>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=99.64 E-value=3.1e-14 Score=115.72 Aligned_cols=222 Identities=22% Similarity=0.276 Sum_probs=145.3 Q ss_pred CEEEEEECCCCCCCHHHHHHHHHHHHHHHHCCCCEEEEEECCCCHHHHHHHHHHHHHCCC-----CHHHHHHHH--HHHH Q ss_conf 669996085845888999999999999996799889998068730489999999861489-----988999999--8312 Q gi|254780873|r 2 ARIVMKFGGTSVANIDCIRSAALHVKREVDRGQEVAMVVSAMSGETDRLAELCRQVTSID-----NARERDVVI--STGE 74 (411) Q Consensus 2 ~~iV~KfGGtSv~~~~~i~~v~~~i~~~~~~g~~~ivVvSA~~g~Td~L~~l~~~~~~~~-----~~~~~d~i~--s~GE 74 (411) T Consensus 15 ktiVIklGG~~l~d~~~~~~~~~dI~~L~~~G~~vVlVHGggpqi~~~l~~~gi~~~~~~G~RvT~~~~l~iv~~~l~G~ 94 (279) T cd04250 15 KTVVIKYGGNAMKDEELKESFARDIVLLKYVGINPVVVHGGGPEINEMLKKLGIESEFVNGLRVTDEETMEIVEMVLVGK 94 (279) T ss_pred CEEEEEECHHHHCCHHHHHHHHHHHHHHHHCCCEEEEEECCCHHHHHHHHHCCCCCCCCCCCCCCCHHHHHHHHHHHHCC T ss_conf 98999989078469779999999999999889929999699679999999869984223774357388899999998561 Q ss_pred HHHHHHHHHHHHHCCCCCCCCCCCCCCCCCCC-----------CCCC-CCCCCCCCCCHHHHHHHCCEEEEECCCCCCCC Q ss_conf 99999999999843998635673324551213-----------3552-00012362100334310680586034333556 Q gi|254780873|r 75 QVSSGLMVLALQSLGIQAISLQGWQIPIMTDS-----------LHGM-ARICRVDEKKIVTHLKKKQVVVITGFQGLSHD 142 (411) Q Consensus 75 ~~s~~l~a~~l~~~G~~a~~l~~~~~~i~t~~-----------~~~~-a~~~~~~~~~l~~~l~~~~v~v~~Gf~g~~~~ 142 (411) T Consensus 95 -vn~~l-v~~l~~~g~~avglsg~dg~~i~a~~~~~~~~~~~~D~g~vG~v~~vd~~~i~~ll~~g~IpVIsp-lg~~~~ 171 (279) T cd04250 95 -VNKEI-VSLINRAGGKAVGLSGKDGNLIKAKKKDATVIEEIIDLGFVGEVTEVNPELLETLLEAGYIPVIAP-VGVGED 171 (279) T ss_pred -HHHHH-HHHHHHCCCCEEECCCCCCCEEEEEECCCCCCCCCCCCCCCCCCCCCCHHHHHHHHHCCCEEEECC-CCCCCC T ss_conf -46999-999997399854622666866999975555555566566456655227899999985797489646-416898 Q ss_pred CCEEEECCCCCCHHHHHHHHHHCHHHHHHHCCHHHHEECCCCCCCCCCEECCCCHHHHHHHHHCC----CCCHHHHHHHH Q ss_conf 84244306862428999998847345565346144024584212344110567999999988403----11013788764 Q gi|254780873|r 143 NSVTTLGRGGSDTSAVAIAAAIKADRCDIYTDVCGIYTTDPRIEPKAHLMKKISFEEMLEMSSLG----AKVMQVRSVEL 218 (411) Q Consensus 143 g~~ttlgRGGSD~tA~~ia~~l~A~~~~i~tdV~Gi~taDPr~v~~a~~i~~lsy~Ea~eLa~~G----akvlhp~~~~~ 218 (411) T Consensus 172 G~~~Nvn---aD~~A~~lA~aL~AdkLi~ltdv~Gv~~~~~~---~~~~i~~lt~~e~~~li~~~~i~ggM~pKl~aa~~ 245 (279) T cd04250 172 GETYNIN---ADTAAGAIAAALKAEKLILLTDVAGVLDDPND---PGSLISEISLKEAEELIADGIISGGMIPKVEACIE 245 (279) T ss_pred CCEECCC---HHHHHHHHHHHHHHCCEEEEECCCCCCCCCCC---CCCCCCCCCHHHHHHHHHCCCCCCCCHHHHHHHHH T ss_conf 9786688---99999999998644949999588111058888---75400258999999999759768974999999999 Q ss_pred HHHCCC-EEEEECCC Q ss_conf 331385-26761123 Q gi|254780873|r 219 AMLYKM-CLFVRSSF 232 (411) Q Consensus 219 ~~~~~i-pi~i~ntf 232 (411) T Consensus 246 Al~~GV~rvhIidg~ 260 (279) T cd04250 246 ALEGGVKAAHIIDGR 260 (279) T ss_pred HHHCCCCEEEEECCC T ss_conf 998499979994698

HHsearch alignment for GI: 254780873 and conserved domain: cd04250