RTCB2_CULQU
ID RTCB2_CULQU Reviewed; 502 AA.
AC B0XKF3;
DT 05-APR-2011, integrated into UniProtKB/Swiss-Prot.
DT 08-APR-2008, sequence version 1.
DT 03-AUG-2022, entry version 70.
DE RecName: Full=RNA-splicing ligase RtcB homolog 2 {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 2 {ECO:0000255|HAMAP-Rule:MF_03144};
GN ORFNames=CPIJ019543;
OS Culex quinquefasciatus (Southern house mosquito) (Culex pungens).
OC Eukaryota; Metazoa; Ecdysozoa; Arthropoda; Hexapoda; Insecta; Pterygota;
OC Neoptera; Endopterygota; Diptera; Nematocera; Culicoidea; Culicidae;
OC Culicinae; Culicini; Culex; Culex.
OX NCBI_TaxID=7176;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=JHB;
RG The Broad Institute Genome Sequencing Platform;
RA Atkinson P.W., Hemingway J., Christensen B.M., Higgs S., Kodira C.D.,
RA Hannick L.I., Megy K., O'Leary S.B., Pearson M., Haas B.J., Mauceli E.,
RA Wortman J.R., Lee N.H., Guigo R., Stanke M., Alvarado L., Amedeo P.,
RA Antoine C.H., Arensburger P., Bidwell S.L., Crawford M., Camaro F.,
RA Devon K., Engels R., Hammond M., Howarth C., Koehrsen M., Lawson D.,
RA Montgomery P., Nene V., Nusbaum C., Puiu D., Romero-Severson J.,
RA Severson D.W., Shumway M., Sisk P., Stolte C., Zeng Q., Eisenstadt E.,
RA Fraser-Liggett C.M., Strausberg R., Galagan J., Birren B., Collins F.H.;
RT "Annotation of Culex pipiens quinquefasciatus.";
RL Submitted (MAR-2007) to the EMBL/GenBank/DDBJ databases.
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; DS233815; EDS31844.1; -; Genomic_DNA.
DR RefSeq; XP_001870125.1; XM_001870090.1.
DR AlphaFoldDB; B0XKF3; -.
DR SMR; B0XKF3; -.
DR STRING; 7176.CPIJ019543-PA; -.
DR KEGG; cqu:CpipJ_CPIJ019543; -.
DR VEuPathDB; VectorBase:CPIJ019543; -.
DR VEuPathDB; VectorBase:CQUJHB017199; -.
DR eggNOG; KOG3833; Eukaryota.
DR HOGENOM; CLU_022279_0_0_1; -.
DR InParanoid; B0XKF3; -.
DR OMA; PGSMGDY; -.
DR OrthoDB; 394775at2759; -.
DR PhylomeDB; B0XKF3; -.
DR Proteomes; UP000002320; Partially assembled WGS sequence.
DR GO; GO:0072669; C:tRNA-splicing ligase complex; IEA:UniProtKB-UniRule.
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; IEA:InterPro.
DR GO; GO:0006388; P:tRNA splicing, via endonucleolytic cleavage and ligation; IEA:UniProtKB-UniRule.
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..502
FT /note="RNA-splicing ligase RtcB homolog 2"
FT /id="PRO_0000407225"
FT ACT_SITE 429
FT /note="GMP-histidine intermediate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT BINDING 120
FT /ligand="Mn(2+)"
FT /ligand_id="ChEBI:CHEBI:29035"
FT /ligand_label="1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT BINDING 123
FT /ligand="Mn(2+)"
FT /ligand_id="ChEBI:CHEBI:29035"
FT /ligand_label="1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT BINDING 123
FT /ligand="Mn(2+)"
FT /ligand_id="ChEBI:CHEBI:29035"
FT /ligand_label="2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT BINDING 227..231
FT /ligand="GMP"
FT /ligand_id="ChEBI:CHEBI:58115"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT BINDING 228
FT /ligand="Mn(2+)"
FT /ligand_id="ChEBI:CHEBI:29035"
FT /ligand_label="1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT BINDING 260
FT /ligand="Mn(2+)"
FT /ligand_id="ChEBI:CHEBI:29035"
FT /ligand_label="2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT BINDING 354..355
FT /ligand="GMP"
FT /ligand_id="ChEBI:CHEBI:58115"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT BINDING 354
FT /ligand="Mn(2+)"
FT /ligand_id="ChEBI:CHEBI:29035"
FT /ligand_label="2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT BINDING 403..406
FT /ligand="GMP"
FT /ligand_id="ChEBI:CHEBI:58115"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT BINDING 410
FT /ligand="GMP"
FT /ligand_id="ChEBI:CHEBI:58115"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT BINDING 429..432
FT /ligand="GMP"
FT /ligand_id="ChEBI:CHEBI:58115"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
SQ SEQUENCE 502 AA; 55946 MW; 81FD1F4A86AECBA5 CRC64;
MVVRDYNTEL TYIERISTNS FRIKKGFQPN MNVEGIFYAN SRLEKLMFDE LRNSCRPGMT
GGFLPGVKQI ANVAALPGIV GRSVGLPDIH SGYGFAIGNM AAFDMSDPTS IVSPGGVGFD
INCGVRLLRT NLFEKDVKPV QEQLAQSLFD HIPVGVGSKG IIPMNAHDLE EALEMGMDWS
LREGYVWAED KEHCEEYGRM LTADPSKVSM RAKKRGLPQL GTLGAGNHYA EIQVVEEIYD
KYAASKMGIE ELGQICVMIH SGSRGFGHQV ATDALVEMEK AMKRDKIETN DRQLACARIN
SVEGQNYLKA MSAAANFAWV NRSSMTFLTR QAFAKQFNTT PDDLDMHVIY DVSHNVAKIE
EHIVDGRPKQ LLVHRKGSTR AFPPHHPLIP VDYQLTGQPV LVGGSMGTCS FVLTGTEKGM
AETFGSTCHG AGRSLSRAKS RRNLDYRTSC GIWRRREFPS GWRRRSWSRR KHPIRTRTCV
MWCRPVTTWA SVPSASSCGR LR
