ID A0A1H7G6U2_9PROT Unreviewed; 414 AA.
AC A0A1H7G6U2;
DT 22-NOV-2017, integrated into UniProtKB/TrEMBL.
DT 22-NOV-2017, sequence version 1.
DT 27-MAR-2024, entry version 35.
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=SAMN05216387_101191 {ECO:0000313|EMBL:SEK33784.1};
OS Nitrosovibrio tenuis.
OC Bacteria; Pseudomonadota; Betaproteobacteria; Nitrosomonadales;
OC Nitrosomonadaceae; Nitrosovibrio.
OX NCBI_TaxID=1233 {ECO:0000313|EMBL:SEK33784.1, ECO:0000313|Proteomes:UP000198620};
RN [1] {ECO:0000313|EMBL:SEK33784.1, ECO:0000313|Proteomes:UP000198620}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=Nv1 {ECO:0000313|EMBL:SEK33784.1,
RC ECO:0000313|Proteomes:UP000198620};
RA de Groot N.N.;
RL Submitted (OCT-2016) to the EMBL/GenBank/DDBJ databases.
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}.
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DR EMBL; FOBH01000001; SEK33784.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A1H7G6U2; -.
DR STRING; 1233.SAMN05216387_101191; -.
DR OrthoDB; 9805698at2; -.
DR Proteomes; UP000198620; 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 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, ECO:0000313|EMBL:SEK33784.1};
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:UP000198620};
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 225..326
FT /note="HD"
FT /evidence="ECO:0000259|PROSITE:PS51831"
FT BINDING 8
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01261"
FT BINDING 8
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01261"
FT BINDING 11
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01261"
FT BINDING 11
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01261"
FT BINDING 21
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01261"
FT BINDING 23
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01261"
FT BINDING 91
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01261"
FT BINDING 91
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01261"
FT BINDING 137
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01261"
FT BINDING 137
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01261"
FT BINDING 140
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01261"
FT BINDING 140
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01261"
SQ SEQUENCE 414 AA; 46432 MW; CC8CA84DA1630BD1 CRC64;
MKTYLVGGSV RDEILGLPVT DHDYVVVGAS PDEMVRLGYR PVGKDFPVFL HPQSQEQYAL
ARTERKVSRG YKGFEIYTSP EVTLREDLAR RDLTINALAK DQDGNIIDPF GGIADLEAGV
LRHISPAFTE DPVRVLRTAR FAARFGFHVA PETLALMNEM VHNGEVDALV PERVWQEFAR
GLMEKKPSRM FYALRECNAL IRIFPEVDSL FGVPQPIQHH PEIDTGVHVM MVIDHAASKN
YSLPVRFASL THDLGKGTTP PEEWPRHIGH EARGMRLVQD LCERIRSPNE VRDLALLVAR
YHGEVHRALE LRPATIASML QAVDAYRKPE RFEEFLQACS CDFHGRPGYA ERPYPQAERL
RGALAAARTV DAGAIAAELA KIISDPSRLP AEINAKVSEL RIAEIRNRLS SLPQ
//
