RTCB_THAPS
ID RTCB_THAPS Reviewed; 480 AA.
AC B8LBM8;
DT 05-APR-2011, integrated into UniProtKB/Swiss-Prot.
DT 03-MAR-2009, sequence version 1.
DT 03-AUG-2022, entry version 52.
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=THAPSDRAFT_41953;
OS Thalassiosira pseudonana (Marine diatom) (Cyclotella nana).
OC Eukaryota; Sar; Stramenopiles; Ochrophyta; Bacillariophyta;
OC Coscinodiscophyceae; Thalassiosirophycidae; Thalassiosirales;
OC Thalassiosiraceae; Thalassiosira.
OX NCBI_TaxID=35128;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=CCMP1335 / NEPCC58 / CCAP 1085/12;
RX PubMed=15459382; DOI=10.1126/science.1101156;
RA Armbrust E.V., Berges J.A., Bowler C., Green B.R., Martinez D.,
RA Putnam N.H., Zhou S., Allen A.E., Apt K.E., Bechner M., Brzezinski M.A.,
RA Chaal B.K., Chiovitti A., Davis A.K., Demarest M.S., Detter J.C.,
RA Glavina T., Goodstein D., Hadi M.Z., Hellsten U., Hildebrand M.,
RA Jenkins B.D., Jurka J., Kapitonov V.V., Kroger N., Lau W.W., Lane T.W.,
RA Larimer F.W., Lippmeier J.C., Lucas S., Medina M., Montsant A., Obornik M.,
RA Parker M.S., Palenik B., Pazour G.J., Richardson P.M., Rynearson T.A.,
RA Saito M.A., Schwartz D.C., Thamatrakoln K., Valentin K., Vardi A.,
RA Wilkerson F.P., Rokhsar D.S.;
RT "The genome of the diatom Thalassiosira pseudonana: ecology, evolution, and
RT metabolism.";
RL Science 306:79-86(2004).
RN [2]
RP GENOME REANNOTATION.
RC STRAIN=CCMP1335 / NEPCC58 / CCAP 1085/12;
RG Diatom Consortium;
RA Grigoriev I., Grimwood J., Kuo A., Otillar R.P., Salamov A., Detter J.C.,
RA Schmutz J., Lindquist E., Shapiro H., Lucas S., Glavina del Rio T.,
RA Bruce D., Pitluck S., Rokhsar D., Armbrust V.;
RL Submitted (SEP-2008) 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; DS999415; EED87076.1; -; Genomic_DNA.
DR RefSeq; XP_002296380.1; XM_002296344.1.
DR AlphaFoldDB; B8LBM8; -.
DR SMR; B8LBM8; -.
DR STRING; 35128.Thaps41953; -.
DR EnsemblProtists; EED87076; EED87076; THAPSDRAFT_41953.
DR GeneID; 7443254; -.
DR KEGG; tps:THAPSDRAFT_41953; -.
DR eggNOG; KOG3833; Eukaryota.
DR InParanoid; B8LBM8; -.
DR OMA; QTRGVEC; -.
DR Proteomes; UP000001449; Unassembled WGS sequence.
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: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.
PE 3: Inferred from homology;
KW GTP-binding; Ligase; Manganese; Metal-binding; Nucleotide-binding;
KW Reference proteome; tRNA processing.
FT CHAIN 1..480
FT /note="RNA-splicing ligase RtcB homolog"
FT /id="PRO_0000407244"
FT ACT_SITE 403
FT /note="GMP-histidine intermediate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT BINDING 93
FT /ligand="Mn(2+)"
FT /ligand_id="ChEBI:CHEBI:29035"
FT /ligand_label="1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT BINDING 96
FT /ligand="Mn(2+)"
FT /ligand_id="ChEBI:CHEBI:29035"
FT /ligand_label="1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT BINDING 96
FT /ligand="Mn(2+)"
FT /ligand_id="ChEBI:CHEBI:29035"
FT /ligand_label="2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT BINDING 201..205
FT /ligand="GMP"
FT /ligand_id="ChEBI:CHEBI:58115"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT BINDING 202
FT /ligand="Mn(2+)"
FT /ligand_id="ChEBI:CHEBI:29035"
FT /ligand_label="1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT BINDING 234
FT /ligand="Mn(2+)"
FT /ligand_id="ChEBI:CHEBI:29035"
FT /ligand_label="2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT BINDING 328..329
FT /ligand="GMP"
FT /ligand_id="ChEBI:CHEBI:58115"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT BINDING 328
FT /ligand="Mn(2+)"
FT /ligand_id="ChEBI:CHEBI:29035"
FT /ligand_label="2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT BINDING 377..380
FT /ligand="GMP"
FT /ligand_id="ChEBI:CHEBI:58115"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
FT BINDING 384
FT /ligand="GMP"
FT /ligand_id="ChEBI:CHEBI:58115"
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 479
FT /ligand="GMP"
FT /ligand_id="ChEBI:CHEBI:58115"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03144"
SQ SEQUENCE 480 AA; 52066 MW; DE89E8B7C4FA6978 CRC64;
MKVPAEIFVN NDLQTLLVQE LHDTCCGSRE EADSAFIPAL RQAANVAALP GIVKASLAMP
DVHSGYGFCI GNVAAFDMDD PQAVISPGGV GFDINCGVRL IRTNLTEKDV EGSVREELAE
ALFRNIPVGV GVSGGIPCSI DDLDQLLRNG VDWAIEKGYA WEEDKDHCEE NGCMETADPN
CVSKRAKKRG LKQLGTLGAG NHYTEIQVVD EVYNTEAAKI MGIGTVGQVC IMIHTGSRGL
GHQVATDALQ VMEEAMCRDA IDLNDRQLSC ARISSKEGRE YLAAMSAAAN FAWVNRSCIT
YLARKAFSEV FQRESDDMDM HLVYDVCHNI AKVEQHIVDG EQKTLLVHRK GSTRAYPPCH
PDIPKDYQTI GQPVLIGGTM GTCSYVLVGT DKGMAETFGS TCHGAGRALS RNQSRIKLDH
NQVLNKLKED GIAIRVASPK LVTEEAPESY KNVCDVIETC QVAGISEKVV KLRPIAVIKG
