>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=97.01 E-value=0.0025 Score=39.60 Aligned_cols=209 Identities=18% Similarity=0.260 Sum_probs=97.7 Q ss_pred CEEEEECCCCHHHHHHHHHHHHHCCCEEEEE-ECCCC-CCCHHHHHHHHCCCCEE-EEE-CCCCC--HHHHHHHH-HHCC Q ss_conf 9489976788277999999998689879999-47887-65856777620379749-997-63889--99999998-6227 Q gi|254780920|r 1 MRLIVTGGAGFIGSALCRYLVNDLKIQVLVI-DKLTY-AGNLNSLKEISQSNLFS-FLQ-VDICD--RECIRSAL-KEFQ 73 (358) Q Consensus 1 MkILItG~tGfIGs~l~~~Ll~~~~~~V~~~-d~~~~-~~~~~~~~~~~~~~~v~-~i~-~Di~d--~~~l~~~~-~~~~ 73 (358) T Consensus 1 ~~V~IvGAsGYtG~EL~RLL~~HP~~e~~~~~ss~~~~aG~--~~~~~--~P~L~g~~~~~~~~~~~~~~~~~~~L~~~- 75 (361) T TIGR01850 1 IKVGIVGASGYTGGELLRLLANHPEVEITYLVSSRESLAGK--PLSEV--HPHLRGLVDYLNLEPLDDAKLEEIELEDA- 75 (361) T ss_pred CEEEEEECCCHHHHHHHHHHHCCCCEEEEEEEEEEEHHCCC--CHHHH--CCCHHHHHCCCCCCCCCHHHHHHHHHCCC- T ss_conf 96899933444689999998419953788888762011385--25773--66111010023336667667888621376- Q ss_pred CCEEEEECCCCCCCCCCCCCCCCCCCCCCCCCHHHHHHHHHCCCCCCCCCCCEEEEECCCCCCCCCCCCCCCCCCCCCCC Q ss_conf 87178512343322222222222222222220247888651232211247842786305543112222222222222222 Q gi|254780920|r 74 PDAIVNFAAESHVDRSILGADEFITTNIIGTFILLEETRLWWSCLSQDKKDQFRFLQISTDEVYGSLDKGLFSEDMPYNP 153 (358) Q Consensus 74 ~d~ViHlAa~~~~~~~~~~p~~~~~~Nv~gt~nil~~~~~~~~~~~~~~~~~~~~v~~SS~~vYg~~~~~~~~E~~~~~p 153 (358) T Consensus 76 -DvVF-lAlPhgvs~~~~-p------------~~l--------------~~g~~ViDLSADFRl~d~--------~~Y-- 116 (361) T TIGR01850 76 -DVVF-LALPHGVSMELA-P------------ELL--------------EAGVKVIDLSADFRLKDP--------EVY-- 116 (361) T ss_pred -CEEE-ECCCHHHHHHHH-H------------HHH--------------HCCCEEEECCCCCCCCCH--------HHH-- T ss_conf -7899-868725569999-9------------998--------------479869988834336997--------999-- Q ss_pred CCCCCCCCCCCEEEECCCCCCCCCC--CCCCCCCCCCC-CCCCCCC----CCCCCCCCCCCCCC-CCCCCCCCCCCCCCC Q ss_conf 2222333221000000123332222--22222222233-3222222----22222222222222-222222233221133 Q gi|254780920|r 154 SSPYSATKASSDYLVLAWGHTYGIP--VLLSNCSNNYG-PYHFPEK----LIPLAITRMIEGSH-VFLYGDGQNVRDWLY 225 (358) Q Consensus 154 ~s~Yg~sK~~~E~~~~~~~~~~~l~--~~ilR~~~vyG-p~~~~~~----~i~~~i~~~~~g~~-~~i~g~g~~~Rdfi~ 225 (358) T Consensus 117 e~wYG~-h~~~~ll~~avYGLpEl~~~re~i~~A~liAnPGCYpTA~~LaL~PL~~~~l~~~~~~~-------------- 181 (361) T TIGR01850 117 EKWYGF-HAAPELLQEAVYGLPELHGAREEIKGARLIANPGCYPTATLLALAPLLKEGLIDPTSEI-------------- 181 (361) T ss_pred HHHCCC-CCCHHHHHHCCCCCCCCCHHHHHHHCCCEEECCCCHHHHHHHHHHHHHHHCCCCCCCCE-------------- T ss_conf 996677-88966663115567670105889842957644886178999998999983156767765-------------- Q ss_pred CCCCCCCEEECCCCCC----------CCCCCCCCCCCCCCHHHHHHHHHHHHCC Q ss_conf 2222000000012222----------2221113578642026889999886034 Q gi|254780920|r 226 VEDHVRALYLVLKKGR----------IGERYNIGGNNERKNIDIVFEIGFLLDA 269 (358) Q Consensus 226 v~D~a~~i~~~~~~~~----------~~~~fNigs~~~~s~~e~~~~i~~~~~~ 269 (358) T Consensus 182 i~dakSGvSGAGr~as~~~~~~E~~en~~pY~~~G~H-RH~PEI~q~L~~~~~~ 234 (361) T TIGR01850 182 IVDAKSGVSGAGRKASEKSHFPEVNENLRPYKVTGGH-RHTPEIEQELGKLAGG 234 (361) T ss_pred EEEEEECCCCCCCCCCCCCCHHHHHCCCEECCCCCCC-CCHHHHHHHHHHHHCC T ss_conf 8988744556677776335734432770620379985-0279999987676304

HHsearch alignment for GI: 254780920 and conserved domain: TIGR01850