>TIGR01850 argC N-acetyl-gamma-glutamyl-phosphate reductase; InterPro: IPR000706 N -Acetylglutamate (NAG) fulfils distinct biological roles in lower and higher organisms. In prokaryotes, lower eukaryotes and plants it is the first intermediate in the biosynthesis of arginine, whereas in ureotelic (excreting nitrogen mostly in the form of urea) vertebrates, it is an essential allosteric cofactor for carbamyl phosphate synthetase I (CPSI), the first enzyme of the urea cycle. The pathway that leads from glutamate to arginine in lower organisms employs eight steps, starting with the acetylation of glutamate to form NAG. In these species, NAG can be produced by two enzymatic reactions: one catalysed by NAG synthase (NAGS) and the other by ornithine acetyltransferase (OAT). In ureotelic species, NAG is produced exclusively by NAGS. In lower organisms, NAGS is feedback-inhibited by L-arginine, whereas mammalian NAGS activity is significantly enhanced by this amino acid. The NAGS genes of bacteria, fungi and mammals are more diverse than other arginine-biosynthesis and urea-cycle genes. The evolutionary relationship between the distinctly different roles of NAG and its metabolism in lower and higher organisms remains to be determined . The pathway from glutamate to arginine is: NAGS; N-acetylglutamate synthase (2.3.1.1 from EC) (glutamate to N-acetylglutamate) NAGK; N-acetylglutamate kinase (2.7.2.8 from EC) (N-acetylglutamate to N-acetylglutamate-5P) NAGSA; N-acetyl-gamma-glutamyl-phosphate reductase (1.2.1.38 from EC) (N-acetylglutamate-5P to N-acetylglumate semialdehyde) Acetylornithine aminotransferase (2.6.1.11 from EC) (N-acetylglumate semialdehyde to N-acetylornithine) Acetylornithine deacetylase (3.5.1.16 from EC) (N-acetylornithine to ornithine) Arginase (3.5.3.1 from EC) (ornithine to arginine) N-acetyl-gamma-glutamyl-phosphate reductase (1.2.1.38 from EC) (AGPR) , is the enzyme that catalyzes the third step in the biosynthesis of arginine from glutamate, the NADP-dependent reduction of N-acetyl-5-glutamyl phosphate into N-acetylglutamate 5-semialdehyde. In bacteria it is a monofunctional protein of 35 to 38 kD (gene argC), while in fungi it is part of a bifunctional mitochondrial enzyme (gene ARG5,6, arg11 or arg-6) which contains a N-terminal acetylglutamate kinase (2.7.2.8 from EC) domain and a C-terminal AGPR domain. In the Escherichia coli enzyme, a cysteine has been shown to be implicated in the catalytic activity, and the region around this residue is well conserved.; GO: 0003942 N-acetyl-gamma-glutamyl-phosphate reductase activity, 0006526 arginine biosynthetic process.

Probab=100.00 E-value=0 Score=571.09 Aligned_cols=303 Identities=25% Similarity=0.369 Sum_probs=251.9 Q ss_pred EEEEEECCCCHHHHHHHHHHHHCCCCEEEEEEEECCCC--CCEEEECC------CCE-EEEEECCH---HHH--CCCCEE Q ss_conf 17999816677899999999744998078999974765--87560027------815-89987794---363--188478 Q gi|254780307|r 3 FKVAVVGATGNVGREMLNIICERGFPISEVVALASERS--AGTKVPFG------KET-IDVQDVKS---YDF--SDTDIC 68 (335) Q Consensus 3 ~kvaIiGatG~vG~el~~lL~~~~~p~~~l~~~~s~~~--~G~~i~~~------~~~-~~~~~~~~---~~~--~~~Div 68 (335) T Consensus 1 ~~V~IvGAsGYtG~EL~RLL~--~HP~~e~~~~~ss~~~~aG~~~~~~~P~L~g~~~~~~~~~~~~~~~~~~~L~~~DvV 78 (361) T TIGR01850 1 IKVGIVGASGYTGGELLRLLA--NHPEVEITYLVSSRESLAGKPLSEVHPHLRGLVDYLNLEPLDDAKLEEIELEDADVV 78 (361) T ss_pred CEEEEEECCCHHHHHHHHHHH--CCCCEEEEEEEEEEEHHCCCCHHHHCCCHHHHHCCCCCCCCCHHHHHHHHHCCCCEE T ss_conf 968999334446899999984--199537888887620113852577366111010023336667667888621376789 Q ss_pred EECCCHHHHHHHHHHHCCCCEEEEECCCCHHCCC------------------CCCCCCCCHH--HHHHCCCCCCCEECCC Q ss_conf 6068758999999750456517996145100112------------------1112364101--1111033343121267 Q gi|254780307|r 69 LMSAGHAVSSQMSPKIAANGCIVIDNSSAWRYDS------------------DVPLIVPEVN--PQTISLASRKNIIANP 128 (335) Q Consensus 69 f~a~p~~~s~~~~~~~~~~g~~VIDlS~~~R~~~------------------d~p~~lPein--~~~i~~~~~~~~VanP 128 (335) T Consensus 79 FlAlPhgvs~~~~p~~l~~g~~ViDLSADFRl~d~~~Ye~wYG~h~~~~ll~~avYGLpEl~~~re~i~~A~---liAnP 155 (361) T TIGR01850 79 FLALPHGVSMELAPELLEAGVKVIDLSADFRLKDPEVYEKWYGFHAAPELLQEAVYGLPELHGAREEIKGAR---LIANP 155 (361) T ss_pred EECCCHHHHHHHHHHHHHCCCEEEECCCCCCCCCHHHHHHHCCCCCCHHHHHHCCCCCCCCCHHHHHHHCCC---EEECC T ss_conf 986872556999999984798699888343369979999966778896666311556767010588984295---76448 Q ss_pred CCCCCCCCCCCCHHHHCCCCC---CEEEEECCCCCCCCCCCCCCHHHHHHHHCCCCCCCCCCCCCCCCCCCCCCCCCCCC Q ss_conf 643222111220011017874---11465215221123211000000000000124554444551013740422553234 Q gi|254780307|r 129 NCSTIQLVVALKPLHDLAMIK---RVVVTTYQSVSGAGKKGIDELLAQTKAFLAKKTIENRVFTKNIAFNVIPHIDVFMD 205 (335) Q Consensus 129 gC~at~~~l~L~PL~~~~~i~---~v~v~s~~g~SGaG~~~~~eL~~q~~~~~~~~~~~~~~~~~~la~n~iP~i~~~~~ 205 (335) T Consensus 156 GCYpTA~~LaL~PL~~~~l~~~~~~~i~dakSGvSGAGr~as~----------------~~~~-~E~~en~~pY~--~~- 215 (361) T TIGR01850 156 GCYPTATLLALAPLLKEGLIDPTSEIIVDAKSGVSGAGRKASE----------------KSHF-PEVNENLRPYK--VT- 215 (361) T ss_pred CCHHHHHHHHHHHHHHHCCCCCCCCEEEEEEECCCCCCCCCCC----------------CCCH-HHHHCCCEECC--CC- T ss_conf 8617899999899998315676776589887445566777763----------------3573-44327706203--79- Q ss_pred CCCCCHHHHEEEEEEEEECC--CCCCCCCCEEEEEEECCEEEEEEEECCC-CCHHHHHHHHHHCCCCE-EECCCC--CCC Q ss_conf 72000011011210001023--4322112001121102157987672465-87899987310069838-810268--899 Q gi|254780307|r 206 GGSTKEEWKVLVETQKILDP--NIKVSCTAARVPVFIGHAESVNIEFEKD-ISIKDAVAAINKSKGCI-VVDKPD--KNE 279 (335) Q Consensus 206 ~g~~~ee~k~~~E~~kil~~--~~~v~~t~~~vPv~rG~~~ti~i~l~~~-~~~~~i~~~~~~~~~~~-~~~~~~--~~~ 279 (335) T Consensus 216 -G~HRH~PEI~q~L~~~~~~~~~~~v~FTPHL~P~~RGIl~T~~~~l~~~~~~~~~~~~~Y~~~Y~~epFVrv~~~G~~~ 294 (361) T TIGR01850 216 -GGHRHTPEIEQELGKLAGGIDKVKVSFTPHLVPMTRGILATIYAKLKDGSLTEEDLRKLYEEFYADEPFVRVLPKGEGE 294 (361) T ss_pred -CCCCCHHHHHHHHHHHHCCCCCEEEEEEEEECCCCCCCEEEEEEEECCCCCCHHHHHHHHHHHHCCCCEEEEECCCCCC T ss_conf -9850279999987676304487279998631262353201276872689988899999999971279717982277898 Q ss_pred CCCHHHHCCCCCEEEEEEEECCCCCCEEEEEEEECCHHHHHHHHHHHHHHHHH Q ss_conf 97615434897326752776366888699999701302236799999999988 Q gi|254780307|r 280 YITPVESIRRDLVFVSRIRKDPTLKSGLNLWIVANNLRKGAALNAVQIAELVA 332 (335) Q Consensus 280 ~~~~~~~~g~~~v~Vgrvr~~~~~~~~~~~~~~~DNL~kGAAg~AVq~anlm~ 332 (335) T Consensus 295 ~P~tk~V~GsN~cdIGG~~~d~~~-~r~vv~SaIDNLvKGAAGQAvQN~N~m~ 346 (361) T TIGR01850 295 YPSTKAVRGSNFCDIGGFAVDERT-GRVVVVSAIDNLVKGAAGQAVQNMNLMF 346 (361) T ss_pred CCCEEEEEECCCEEEEEEEEECCC-CEEEEEEECCHHHHHHHHHHHHHHHHHC T ss_conf 786147753583887337886578-8899998521124679999999998635

HHsearch alignment for GI: 254780307 and conserved domain: TIGR01850