HHsearch alignment for GI: 254780812 and conserved domain: TIGR00078

>TIGR00078 nadC nicotinate-nucleotide pyrophosphorylase; InterPro: IPR004393 Nicotinate-nucleotide pyrophosphorylase (2.4.2.19 from EC), also known as quinolinate phosphoribosyltransferase (decarboxylating), catalyses the conversion of nicotinate D-ribonucleotide, pyrophosphate and carbon dioxide into pyridine-2,3-dicarboxylate and 5-phospho-alpha-D-ribose 1-diphosphate. This enzyme is a type II phosphoribosyltransferase which provides the de novo source of nicotinate mononucleotide (NAMN) for NAD biosynthesis in both prokaryotes and eukaryotes , . Structural studies have shown that the active form of this enzyme is a homodimer with an unsual fold , , . The N-terminal forms a mixed alpha/beta domain, while the C-terminal region forms a multi-stranded, open alpha/beta barrel. The active site is found at the C-terminal ends of the beta strands of the alpha/beta barrel, and is bordered by the N-terminal domain of the second subunit of the dimer. It contains several conserved charged residues thought to be important determinants of substrate binding and catalysis. ; GO: 0004514 nicotinate-nucleotide diphosphorylase (carboxylating) activity, 0019363 pyridine nucleotide biosynthetic process.
Probab=92.88  E-value=0.2  Score=30.85  Aligned_cols=64  Identities=19%  Similarity=0.337  Sum_probs=46.5

Q ss_pred             HHHHHHCCCCEEEECCCCHHHCCHHHHHHHHCCCHHHHHHHHHHHCCCCEEECCCCCCC-CCHHHHHCCCCCCEEECCCC
Q ss_conf             77777549816784383110068356777612722689999863088623602431100-00134201478722304677
Q gi|254780812|r  192 LIAQIHAGVDVIQIFDTHAGCLGEHEFENYAARSVGRIISAVRRKYPNAKFISFAKGAG-YMLKNYRRLTDSNAIGLDWS  270 (346)
Q Consensus       192 l~~Qi~aGad~iqIFDs~ag~Ls~~~f~~f~~p~~kkI~~~ik~~~~~vpiI~f~~g~~-~~l~~~~~~~g~d~isiD~~  270 (346)
T Consensus       199 a~eA~~AGADiImL-DN----m~p~~--------~~~av~~~~~~~p~~-~~EaSGGitl~n~~~ya~-~gVD~IS~G~l  263 (276)
T TIGR00078       199 AEEAAEAGADIIML-DN----MKPEE--------IKEAVELLKGRNPNV-LVEASGGITLDNIEEYAE-TGVDVISSGAL  263 (276)
T ss_pred             HHHHHHCCCCEEEC-CC----CCHHH--------HHHHHHHHHHCCCEE-EEEEECCCCHHHHHHHHH-CCCCEEECCCH
T ss_conf             99999709959980-69----89479--------999999997029908-999836998789999840-89758832741