ID A0A1A6C531_9GAMM Unreviewed; 416 AA.
AC A0A1A6C531;
DT 05-OCT-2016, integrated into UniProtKB/TrEMBL.
DT 05-OCT-2016, sequence version 1.
DT 27-MAR-2024, entry version 44.
DE RecName: Full=Multifunctional CCA protein {ECO:0000256|HAMAP-Rule:MF_01261};
DE Includes:
DE RecName: Full=CCA-adding enzyme {ECO:0000256|HAMAP-Rule:MF_01261};
DE EC=2.7.7.72 {ECO:0000256|HAMAP-Rule:MF_01261};
DE AltName: Full=CCA tRNA nucleotidyltransferase {ECO:0000256|HAMAP-Rule:MF_01261};
DE AltName: Full=tRNA CCA-pyrophosphorylase {ECO:0000256|HAMAP-Rule:MF_01261};
DE AltName: Full=tRNA adenylyl-/cytidylyl-transferase {ECO:0000256|HAMAP-Rule:MF_01261};
DE AltName: Full=tRNA nucleotidyltransferase {ECO:0000256|HAMAP-Rule:MF_01261};
DE AltName: Full=tRNA-NT {ECO:0000256|HAMAP-Rule:MF_01261};
DE Includes:
DE RecName: Full=2'-nucleotidase {ECO:0000256|HAMAP-Rule:MF_01261};
DE EC=3.1.3.- {ECO:0000256|HAMAP-Rule:MF_01261};
DE Includes:
DE RecName: Full=2',3'-cyclic phosphodiesterase {ECO:0000256|HAMAP-Rule:MF_01261};
DE EC=3.1.4.- {ECO:0000256|HAMAP-Rule:MF_01261};
DE Includes:
DE RecName: Full=Phosphatase {ECO:0000256|HAMAP-Rule:MF_01261};
GN Name=cca {ECO:0000256|HAMAP-Rule:MF_01261};
GN ORFNames=Thpro_021996 {ECO:0000313|EMBL:OBS09668.1};
OS Acidihalobacter prosperus.
OC Bacteria; Pseudomonadota; Gammaproteobacteria; Chromatiales;
OC Ectothiorhodospiraceae; Acidihalobacter.
OX NCBI_TaxID=160660 {ECO:0000313|EMBL:OBS09668.1, ECO:0000313|Proteomes:UP000029273};
RN [1] {ECO:0000313|EMBL:OBS09668.1, ECO:0000313|Proteomes:UP000029273}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 5130 {ECO:0000313|EMBL:OBS09668.1,
RC ECO:0000313|Proteomes:UP000029273};
RX PubMed=25342676;
RA Ossandon F.J., Cardenas J.P., Corbett M., Quatrini R., Holmes D.S.,
RA Watkin E.;
RT "Draft Genome Sequence of the Iron-Oxidizing, Acidophilic, and Halotolerant
RT 'Thiobacillus prosperus' Type Strain DSM 5130.";
RL Genome Announc. 2:0-0(2014).
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:0000256|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:0000256|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:0000256|HAMAP-Rule:MF_01261};
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_01261};
CC Note=Magnesium is required for nucleotidyltransferase activity.
CC {ECO:0000256|HAMAP-Rule:MF_01261};
CC -!- COFACTOR:
CC Name=Ni(2+); Xref=ChEBI:CHEBI:49786;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_01261};
CC Note=Nickel for phosphatase activity. {ECO:0000256|HAMAP-
CC Rule:MF_01261};
CC -!- SUBUNIT: Monomer. Can also form homodimers and oligomers.
CC {ECO:0000256|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:0000256|HAMAP-Rule:MF_01261}.
CC -!- MISCELLANEOUS: A single active site specifically recognizes both ATP
CC and CTP and is responsible for their addition. {ECO:0000256|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:0000256|HAMAP-Rule:MF_01261}.
CC -!- CAUTION: The sequence shown here is derived from an EMBL/GenBank/DDBJ
CC whole genome shotgun (WGS) entry which is preliminary data.
CC {ECO:0000313|EMBL:OBS09668.1}.
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DR EMBL; JQSG02000003; OBS09668.1; -; Genomic_DNA.
DR RefSeq; WP_065089571.1; NZ_JQSG02000003.1.
DR AlphaFoldDB; A0A1A6C531; -.
DR STRING; 160660.BJI67_02820; -.
DR OrthoDB; 9805698at2; -.
DR Proteomes; UP000029273; Unassembled WGS sequence.
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 SMART; SM00471; HDc; 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 {ECO:0000256|HAMAP-Rule:MF_01261};
KW Hydrolase {ECO:0000256|HAMAP-Rule:MF_01261};
KW Magnesium {ECO:0000256|ARBA:ARBA00022842, ECO:0000256|HAMAP-Rule:MF_01261};
KW Metal-binding {ECO:0000256|ARBA:ARBA00022723, ECO:0000256|HAMAP-
KW Rule:MF_01261}; Multifunctional enzyme {ECO:0000256|HAMAP-Rule:MF_01261};
KW Nickel {ECO:0000256|ARBA:ARBA00022596, ECO:0000256|HAMAP-Rule:MF_01261};
KW Nucleotide-binding {ECO:0000256|ARBA:ARBA00022741, ECO:0000256|HAMAP-
KW Rule:MF_01261};
KW Nucleotidyltransferase {ECO:0000256|ARBA:ARBA00022695, ECO:0000256|HAMAP-
KW Rule:MF_01261}; Reference proteome {ECO:0000313|Proteomes:UP000029273};
KW RNA repair {ECO:0000256|ARBA:ARBA00022800, ECO:0000256|HAMAP-
KW Rule:MF_01261};
KW RNA-binding {ECO:0000256|ARBA:ARBA00022884, ECO:0000256|HAMAP-
KW Rule:MF_01261};
KW Transferase {ECO:0000256|ARBA:ARBA00022679, ECO:0000256|HAMAP-
KW Rule:MF_01261};
KW tRNA processing {ECO:0000256|ARBA:ARBA00022694, ECO:0000256|HAMAP-
KW Rule:MF_01261}.
FT DOMAIN 235..336
FT /note="HD"
FT /evidence="ECO:0000259|PROSITE:PS51831"
FT BINDING 15
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01261"
FT BINDING 15
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01261"
FT BINDING 18
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01261"
FT BINDING 18
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01261"
FT BINDING 28
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01261"
FT BINDING 30
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01261"
FT BINDING 98
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01261"
FT BINDING 98
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01261"
FT BINDING 144
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01261"
FT BINDING 144
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01261"
FT BINDING 147
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01261"
FT BINDING 147
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01261"
SQ SEQUENCE 416 AA; 46043 MW; 8EAFCDACACF9828C CRC64;
MATPTTPSAT FLVGGAVRDR LLGLPVRERD WVVVGSTAEE MRRLGFKQVG KDFPVFLHPR
TGEEYALART ERKTAAGYYG FAVHASPDVT LEEDLQRRDL TINAMAEADD GRLIDPYGGR
QDLEKRLLRH VSPAFVEDPV RILRVARFAA RLAPQGFVIA EATLALMREM VAAGEVDALV
PERVWQELAR ALAAPAPEAF FETLRDCGAL ARLMPELDRL WGVPQPPQWH PEIDTGLHTL
LVLQQAARLS PEPTVRFAAL LHDLGKGTTP PAQWPKHHGH EQRGERLVLD VCARFRAPNE
FRDLARLVAR EHGNAHRALA LRPDTVLKLL EGSDAFRRPE RFEQFLLACE ADARGRPGFE
SRPYPQADFL RAALAAARAV PVQPLVAQGH KGPQLAEHLH GARADAIAAL PRPAID
//
