Reviewed, UniProtKB/Swiss-Prot A8A9W2 (RTCA_IGNH4)

Names and origin

Protein names

Recommended name:
    Probable RNA 3'-terminal phosphate cyclase
      Short name=RNA-3'-phosphate cyclase
      Short name=RNA cyclase
    EC=6.5.1.4

Gene names

Name:	rtcA
Ordered Locus Names:	Igni_0532

Organism

Ignicoccus hospitalis (strain KIN4/I / DSM 18386 / JCM 14125) [Complete proteome] [HAMAP]

Taxonomic identifier

453591 [NCBI]

Taxonomic lineage

Archaea › Crenarchaeota › Thermoprotei › Desulfurococcales › Desulfurococcaceae › Ignicoccus

Protein attributes

Sequence length	353 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is not processed.
Protein existence	Inferred from homology.

General annotation (Comments)

Function	Catalyzes the conversion of 3'-phosphate to a 2',3'-cyclic phosphodiester at the end of RNA. The mechanism of action of the enzyme occurs in 3 steps: (A) adenylation of the enzyme by ATP; (B) the enzyme acts on RNA-N3'P to produce RNA-N3'PP5'A; (C) a non catalytic nucleophilic attack by the adjacent 2'hydroxyl on the phosphorus in the diester linkage to produce the cyclic end product. The biological role of this enzyme is unknown but it is likely to function in some aspects of cellular RNA processing By similarity.
Catalytic activity	ATP + RNA 3'-terminal-phosphate = AMP + diphosphate + RNA terminal-2',3'-cyclic-phosphate. HAMAP MF_00200
Subcellular location	Cytoplasm Potential.
Sequence similarities	Belongs to the RNA 3'-terminal cyclase family. Type 1 subfamily.

Ontologies

Keywords
Cellular component	Cytoplasm
Ligand	ATP-binding Nucleotide-binding
Molecular function	Ligase
Technical term	Complete proteome
Gene Ontology (GO)
Biological process	RNA processing Inferred from electronic annotation. Source: InterPro
Cellular component	cytoplasm Inferred from electronic annotation. Source: UniProtKB-SubCell
Molecular function	ATP binding Inferred from electronic annotation. Source: UniProtKB-KW RNA-3'-phosphate cyclase activity Inferred from electronic annotation. Source: HAMAP
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 353	353	Probable RNA 3'-terminal phosphate cyclase HAMAP MF_00200		PRO_0000325190
Sites
	Active site	315	1	By similarity

Sequences

	Sequence		Length	Mass (Da)
	A8A9W2-1 [UniParc]. Last modified October 23, 2007. Version 1. Checksum: F513232B42846DA7	FASTA	353	38,695
	10 20 30 40 50 60 MIEIDGSFGE GGGQILRTSV ALSAVTLKPV RIFNIRAKRK NPGLRRQHMV AVKALAEMTD 70 80 90 100 110 120 AEVRGLELGS TEIVFIPKTL KAGTFRFDIG TAGSVSLVLQ AVTPAALFAP GEVRVQLRGG 130 140 150 160 170 180 TDVPMSPPVD YLRFVFYPLL ERFGAKTELV LKRRGHYPKG GGEVEFASRP VDSLTQWGEV 190 200 210 220 230 240 ERGEVLKVRG LSHCVKLPKH VAERQAKAAE EVLKKSGLKN VDIDLEWYPP ERDPHLGPGS 250 260 270 280 290 300 GIVLWAITER SLLGADSLGA RGKRAERVGE EAARKLLEDL STGKALDRHM SDMIVPYVSL 310 320 330 340 350 ACGRTEVGGA ALTMHAWTHV HVVKKFLPEL EVEISGELNK PFVMRVKGVC WQR

References

[1]

"Unicellular symbiosis at high temperature: genomic insights into the Ignicoccus hospitalis - Naoarchaeum equitans relationship." Podar M., Anderson I., Ivanova N., Wall M., Mavrommatis K., Lykidis A., Chen J., Hudson M., Deciu C., Hutchison D., Eads J., Fernandes F., Tamang D., Szeto E., Land M., Lapidus A., Kyrpides N., Chang C. , Saier M., Eisen J., Rachel R., Huber H., Keller M., Richardson P., Stetter K. Submitted (AUG-2007) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].

Cross-references

Sequence databases
EMBLGenBankDDBJ	CP000816 Genomic DNA. Translation: ABU81714.1.
RefSeq	YP_001435121.1.
3D structure databases
ModBase	Search...
Protein-protein interaction databases
STRING	A8A9W2.
Genome annotation databases
GeneID	5562318.
GenomeReviews	Gene locus Igni_0532 in contig CP000816_GR.
KEGG	iho:Igni_0532.
Organism-specific databases
CMR	Search...
Phylogenomic databases
OMA	EIDGSYG.
Family and domain databases
HAMAP	MF_00200. [Tree]
InterPro	IPR000228. RNA3'_term_phos_cycl-like. IPR013796. RNA3'_term_phos_cycl_insert. IPR017770. RNA3'_term_phos_cycl_sub. [Graphical view]
Gene3D	G3DSA:3.65.10.20. RNA3'_term_phos_cycl. 1 hit.
PANTHER	PTHR11096. RNA3'_term_phos_cycl. 1 hit.
Pfam	PF01137. RTC. 1 hit. PF05189. RTC_insert. 1 hit. [Graphical view]
TIGRFAMs	TIGR03399. RNA_3prim_cycl. 1 hit.
PROSITE	PS01287. RTC. 1 hit. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

RTCA_IGNH4

Accession

Primary (citable) accession number: A8A9W2

Entry history

Integrated into UniProtKB/Swiss-Prot:	March 18, 2008
Last sequence update:	October 23, 2007
Last modified:	November 3, 2009
This is version 19 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

HAMAP (High-quality Automated and Manual Annotation of microbial Proteomes)