ID   RTCA_PSEA8              Reviewed;         341 AA.
AC   B7V0C8;
DT   14-APR-2009, integrated into UniProtKB/Swiss-Prot.
DT   10-FEB-2009, sequence version 1.
DT   03-AUG-2022, entry version 72.
DE   RecName: Full=RNA 3'-terminal phosphate cyclase {ECO:0000255|HAMAP-Rule:MF_00200};
DE            Short=RNA cyclase {ECO:0000255|HAMAP-Rule:MF_00200};
DE            Short=RNA-3'-phosphate cyclase {ECO:0000255|HAMAP-Rule:MF_00200};
DE            EC=6.5.1.4 {ECO:0000255|HAMAP-Rule:MF_00200};
GN   Name=rtcA {ECO:0000255|HAMAP-Rule:MF_00200}; OrderedLocusNames=PLES_49681;
OS   Pseudomonas aeruginosa (strain LESB58).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Pseudomonadales;
OC   Pseudomonadaceae; Pseudomonas.
OX   NCBI_TaxID=557722;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=LESB58;
RX   PubMed=19047519; DOI=10.1101/gr.086082.108;
RA   Winstanley C., Langille M.G.I., Fothergill J.L., Kukavica-Ibrulj I.,
RA   Paradis-Bleau C., Sanschagrin F., Thomson N.R., Winsor G.L., Quail M.A.,
RA   Lennard N., Bignell A., Clarke L., Seeger K., Saunders D., Harris D.,
RA   Parkhill J., Hancock R.E.W., Brinkman F.S.L., Levesque R.C.;
RT   "Newly introduced genomic prophage islands are critical determinants of in
RT   vivo competitiveness in the Liverpool epidemic strain of Pseudomonas
RT   aeruginosa.";
RL   Genome Res. 19:12-23(2009).
CC   -!- FUNCTION: Catalyzes the conversion of 3'-phosphate to a 2',3'-cyclic
CC       phosphodiester at the end of RNA. The mechanism of action of the enzyme
CC       occurs in 3 steps: (A) adenylation of the enzyme by ATP; (B) transfer
CC       of adenylate to an RNA-N3'P to produce RNA-N3'PP5'A; (C) and attack of
CC       the adjacent 2'-hydroxyl on the 3'-phosphorus in the diester linkage to
CC       produce the cyclic end product. The biological role of this enzyme is
CC       unknown but it is likely to function in some aspects of cellular RNA
CC       processing. {ECO:0000255|HAMAP-Rule:MF_00200}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=a 3'-end 3'-phospho-ribonucleotide-RNA + ATP = a 3'-end 2',3'-
CC         cyclophospho-ribonucleotide-RNA + AMP + diphosphate;
CC         Xref=Rhea:RHEA:23976, Rhea:RHEA-COMP:10463, Rhea:RHEA-COMP:10464,
CC         ChEBI:CHEBI:30616, ChEBI:CHEBI:33019, ChEBI:CHEBI:83062,
CC         ChEBI:CHEBI:83064, ChEBI:CHEBI:456215; EC=6.5.1.4;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00200};
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00200}.
CC   -!- SIMILARITY: Belongs to the RNA 3'-terminal cyclase family. Type 1
CC       subfamily. {ECO:0000255|HAMAP-Rule:MF_00200}.
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DR   EMBL; FM209186; CAW29722.1; -; Genomic_DNA.
DR   RefSeq; WP_012614552.1; NC_011770.1.
DR   AlphaFoldDB; B7V0C8; -.
DR   SMR; B7V0C8; -.
DR   KEGG; pag:PLES_49681; -.
DR   HOGENOM; CLU_027882_0_0_6; -.
DR   OMA; PKPGLSH; -.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-KW.
DR   GO; GO:0003963; F:RNA-3'-phosphate cyclase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0006396; P:RNA processing; IEA:InterPro.
DR   Gene3D; 3.30.360.20; -; 1.
DR   Gene3D; 3.65.10.20; -; 1.
DR   HAMAP; MF_00200; RTC; 1.
DR   InterPro; IPR013791; RNA3'-term_phos_cycl_insert.
DR   InterPro; IPR023797; RNA3'_phos_cyclase_dom.
DR   InterPro; IPR037136; RNA3'_phos_cyclase_dom_sf.
DR   InterPro; IPR000228; RNA3'_term_phos_cyc.
DR   InterPro; IPR017770; RNA3'_term_phos_cyc_type_1.
DR   InterPro; IPR020719; RNA3'_term_phos_cycl-like_CS.
DR   InterPro; IPR013792; RNA3'P_cycl/enolpyr_Trfase_a/b.
DR   InterPro; IPR036553; RPTC_insert.
DR   PANTHER; PTHR11096; PTHR11096; 1.
DR   PANTHER; PTHR11096:SF0; PTHR11096:SF0; 1.
DR   Pfam; PF01137; RTC; 1.
DR   Pfam; PF05189; RTC_insert; 1.
DR   PIRSF; PIRSF005378; RNA3'_term_phos_cycl_euk; 1.
DR   SUPFAM; SSF52913; SSF52913; 1.
DR   SUPFAM; SSF55205; SSF55205; 2.
DR   TIGRFAMs; TIGR03399; RNA_3prim_cycl; 1.
DR   PROSITE; PS01287; RTC; 1.
PE   3: Inferred from homology;
KW   ATP-binding; Cytoplasm; Ligase; Nucleotide-binding.
FT   CHAIN           1..341
FT                   /note="RNA 3'-terminal phosphate cyclase"
FT                   /id="PRO_1000118706"
FT   ACT_SITE        308
FT                   /note="Tele-AMP-histidine intermediate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00200"
FT   BINDING         102
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00200"
FT   BINDING         283..287
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00200"
SQ   SEQUENCE   341 AA;  36621 MW;  7AD89E130981CDB0 CRC64;
     MRKDLIELDG SEGGGQILRS ALSLSMTSGQ PLRIRNIRGR RSRPGLLRQH LTAVRAAAEI
     CAAEVEGAEL GSRELAFRPG AIRAGDYAFA IGSAGSCSLV LQTLLPALLA ANGESRVRIS
     GGTHNPLAPP ADFLRDSWLP LLQRMGAEVD LELLRHGFVP AGGGELLARV RPARWRPLQL
     EHPGAALRRQ ARALLAGIPG HVGERELERV RQRLGWSDEE RQLEFLAEVQ GPGNALLLRI
     DCEHICATFC AFGQAGVSAE RVAEQVATQA IGWMESGCAA DEHLADQLLL PMALAGAGSF
     TTPRLSAHLQ SNRRVIERFL PVRIGDQALD GGGHRIVITS A