RPSBLAST alignment for GI: 254780414 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 = 46.4 bits (110), Expect = 2e-05
 Identities = 38/229 (16%), Positives = 71/229 (31%), Gaps = 81/229 (35%)

Query: 208 YHKEIVSRIKEQV---GNERVICAVSGGVDSTVAAFLIYEAIGINLTCVLVDHGFMRKNE 264
               +V  +++ +   G + V+  +SGG+DS + A L   A+G                 
Sbjct: 6   IINALVLFLRDYLRKSGFKGVVLGLSGGIDSALVAALAVRALGR---------------- 49

Query: 265 VENIISLFKGYPNFPLRVVDASERFIRKLKNI---VDPETKRKVIGQLFIEVFEEEAKKI 321
            EN+++LF           + ++     L      +D +   +    L  E    E + +
Sbjct: 50  -ENVLALFMPSRYSSEETREDAKELAEALGIEHVNIDIDPAVEAFLALLGESGGSELEDL 108

Query: 322 --GGAQ----------------------------FLGQGTLYPDVIESISFFGGPSSIIK 351
             G  Q                             LG  T Y D                
Sbjct: 109 ALGNIQARLRMVILYALANKLGGLVLGTGNKSELLLGYFTKYGD---------------- 152

Query: 352 SHHNVGGLPEHMDMKLVEPLKELFKDEVRLLGKELRLPDSFVERHPCPG 400
                           + P+ +L+K +VR L + L +P+S +++ P   
Sbjct: 153 ------------GAADINPIGDLYKTQVRELARYLGVPESIIDKPPSAE 189