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RTCA_METTH
ID   RTCA_METTH              Reviewed;         337 AA.
AC   O27937;
DT   15-DEC-1998, integrated into UniProtKB/Swiss-Prot.
DT   01-JAN-1998, sequence version 1.
DT   03-AUG-2022, entry version 123.
DE   RecName: Full=RNA 3'-terminal phosphate cyclase;
DE            Short=RNA cyclase;
DE            Short=RNA-3'-phosphate cyclase;
DE            EC=6.5.1.4;
GN   Name=rtcA; OrderedLocusNames=MTH_1915;
OS   Methanothermobacter thermautotrophicus (strain ATCC 29096 / DSM 1053 / JCM
OS   10044 / NBRC 100330 / Delta H) (Methanobacterium thermoautotrophicum).
OC   Archaea; Euryarchaeota; Methanomada group; Methanobacteria;
OC   Methanobacteriales; Methanobacteriaceae; Methanothermobacter.
OX   NCBI_TaxID=187420;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 29096 / DSM 1053 / JCM 10044 / NBRC 100330 / Delta H;
RX   PubMed=9371463; DOI=10.1128/jb.179.22.7135-7155.1997;
RA   Smith D.R., Doucette-Stamm L.A., Deloughery C., Lee H.-M., Dubois J.,
RA   Aldredge T., Bashirzadeh R., Blakely D., Cook R., Gilbert K., Harrison D.,
RA   Hoang L., Keagle P., Lumm W., Pothier B., Qiu D., Spadafora R., Vicare R.,
RA   Wang Y., Wierzbowski J., Gibson R., Jiwani N., Caruso A., Bush D.,
RA   Safer H., Patwell D., Prabhakar S., McDougall S., Shimer G., Goyal A.,
RA   Pietrovski S., Church G.M., Daniels C.J., Mao J.-I., Rice P., Noelling J.,
RA   Reeve J.N.;
RT   "Complete genome sequence of Methanobacterium thermoautotrophicum deltaH:
RT   functional analysis and comparative genomics.";
RL   J. Bacteriol. 179:7135-7155(1997).
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 (By similarity). {ECO:0000250}.
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   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000305}.
CC   -!- SIMILARITY: Belongs to the RNA 3'-terminal cyclase family. Type 1
CC       subfamily. {ECO:0000305}.
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DR   EMBL; AE000666; AAB86375.1; -; Genomic_DNA.
DR   PIR; G69122; G69122.
DR   RefSeq; WP_010877511.1; NC_000916.1.
DR   AlphaFoldDB; O27937; -.
DR   SMR; O27937; -.
DR   STRING; 187420.MTH_1915; -.
DR   EnsemblBacteria; AAB86375; AAB86375; MTH_1915.
DR   GeneID; 1471000; -.
DR   KEGG; mth:MTH_1915; -.
DR   PATRIC; fig|187420.15.peg.1871; -.
DR   HOGENOM; CLU_027882_0_0_2; -.
DR   OMA; PKPGLSH; -.
DR   Proteomes; UP000005223; Chromosome.
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; 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; Reference proteome.
FT   CHAIN           1..337
FT                   /note="RNA 3'-terminal phosphate cyclase"
FT                   /id="PRO_0000156429"
FT   ACT_SITE        306
FT                   /note="Tele-AMP-histidine intermediate"
FT                   /evidence="ECO:0000250"
FT   BINDING         100
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000250"
FT   BINDING         281..285
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   337 AA;  35932 MW;  0D893466978743FD CRC64;
     MIVIDGSEGE GGGAVVRVST ALAAVTSRSV RVYNIRARRS RSGLSHQHLT AVRAVARISN
     GTLRGDELGS MELEFSPGRV TGGTFNFDVK TAGSTGLVLQ AIMVAAAASE GEIDVTVSGG
     TDVLWAPTCD YLREVTIPVL EMMGYSARIE IIRRGYYPEG GGRVHAIIEP SELRPITLEE
     SEIHAVRGIS HSRNLPVHVA ERQAESAMKI LRGAGLDVDI MVEDASGPVG RGSGITLWAE
     GNTRLGAVSL GKPGKRAEKV GSEAARELLG FIESGSPLDR YMGDQIIPYM ALTGDSRVRT
     CELTLHAETN IILSEKITGR RFRVEGERGG PATIEVL
 
 
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