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RTCB_DICDI
ID   RTCB_DICDI              Reviewed;         508 AA.
AC   Q54Y09;
DT   08-APR-2008, integrated into UniProtKB/Swiss-Prot.
DT   24-MAY-2005, sequence version 1.
DT   03-AUG-2022, entry version 96.
DE   RecName: Full=RNA-splicing ligase RtcB homolog {ECO:0000255|HAMAP-Rule:MF_03144};
DE            EC=6.5.1.8 {ECO:0000255|HAMAP-Rule:MF_03144};
DE   AltName: Full=3'-phosphate/5'-hydroxy nucleic acid ligase {ECO:0000255|HAMAP-Rule:MF_03144};
GN   ORFNames=DDB_G0278481;
OS   Dictyostelium discoideum (Slime mold).
OC   Eukaryota; Amoebozoa; Evosea; Eumycetozoa; Dictyostelia; Dictyosteliales;
OC   Dictyosteliaceae; Dictyostelium.
OX   NCBI_TaxID=44689;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=AX4;
RX   PubMed=15875012; DOI=10.1038/nature03481;
RA   Eichinger L., Pachebat J.A., Gloeckner G., Rajandream M.A., Sucgang R.,
RA   Berriman M., Song J., Olsen R., Szafranski K., Xu Q., Tunggal B.,
RA   Kummerfeld S., Madera M., Konfortov B.A., Rivero F., Bankier A.T.,
RA   Lehmann R., Hamlin N., Davies R., Gaudet P., Fey P., Pilcher K., Chen G.,
RA   Saunders D., Sodergren E.J., Davis P., Kerhornou A., Nie X., Hall N.,
RA   Anjard C., Hemphill L., Bason N., Farbrother P., Desany B., Just E.,
RA   Morio T., Rost R., Churcher C.M., Cooper J., Haydock S., van Driessche N.,
RA   Cronin A., Goodhead I., Muzny D.M., Mourier T., Pain A., Lu M., Harper D.,
RA   Lindsay R., Hauser H., James K.D., Quiles M., Madan Babu M., Saito T.,
RA   Buchrieser C., Wardroper A., Felder M., Thangavelu M., Johnson D.,
RA   Knights A., Loulseged H., Mungall K.L., Oliver K., Price C., Quail M.A.,
RA   Urushihara H., Hernandez J., Rabbinowitsch E., Steffen D., Sanders M.,
RA   Ma J., Kohara Y., Sharp S., Simmonds M.N., Spiegler S., Tivey A.,
RA   Sugano S., White B., Walker D., Woodward J.R., Winckler T., Tanaka Y.,
RA   Shaulsky G., Schleicher M., Weinstock G.M., Rosenthal A., Cox E.C.,
RA   Chisholm R.L., Gibbs R.A., Loomis W.F., Platzer M., Kay R.R.,
RA   Williams J.G., Dear P.H., Noegel A.A., Barrell B.G., Kuspa A.;
RT   "The genome of the social amoeba Dictyostelium discoideum.";
RL   Nature 435:43-57(2005).
CC   -!- FUNCTION: Catalytic subunit of the tRNA-splicing ligase complex that
CC       acts by directly joining spliced tRNA halves to mature-sized tRNAs by
CC       incorporating the precursor-derived splice junction phosphate into the
CC       mature tRNA as a canonical 3',5'-phosphodiester. May act as an RNA
CC       ligase with broad substrate specificity, and may function toward other
CC       RNAs. {ECO:0000255|HAMAP-Rule:MF_03144}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=a 3'-end 3'-phospho-ribonucleotide-RNA + a 5'-end dephospho-
CC         ribonucleoside-RNA + GTP = a ribonucleotidyl-ribonucleotide-RNA +
CC         diphosphate + GMP; Xref=Rhea:RHEA:68076, Rhea:RHEA-COMP:10463,
CC         Rhea:RHEA-COMP:13936, Rhea:RHEA-COMP:17355, ChEBI:CHEBI:33019,
CC         ChEBI:CHEBI:37565, ChEBI:CHEBI:58115, ChEBI:CHEBI:83062,
CC         ChEBI:CHEBI:138284, ChEBI:CHEBI:173118; EC=6.5.1.8;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_03144};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=a 3'-end 2',3'-cyclophospho-ribonucleotide-RNA + a 5'-end
CC         dephospho-ribonucleoside-RNA + GTP + H2O = a ribonucleotidyl-
CC         ribonucleotide-RNA + diphosphate + GMP + H(+); Xref=Rhea:RHEA:68080,
CC         Rhea:RHEA-COMP:10464, Rhea:RHEA-COMP:13936, Rhea:RHEA-COMP:17355,
CC         ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:33019,
CC         ChEBI:CHEBI:37565, ChEBI:CHEBI:58115, ChEBI:CHEBI:83064,
CC         ChEBI:CHEBI:138284, ChEBI:CHEBI:173118; EC=6.5.1.8;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_03144};
CC   -!- COFACTOR:
CC       Name=Mn(2+); Xref=ChEBI:CHEBI:29035;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_03144};
CC       Note=Binds 2 manganese ions per subunit. {ECO:0000255|HAMAP-
CC       Rule:MF_03144};
CC   -!- SUBUNIT: Catalytic component of the tRNA-splicing ligase complex.
CC       {ECO:0000255|HAMAP-Rule:MF_03144}.
CC   -!- MISCELLANEOUS: Ligation probably proceeds through 3 nucleotidyl
CC       transfer steps, with 2',3'-cyclic phosphate termini being hydrolyzed to
CC       3'-P termini in a step that precedes 3'-P activation with GMP. In the
CC       first nucleotidyl transfer step, RTCB reacts with GTP to form a
CC       covalent RTCB-histidine-GMP intermediate with release of PPi; in the
CC       second step, the GMP moiety is transferred to the RNA 3'-P; in the
CC       third step, the 5'-OH from the opposite RNA strand attacks the
CC       activated 3'-P to form a 3',5'-phosphodiester bond and release GMP.
CC       {ECO:0000255|HAMAP-Rule:MF_03144}.
CC   -!- SIMILARITY: Belongs to the RtcB family. {ECO:0000255|HAMAP-
CC       Rule:MF_03144}.
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DR   EMBL; AAFI02000023; EAL68413.1; -; Genomic_DNA.
DR   RefSeq; XP_642393.1; XM_637301.1.
DR   AlphaFoldDB; Q54Y09; -.
DR   SMR; Q54Y09; -.
DR   STRING; 44689.DDB0234075; -.
DR   PaxDb; Q54Y09; -.
DR   EnsemblProtists; EAL68413; EAL68413; DDB_G0278481.
DR   GeneID; 8621598; -.
DR   KEGG; ddi:DDB_G0278481; -.
DR   dictyBase; DDB_G0278481; iliN.
DR   eggNOG; KOG3833; Eukaryota.
DR   HOGENOM; CLU_022279_0_0_1; -.
DR   InParanoid; Q54Y09; -.
DR   OMA; QTRGVEC; -.
DR   PhylomeDB; Q54Y09; -.
DR   PRO; PR:Q54Y09; -.
DR   Proteomes; UP000002195; Chromosome 3.
DR   GO; GO:0005634; C:nucleus; IBA:GO_Central.
DR   GO; GO:0072669; C:tRNA-splicing ligase complex; IBA:GO_Central.
DR   GO; GO:0005525; F:GTP binding; IEA:UniProtKB-KW.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0003972; F:RNA ligase (ATP) activity; IBA:GO_Central.
DR   GO; GO:0009617; P:response to bacterium; HEP:dictyBase.
DR   GO; GO:0000971; P:tRNA exon ligation utilizing 2',3' cyclic phosphate of 5'-exon as source of linkage phosphate; IBA:GO_Central.
DR   Gene3D; 3.90.1860.10; -; 1.
DR   HAMAP; MF_03144; RtcB_euk; 1.
DR   InterPro; IPR001233; RtcB.
DR   InterPro; IPR036025; RtcB-like_sf.
DR   InterPro; IPR027513; RtcB_euk.
DR   PANTHER; PTHR11118; PTHR11118; 1.
DR   Pfam; PF01139; RtcB; 1.
DR   SUPFAM; SSF103365; SSF103365; 1.
DR   PROSITE; PS01288; UPF0027; 1.
PE   3: Inferred from homology;
KW   GTP-binding; Ligase; Manganese; Metal-binding; Nucleotide-binding;
KW   Reference proteome; tRNA processing.
FT   CHAIN           1..508
FT                   /note="RNA-splicing ligase RtcB homolog"
FT                   /id="PRO_0000328511"
FT   ACT_SITE        431
FT                   /note="GMP-histidine intermediate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT   BINDING         122
FT                   /ligand="Mn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29035"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT   BINDING         125
FT                   /ligand="Mn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29035"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT   BINDING         125
FT                   /ligand="Mn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29035"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT   BINDING         229..233
FT                   /ligand="GMP"
FT                   /ligand_id="ChEBI:CHEBI:58115"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT   BINDING         230
FT                   /ligand="Mn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29035"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT   BINDING         262
FT                   /ligand="Mn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29035"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT   BINDING         356..357
FT                   /ligand="GMP"
FT                   /ligand_id="ChEBI:CHEBI:58115"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT   BINDING         356
FT                   /ligand="Mn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29035"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT   BINDING         405..408
FT                   /ligand="GMP"
FT                   /ligand_id="ChEBI:CHEBI:58115"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT   BINDING         412
FT                   /ligand="GMP"
FT                   /ligand_id="ChEBI:CHEBI:58115"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT   BINDING         431..434
FT                   /ligand="GMP"
FT                   /ligand_id="ChEBI:CHEBI:58115"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT   BINDING         507
FT                   /ligand="GMP"
FT                   /ligand_id="ChEBI:CHEBI:58115"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
SQ   SEQUENCE   508 AA;  55712 MW;  5233CEDA26EC5B4C CRC64;
     MTDSVVRGFE DELSFIEKID SVRYRVKKGF VPNMNVDGMI YVNDSIKDYL YEELEQYSKR
     GVSGFLPAVK QIANVASLPG IVGHSLGMPD IHSGYGFSIG NVAAFDTEDP LSIVSPGGVG
     FDINCGVRLL RTNLTEKDIE PIKEQLCQSL FDHVPVGVGS KGVIPMNIKT LNQALEMGVD
     WSLGEGYAWV EDKEHCEEYG RMLNADPTKV SERAKKRGLP QLGTLGAGNH YLEVQVVDEI
     YDKAAANKMG IDRQGQICIM IHSGSRGLGH QVATDSLTLM EKAMARDHIH LNDKQLACSR
     INSTEGQDYL SGMAAAANFA WVNRQSMTFL TRQAFAKAFN STPDDLDMHV IYDVSHNIAK
     FEEHNVNGRP KKLLVHRKGA TRAFAPHHPL IPVDYQFTGQ PVLIGGTMGT CSYVLTGTEL
     GMNETFGSTC HGAGRSCSRN KSRNNLSYTD VLDSLQAKGI SIRVASPKLV MEEAPESYKD
     VVQVIETCHK AGISKKSVKL RPIAVIKG
 
 
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