ID CCA_LEGPA Reviewed; 410 AA.
AC Q5X1E5;
DT 16-AUG-2005, integrated into UniProtKB/Swiss-Prot.
DT 23-NOV-2004, sequence version 1.
DT 27-MAR-2024, entry version 102.
DE RecName: Full=Multifunctional CCA protein {ECO:0000255|HAMAP-Rule:MF_01261};
DE Includes:
DE RecName: Full=CCA-adding enzyme {ECO:0000255|HAMAP-Rule:MF_01261};
DE EC=2.7.7.72 {ECO:0000255|HAMAP-Rule:MF_01261};
DE AltName: Full=CCA tRNA nucleotidyltransferase {ECO:0000255|HAMAP-Rule:MF_01261};
DE AltName: Full=tRNA CCA-pyrophosphorylase {ECO:0000255|HAMAP-Rule:MF_01261};
DE AltName: Full=tRNA adenylyl-/cytidylyl-transferase {ECO:0000255|HAMAP-Rule:MF_01261};
DE AltName: Full=tRNA nucleotidyltransferase {ECO:0000255|HAMAP-Rule:MF_01261};
DE AltName: Full=tRNA-NT {ECO:0000255|HAMAP-Rule:MF_01261};
DE Includes:
DE RecName: Full=2'-nucleotidase {ECO:0000255|HAMAP-Rule:MF_01261};
DE EC=3.1.3.- {ECO:0000255|HAMAP-Rule:MF_01261};
DE Includes:
DE RecName: Full=2',3'-cyclic phosphodiesterase {ECO:0000255|HAMAP-Rule:MF_01261};
DE EC=3.1.4.- {ECO:0000255|HAMAP-Rule:MF_01261};
DE Includes:
DE RecName: Full=Phosphatase {ECO:0000255|HAMAP-Rule:MF_01261};
DE EC=3.1.3.- {ECO:0000255|HAMAP-Rule:MF_01261};
GN Name=cca {ECO:0000255|HAMAP-Rule:MF_01261}; OrderedLocusNames=lpp2798;
OS Legionella pneumophila (strain Paris).
OC Bacteria; Pseudomonadota; Gammaproteobacteria; Legionellales;
OC Legionellaceae; Legionella.
OX NCBI_TaxID=297246;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=Paris;
RX PubMed=15467720; DOI=10.1038/ng1447;
RA Cazalet C., Rusniok C., Brueggemann H., Zidane N., Magnier A., Ma L.,
RA Tichit M., Jarraud S., Bouchier C., Vandenesch F., Kunst F., Etienne J.,
RA Glaser P., Buchrieser C.;
RT "Evidence in the Legionella pneumophila genome for exploitation of host
RT cell functions and high genome plasticity.";
RL Nat. Genet. 36:1165-1173(2004).
CC -!- FUNCTION: Catalyzes the addition and repair of the essential 3'-
CC terminal CCA sequence in tRNAs without using a nucleic acid template.
CC Adds these three nucleotides in the order of C, C, and A to the tRNA
CC nucleotide-73, using CTP and ATP as substrates and producing inorganic
CC pyrophosphate. tRNA 3'-terminal CCA addition is required both for tRNA
CC processing and repair. Also involved in tRNA surveillance by mediating
CC tandem CCA addition to generate a CCACCA at the 3' terminus of unstable
CC tRNAs. While stable tRNAs receive only 3'-terminal CCA, unstable tRNAs
CC are marked with CCACCA and rapidly degraded. {ECO:0000255|HAMAP-
CC Rule:MF_01261}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=a tRNA precursor + ATP + 2 CTP = a tRNA with a 3' CCA end + 3
CC diphosphate; Xref=Rhea:RHEA:14433, Rhea:RHEA-COMP:10465, Rhea:RHEA-
CC COMP:10468, ChEBI:CHEBI:30616, ChEBI:CHEBI:33019, ChEBI:CHEBI:37563,
CC ChEBI:CHEBI:74896, ChEBI:CHEBI:83071; EC=2.7.7.72;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_01261};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=a tRNA with a 3' CCA end + ATP + 2 CTP = a tRNA with a 3'
CC CCACCA end + 3 diphosphate; Xref=Rhea:RHEA:76235, Rhea:RHEA-
CC COMP:10468, Rhea:RHEA-COMP:18655, ChEBI:CHEBI:30616,
CC ChEBI:CHEBI:33019, ChEBI:CHEBI:37563, ChEBI:CHEBI:83071,
CC ChEBI:CHEBI:195187; Evidence={ECO:0000255|HAMAP-Rule:MF_01261};
CC PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:76236;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_01261};
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_01261};
CC Note=Magnesium is required for nucleotidyltransferase activity.
CC {ECO:0000255|HAMAP-Rule:MF_01261};
CC -!- COFACTOR:
CC Name=Ni(2+); Xref=ChEBI:CHEBI:49786;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_01261};
CC Note=Nickel for phosphatase activity. {ECO:0000255|HAMAP-
CC Rule:MF_01261};
CC -!- SUBUNIT: Monomer. Can also form homodimers and oligomers.
CC {ECO:0000255|HAMAP-Rule:MF_01261}.
CC -!- DOMAIN: Comprises two domains: an N-terminal domain containing the
CC nucleotidyltransferase activity and a C-terminal HD domain associated
CC with both phosphodiesterase and phosphatase activities.
CC {ECO:0000255|HAMAP-Rule:MF_01261}.
CC -!- MISCELLANEOUS: A single active site specifically recognizes both ATP
CC and CTP and is responsible for their addition. {ECO:0000255|HAMAP-
CC Rule:MF_01261}.
CC -!- SIMILARITY: Belongs to the tRNA nucleotidyltransferase/poly(A)
CC polymerase family. Bacterial CCA-adding enzyme type 1 subfamily.
CC {ECO:0000255|HAMAP-Rule:MF_01261}.
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DR EMBL; CR628336; CAH13951.1; -; Genomic_DNA.
DR RefSeq; WP_014844821.1; NC_006368.1.
DR AlphaFoldDB; Q5X1E5; -.
DR SMR; Q5X1E5; -.
DR KEGG; lpp:lpp2798; -.
DR LegioList; lpp2798; -.
DR HOGENOM; CLU_015961_1_1_6; -.
DR GO; GO:0005524; F:ATP binding; IEA:UniProtKB-UniRule.
DR GO; GO:0004810; F:CCA tRNA nucleotidyltransferase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0004112; F:cyclic-nucleotide phosphodiesterase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0000287; F:magnesium ion binding; IEA:UniProtKB-UniRule.
DR GO; GO:0016791; F:phosphatase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0000049; F:tRNA binding; IEA:UniProtKB-UniRule.
DR GO; GO:0042245; P:RNA repair; IEA:UniProtKB-KW.
DR GO; GO:0001680; P:tRNA 3'-terminal CCA addition; IEA:UniProtKB-UniRule.
DR CDD; cd00077; HDc; 1.
DR CDD; cd05398; NT_ClassII-CCAase; 1.
DR Gene3D; 3.30.460.10; Beta Polymerase, domain 2; 1.
DR Gene3D; 1.10.3090.10; cca-adding enzyme, domain 2; 1.
DR HAMAP; MF_01261; CCA_bact_type1; 1.
DR HAMAP; MF_01262; CCA_bact_type2; 1.
DR InterPro; IPR012006; CCA_bact.
DR InterPro; IPR003607; HD/PDEase_dom.
DR InterPro; IPR006674; HD_domain.
DR InterPro; IPR043519; NT_sf.
DR InterPro; IPR002646; PolA_pol_head_dom.
DR InterPro; IPR032828; PolyA_RNA-bd.
DR PANTHER; PTHR47545; MULTIFUNCTIONAL CCA PROTEIN; 1.
DR PANTHER; PTHR47545:SF1; MULTIFUNCTIONAL CCA PROTEIN; 1.
DR Pfam; PF01966; HD; 1.
DR Pfam; PF01743; PolyA_pol; 1.
DR Pfam; PF12627; PolyA_pol_RNAbd; 1.
DR PIRSF; PIRSF000813; CCA_bact; 1.
DR SUPFAM; SSF81301; Nucleotidyltransferase; 1.
DR SUPFAM; SSF81891; Poly A polymerase C-terminal region-like; 1.
DR PROSITE; PS51831; HD; 1.
PE 3: Inferred from homology;
KW ATP-binding; Hydrolase; Magnesium; Metal-binding; Multifunctional enzyme;
KW Nickel; Nucleotide-binding; Nucleotidyltransferase; RNA repair;
KW RNA-binding; Transferase; tRNA processing.
FT CHAIN 1..410
FT /note="Multifunctional CCA protein"
FT /id="PRO_0000138981"
FT DOMAIN 228..329
FT /note="HD"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01261"
FT BINDING 8
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01261"
FT BINDING 8
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01261"
FT BINDING 11
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01261"
FT BINDING 11
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01261"
FT BINDING 21
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01261"
FT BINDING 23
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01261"
FT BINDING 91
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01261"
FT BINDING 91
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01261"
FT BINDING 137
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01261"
FT BINDING 137
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01261"
FT BINDING 140
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01261"
FT BINDING 140
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01261"
SQ SEQUENCE 410 AA; 47115 MW; B63FAE38F8DA2E40 CRC64;
MKVYLVGGAV RDRLLGIPVQ EQDWVVVGAT PEELLKRKYR QVGRDFPVFL HPETKEEYAL
ARTERKSAPG YYGFICDFSE SVTLEEDLAR RDLTINAMAM DEQGNLIDPY QGQRDLEEKL
LRHVSPAFAE DPVRVLRVAR FASRFHHLGF KIANETRLLM YSMVKQGELA HLIPERVWQE
WQKSLQEKNP EQFILSLRSC DALRVVLPEI NSLFGVPNPH QYHQEIDTGI HSLMALRASS
ELSEEPLVRF AALVHDLGKA STPIQDWPKH HGHEEEGTKL IRALCARLRI PNDYRDLAVT
VARAHLNIHR VCELRPNTIV KLLEQVDAFR RPQLFHKILI ACQADAESCG KTVVYRQTQL
WNEILSECVK VTPQTFIVQG YEGKAIKEAM HQSRVACVER IMTSWKSNEK
//
