998263356531030376578999999899999999998477888