P51201 (CARA_PORPU) Reviewed, UniProtKB/Swiss-Prot

Names and origin

Protein names

Recommended name:
Carbamoyl-phosphate synthase small chain
EC=6.3.5.5

Alternative name(s):
Carbamoyl-phosphate synthetase glutamine chain

Gene names

Name:

carA

Encoded on

Plastid; Chloroplast

Organism

Porphyra purpurea

Taxonomic identifier

2787 [NCBI]

Taxonomic lineage

Eukaryota › Rhodophyta › Bangiophyceae › Bangiales › Bangiaceae › Porphyra

Protein attributes

Sequence length	384 AA.
Sequence status	Complete.
Protein existence	Inferred from homology

General annotation (Comments)

Catalytic activity	2 ATP + L-glutamine + HCO3- + H2O = 2 ADP + phosphate + L-glutamate + carbamoyl phosphate. HAMAP MF_01209
Pathway	Amino-acid biosynthesis; L-arginine biosynthesis; carbamoyl phosphate from bicarbonate: step 1/1. HAMAP MF_01209 Pyrimidine metabolism; UMP biosynthesis via de novo pathway; (S)-dihydroorotate from bicarbonate: step 1/3. HAMAP MF_01209
Subunit structure	Composed of two chains; the small (or glutamine) chain promotes the hydrolysis of glutamine to ammonia, which is used by the large (or ammonia) chain to synthesize carbamoyl phosphate By similarity.
Subcellular location	Plastid › chloroplast HAMAP MF_01209.
Sequence similarities	Belongs to the CarA family. Contains 1 glutamine amidotransferase type-1 domain.

Ontologies

Keywords
Biological process	Amino-acid biosynthesis Arginine biosynthesis Pyrimidine biosynthesis
Cellular component	Chloroplast Plastid
Domain	Glutamine amidotransferase
Ligand	ATP-binding Nucleotide-binding
Molecular function	Ligase
Gene Ontology (GO)
Biological process	arginine biosynthetic process Inferred from electronic annotation. Source: UniProtKB-KW glutamine metabolic process Inferred from electronic annotation. Source: UniProtKB-KW pyrimidine nucleotide biosynthetic process Inferred from electronic annotation. Source: UniProtKB-KW
Cellular component	chloroplast Inferred from electronic annotation. Source: UniProtKB-SubCell
Molecular function	ATP binding Inferred from electronic annotation. Source: UniProtKB-KW carbamoyl-phosphate synthase (glutamine-hydrolyzing) activity Inferred from electronic annotation. Source: EC
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 384	384	Carbamoyl-phosphate synthase small chain HAMAP MF_01209		PRO_0000112371
Regions
	Domain	196 – 382	187	Glutamine amidotransferase type-1
	Region	1 – 192	192	CPSase HAMAP MF_01209
Sites
	Active site	272	1	Nucleophile By similarity
	Active site	355	1	By similarity
	Active site	357	1	By similarity

Sequences

	Sequence		Length	Mass (Da)
	P51201 [UniParc]. Last modified October 1, 1996. Version 1. Checksum: D0C45C21FB28E56B	FASTA	384	43,296
	10 20 30 40 50 60 MIKKIPAILV LEDGTYYKGW SFQADQSIVT IGEVVFNTGM TGYQEIITDP SYFQQIVTFT 70 80 90 100 110 120 YPEIGNTGIN SEDIESQTIS IKGLVAKNIC KISSSWRQQE SLVQYLNRYK IPFIFGIDTR 130 140 150 160 170 180 SLTQYLRRSG TMNGCISNKN LNHAYLQRKI SEVPHMTGLD LIPNVTTNIM YDWDEKSLPS 190 200 210 220 230 240 WYLADRNREK IYSQLKVIVI DFGVKLNILR RLATLGCQIT VMPASTPTQD ILSCKPDGIL 250 260 270 280 290 300 LSNGPGDPSA VNYGIKTVKE LLNQNIPIFG ICMGHQILNL ALEAKTFKLK FGHRGINHPS 310 320 330 340 350 360 GLKQQVEITS QNHGFAVDLQ SVLKLSLQVT HFNLNDITVA GTGHSRSPYF SVQYHPESSP 370 380 GPHDADYLFE YFIEIMKQFR KEAN

References

[1]	"Complete nucleotide sequence of the Porphyra purpurea chloroplast genome." Reith M.E., Munholland J. Plant Mol. Biol. Rep. 13:333-335(1995) Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: Avonport.
+	Additional computationally mapped references.

Cross-references

Sequence databases
EMBL GenBank DDBJ	U38804 Genomic DNA. Translation: AAC08087.1.
PIR	S73122.
RefSeq	NP_053811.1. NC_000925.1.
3D structure databases
ProteinModelPortal	P51201.
ModBase	Search...
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Genome annotation databases
GeneID	809825.
Phylogenomic databases
ProtClustDB	CHL00197.
Family and domain databases
HAMAP	MF_01209. CPSase_S_chain. [Tree]
InterPro	IPR006274. CarbamoylP_synth_ssu. IPR002474. CarbamoylP_synth_ssu_N. IPR017926. GATASE_1. [Graphical view]
Gene3D	G3DSA:3.50.30.20. G3DSA:3.50.30.20. 1 hit.
PANTHER	PTHR11405:SF4. CarA_synth_small. 1 hit.
Pfam	PF00988. CPSase_sm_chain. 1 hit. PF00117. GATase. 1 hit. [Graphical view]
SMART	SM01097. CPSase_sm_chain. 1 hit. [Graphical view]
SUPFAM	SSF52021. CP_synthsmall. 1 hit.
TIGRFAMs	TIGR01368. CPSaseIIsmall. 1 hit.
PROSITE	PS51273. GATASE_TYPE_1. 1 hit. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

CARA_PORPU

Accession

Primary (citable) accession number: P51201

Entry history

Integrated into UniProtKB/Swiss-Prot:	October 1, 1996
Last sequence update:	October 1, 1996
Last modified:	January 25, 2012
This is version 76 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)