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