HHsearch alignment for GI: 254780709 and conserved domain: cd02033

>cd02033 BchX Chlorophyllide reductase converts chlorophylls into bacteriochlorophylls by reducing the chlorin B-ring. This family contains the X subunit of this three-subunit enzyme. Sequence and structure similarity between bchX, protochlorophyllide reductase L subunit (bchL and chlL) and nitrogenase Fe protein (nifH gene) suggest their functional similarity. Members of the BchX family serve as the unique electron donors to their respective catalytic subunits (bchN-bchB, bchY-bchZ and nitrogenase component 1). Mechanistically, they hydrolyze ATP and transfer electrons through a Fe4-S4 cluster.
Probab=96.47  E-value=0.0038  Score=42.40  Aligned_cols=161  Identities=21%  Similarity=0.356  Sum_probs=97.3

Q ss_pred             CCCCCCEEECCCCCCCCHHHHHHHHHHHHHHCCCCEEEEECCCCC------------HHHHHHHHHH---HHHHCC----
Q ss_conf             366741231135444442478999999985226742677434512------------4568899999---753035----
Q gi|254780709|r  107 FSHRPHVILVVGVNGVGKTTVIGKLSKKMSDAGLKVMLAAGDTFR------------SAAIDQLKIW---ADRTSA----  167 (321)
Q Consensus       107 ~~~~p~vil~vG~nG~GKTTT~aKLA~~~~~~g~kV~lva~DtfR------------~aA~eQL~~~---a~~~~v----  167 (321)
T Consensus        27 ~~k~~~~IAiYGKGGIGKSTts~NlsAAlA~~GkkVm~IGCDPKaDSTrlLlgG~~~~TVLd~~~~~~~~~e~v~~~dv~  106 (329)
T cd02033          27 PTKKTQIIAIYGKGGIGKSFTLANLSYMMAQQGKRVLLIGCDPKSDTTSLLFGGKACPTIIETSAKKKLAGEEVQIGDVC  106 (329)
T ss_pred             CCCCCEEEEEECCCCCCHHHHHHHHHHHHHHCCCEEEEECCCCCCCHHHHCCCCCCCCHHHHHHHHCCCCCCCCCHHHEE
T ss_conf             75445499997688435616889999999977996999788884603341058988840999998728864434250178


Q ss_pred             ----CCCCCCCCC-CC--------HHHHHHHHHHHH--HHCCCEEEEECCCC-------CCCHHHHHHHHHHHHHHHHCC
Q ss_conf             ----321223586-61--------245422899996--51487599865433-------321157789999899876302
Q gi|254780709|r  168 ----DFVCSEIGS-DA--------AALAYEAFKQAQ--AKKVDVLIIDTAGR-------LHNNSILMAGIGKMIRVLKRL  225 (321)
Q Consensus       168 ----~~~~~~~~~-dp--------~~v~~~a~~~a~--~~~~DvvliDTAGR-------~~~~~~lm~EL~ki~~v~~~~  225 (321)
T Consensus       107 ~~g~Gv~CvEsGGPEPGvGCAGRGIItai~lLe~lg~~~~d~D~V~yDVLGDVVCGGFAmPiR~----------------  170 (329)
T cd02033         107 FKRDGVFAMELGGPEVGRGCGGRGIIHGFELLEKLGFHDWDFDYVLLDFLGDVVCGGFGLPIAR----------------  170 (329)
T ss_pred             ECCCCEEEEECCCCCCCCCCCCCCHHHHHHHHHHCCCCCCCCCEEEEECCCCEEECCCCCCCCC----------------
T ss_conf             6259988986679999876788730136678776377525899999922453566463353356----------------


Q ss_pred             CCCCCCEEEEECCCCC-----CHHHHHHHHHHHHH---CCCCEEEEECCCCCCCHHHHHHHHHHHCCCEEE
Q ss_conf             2234301123102335-----22577899987643---589769996545787069999999997698899
Q gi|254780709|r  226 DPHAPHSVLQVLDATT-----GQNALRQVEMFHAV---AGTTGLIMTKMDGTARGGGLIPIVVTHKIPVYF  288 (321)
Q Consensus       226 ~~~~p~~~~lVlda~~-----gq~~~~~a~~F~~~---~~~~g~I~TKlD~ta~~G~~ls~~~~~~~Pi~f  288 (321)
T Consensus       171 --g~A~evyIVtSgE~MalyAANNI~~~i~~~a~~gg~vrl~GlI~N~~~~~~---e~e~fa~~~g~~~l~  236 (329)
T cd02033         171 --DMAQKVIVVGSNDLQSLYVANNVCNAVEYFRKLGGNVGVAGMVINKDDGTG---EAQAFAAHAGIPILA  236 (329)
T ss_pred             --CCCCEEEEEECCCHHHHHHHHHHHHHHHHHHHCCCCCCEEEEEEECCCCCH---HHHHHHHHCCCCEEE
T ss_conf             --876289999678088999887899999999863897101159860688724---999999971995799