>cd04250 AAK_NAGK-C AAK_NAGK-C: N-Acetyl-L-glutamate kinase - cyclic (NAGK-C) catalyzes the phosphorylation of the gamma-COOH group of N-acetyl-L-glutamate (NAG) by ATP in the second step of arginine biosynthesis found in some bacteria and photosynthetic organisms using the non-acetylated, cyclic route of ornithine biosynthesis. In this pathway, glutamate is first N-acetylated and then phosphorylated by NAGK to give phosphoryl NAG, which is converted to NAG-ornithine. There are two variants of this pathway. In one, typified by the pathway in Thermotoga maritima and Pseudomonas aeruginosa, the acetyl group is recycled by reversible transacetylation from acetylornithine to glutamate. The phosphorylation of NAG by NAGK is feedback inhibited by arginine. In photosynthetic organisms, NAGK is the target of the nitrogen-signaling protein PII. Hexameric formation of NAGK domains appears to be essential to both arginine inhibition and NAGK-PII complex formation. NAGK-C are members of the Amino A

Probab=100.00 E-value=0 Score=283.06 Aligned_cols=140 Identities=59% Similarity=0.955 Sum_probs=137.0 Q ss_pred CCCCCCEEEECHHHHHHHHHCCCEEEECCCCCCCCCCEECCCHHHHHHHHHHHHCHHHHHHHCCCCCEEEC---CCCCCC Q ss_conf 98552013556999999997798499857431787320066147999999986251133432267633534---555556 Q 537021.9.peg.3 1 LGFVGNVIKVNRTILDLLIKSGIIPVIAPIAPGYDGATYNINADTFAGAIAEKLNVIRLLFLTDVPGVLDK---NRQLIS 77 (142) Q Consensus 1 ~g~~G~v~~vd~~~i~~lL~~g~iPVi~pig~~~~G~~~nin~D~~a~~lA~~l~A~kli~ltdv~Gv~d~---~~~~i~ 77 (142) T Consensus 137 ~g~vG~v~~vd~~~i~~ll~~g~IpVIsplg~~~~G~~~NvnaD~~A~~lA~aL~AdkLi~ltdv~Gv~~~~~~~~~~i~ 216 (279) T cd04250 137 LGFVGEVTEVNPELLETLLEAGYIPVIAPVGVGEDGETYNINADTAAGAIAAALKAEKLILLTDVAGVLDDPNDPGSLIS 216 (279) T ss_pred CCCCCCCCCCCHHHHHHHHHCCCEEEECCCCCCCCCCEECCCHHHHHHHHHHHHHHCCEEEEECCCCCCCCCCCCCCCCC T ss_conf 66456655227899999985797489646416898978668899999999998644949999588111058888754002 Q ss_pred CCCHHHHHHHHHCCCCCCCHHHHHHHHHHHHHCCCCEEEEEECCCCCHHHHHHHCCCCCCCEE Q ss_conf 338889999962697678678999999999984998899952578768999996799866345 Q 537021.9.peg.3 78 KLSINEARTLIKDGTISGGMIPKIETSIKAIENGVKSVAILDGKKPHSILMEIFTKNGSGTLL 140 (142) Q Consensus 78 ~i~~~e~~~l~~~~~~~~gm~~Ki~~a~~a~~~Gv~~v~i~~~~~~~~ll~elft~~g~GT~i 140 (142) T Consensus 217 ~lt~~e~~~li~~~~i~ggM~pKl~aa~~Al~~GV~rvhIidg~~~~~LL~ELft~~G~GT~I 279 (279) T cd04250 217 EISLKEAEELIADGIISGGMIPKVEACIEALEGGVKAAHIIDGRVPHSLLLEIFTDEGIGTMI 279 (279) T ss_pred CCCHHHHHHHHHCCCCCCCCHHHHHHHHHHHHCCCCEEEEECCCCCCHHHHHHHCCCCCCCCC T ss_conf 589999999997597689749999999999984999799946989887999981799986609

HHsearch alignment for GI: peg_394 and conserved domain: cd04250