RPSBLAST alignment for GI: 254780831 and conserved domain: cd02033

>gnl|CDD|48363 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.. Length = 329
 Score = 48.1 bits (114), Expect = 4e-06
 Identities = 69/254 (27%), Positives = 110/254 (43%), Gaps = 51/254 (20%)

Query: 78  TLTENKNPPQQRNNLNVKKFVAVASGKGGVGKSTTVVNIACALKNKGKNVAILDADVYGP 137
           TL     PP ++  +     +A+  GKGG+GKS T+ N++  +  +GK V ++  D    
Sbjct: 19  TLEIPTAPPTKKTQI-----IAI-YGKGGIGKSFTLANLSYMMAQQGKRVLLIGCDPKSD 72

Query: 138 SIPKLLKISGK-----VEISDKKFLKPKENYGIKIMSMASLVDENVAMIWRGPMV----- 187
           +   L    GK     +E S KK L  +E   ++I  +    D   AM   GP V     
Sbjct: 73  TTSLLF--GGKACPTIIETSAKKKLAGEE---VQIGDVCFKRDGVFAMELGGPEVGRGCG 127

Query: 188 QSAIMHMLHNVV------WGQLDFLLIDMPPGT--GDAHLTIAQKIPLSGVVIVSTPQDL 239
              I+H    +       W   D++L+D       G   L IA+   ++  VIV    DL
Sbjct: 128 GRGIIHGFELLEKLGFHDWD-FDYVLLDFLGDVVCGGFGLPIARD--MAQKVIVVGSNDL 184

Query: 240 ALI----DVKRAISMYQKM--NIPIIGMIENMSYFLASDTGKKYDLFGNGGARFEAEKIG 293
             +    +V  A+  ++K+  N+ + GM+ N           K D  G G A+  A   G
Sbjct: 185 QSLYVANNVCNAVEYFRKLGGNVGVAGMVIN-----------KDD--GTGEAQAFAAHAG 231

Query: 294 IPFLESVPFDMDVR 307
           IP L ++P D ++R
Sbjct: 232 IPILAAIPADEELR 245