RPSBLAST alignment for GI: 254780151 and conserved domain: cd00553

>gnl|CDD|30166 cd00553, NAD_synthase, NAD+ synthase is a homodimer, which catalyzes the final step in de novo nicotinamide adenine dinucleotide (NAD+) biosynthesis, an amide transfer from either ammonia or glutamine to nicotinic acid adenine dinucleotide (NaAD). The conversion of NaAD to NAD+ occurs via an NAD-adenylate intermediate and requires ATP and Mg2+. The intemediate is subsequently cleaved into NAD+ and AMP. In many prokaryotes, such as E. coli , NAD synthetase consists of a single domain and is strictly ammonia dependent. In contrast, eukaryotes and other prokaryotes have an additional N-terminal amidohydrolase domain that prefer glutamine, Interestingly, NAD+ synthases in these prokaryotes, can also utilize ammonia as an amide source .. Length = 248
 Score = 49.0 bits (117), Expect = 2e-06
 Identities = 49/219 (22%), Positives = 83/219 (37%), Gaps = 67/219 (30%)

Query: 23  VVVAMSGGVDSSVVAALLKR--DGYDVIGVTLQLYNSRKASKRKGSCCAGQDVYDARRVC 80
           VV+ +SGG+DS++VAAL  R     +V+ + +    S + ++            DA+ + 
Sbjct: 26  VVLGLSGGIDSALVAALAVRALGRENVLALFMPSRYSSEETRE-----------DAKELA 74

Query: 81  DTINVSHYVFDYEERFRNAVIVPFASSYAAGETPLPCVDCNRTVK--------FSDLLSV 132
           + + + H   D         I P   ++ A        +                 L ++
Sbjct: 75  EALGIEHVNID---------IDPAVEAFLALLGESGGSELEDLALGNIQARLRMVILYAL 125

Query: 133 TRQLGADVLATGHYIRSRLYVG-----DDGKRRRIMCRPMDLERDQSYFLFATTQQQLCD 187
             +LG  VL TG+  +S L +G      DG                             D
Sbjct: 126 ANKLGGLVLGTGN--KSELLLGYFTKYGDG---------------------------AAD 156

Query: 188 LRFPLGDMKKESVRDLAREMGL--DIADKSDSQDICFVQ 224
           +  P+GD+ K  VR+LAR +G+   I DK  S ++   Q
Sbjct: 157 IN-PIGDLYKTQVRELARYLGVPESIIDKPPSAELWPGQ 194