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CCA_BUCBP
ID   CCA_BUCBP               Reviewed;         419 AA.
AC   Q89B06;
DT   14-NOV-2003, integrated into UniProtKB/Swiss-Prot.
DT   01-JUN-2003, sequence version 1.
DT   03-AUG-2022, entry version 96.
DE   RecName: Full=CCA-adding enzyme {ECO:0000255|HAMAP-Rule:MF_01262};
DE            EC=2.7.7.72 {ECO:0000255|HAMAP-Rule:MF_01262};
DE   AltName: Full=CCA tRNA nucleotidyltransferase {ECO:0000255|HAMAP-Rule:MF_01262};
DE   AltName: Full=tRNA CCA-pyrophosphorylase {ECO:0000255|HAMAP-Rule:MF_01262};
DE   AltName: Full=tRNA adenylyl-/cytidylyl- transferase {ECO:0000255|HAMAP-Rule:MF_01262};
DE   AltName: Full=tRNA nucleotidyltransferase {ECO:0000255|HAMAP-Rule:MF_01262};
DE   AltName: Full=tRNA-NT {ECO:0000255|HAMAP-Rule:MF_01262};
GN   Name=cca {ECO:0000255|HAMAP-Rule:MF_01262}; OrderedLocusNames=bbp_057;
OS   Buchnera aphidicola subsp. Baizongia pistaciae (strain Bp).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC   Erwiniaceae; Buchnera.
OX   NCBI_TaxID=224915;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Bp;
RX   PubMed=12522265; DOI=10.1073/pnas.0235981100;
RA   van Ham R.C.H.J., Kamerbeek J., Palacios C., Rausell C., Abascal F.,
RA   Bastolla U., Fernandez J.M., Jimenez L., Postigo M., Silva F.J.,
RA   Tamames J., Viguera E., Latorre A., Valencia A., Moran F., Moya A.;
RT   "Reductive genome evolution in Buchnera aphidicola.";
RL   Proc. Natl. Acad. Sci. U.S.A. 100:581-586(2003).
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. {ECO:0000255|HAMAP-Rule:MF_01262}.
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_01262};
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01262};
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_01262}.
CC   -!- SIMILARITY: Belongs to the tRNA nucleotidyltransferase/poly(A)
CC       polymerase family. Bacterial CCA-adding enzyme type 2 subfamily.
CC       {ECO:0000255|HAMAP-Rule:MF_01262}.
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DR   EMBL; AE016826; AAO26796.1; -; Genomic_DNA.
DR   RefSeq; WP_011091197.1; NC_004545.1.
DR   AlphaFoldDB; Q89B06; -.
DR   STRING; 224915.bbp_057; -.
DR   EnsemblBacteria; AAO26796; AAO26796; bbp_057.
DR   GeneID; 56470601; -.
DR   KEGG; bab:bbp_057; -.
DR   eggNOG; COG0617; Bacteria.
DR   HOGENOM; CLU_015961_1_1_6; -.
DR   OMA; RRENIIY; -.
DR   OrthoDB; 2018439at2; -.
DR   Proteomes; UP000000601; Chromosome.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0052929; F:ATP:3'-cytidine-cytidine-tRNA adenylyltransferase activity; IEA:UniProtKB-EC.
DR   GO; GO:0052928; F:CTP:3'-cytidine-tRNA cytidylyltransferase activity; IEA:UniProtKB-EC.
DR   GO; GO:0052927; F:CTP:tRNA cytidylyltransferase activity; IEA:UniProtKB-EC.
DR   GO; GO:0000287; F:magnesium ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0000049; F:tRNA binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0016437; F:tRNA cytidylyltransferase activity; 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; cd05398; NT_ClassII-CCAase; 1.
DR   Gene3D; 3.30.460.10; -; 1.
DR   HAMAP; MF_01262; CCA_bact_type2; 1.
DR   InterPro; IPR012006; CCA_bact.
DR   InterPro; IPR043519; NT_sf.
DR   InterPro; IPR002646; PolA_pol_head_dom.
DR   InterPro; IPR032828; PolyA_RNA-bd.
DR   Pfam; PF01743; PolyA_pol; 1.
DR   Pfam; PF12627; PolyA_pol_RNAbd; 1.
DR   PIRSF; PIRSF000813; CCA_bact; 1.
DR   SUPFAM; SSF81301; SSF81301; 1.
PE   3: Inferred from homology;
KW   ATP-binding; Magnesium; Metal-binding; Nucleotide-binding;
KW   Nucleotidyltransferase; Reference proteome; RNA repair; RNA-binding;
KW   Transferase; tRNA processing.
FT   CHAIN           1..419
FT                   /note="CCA-adding enzyme"
FT                   /id="PRO_0000139019"
FT   BINDING         8
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01262"
FT   BINDING         8
FT                   /ligand="CTP"
FT                   /ligand_id="ChEBI:CHEBI:37563"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01262"
FT   BINDING         11
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01262"
FT   BINDING         11
FT                   /ligand="CTP"
FT                   /ligand_id="ChEBI:CHEBI:37563"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01262"
FT   BINDING         21
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01262"
FT   BINDING         23
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01262"
FT   BINDING         91
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01262"
FT   BINDING         91
FT                   /ligand="CTP"
FT                   /ligand_id="ChEBI:CHEBI:37563"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01262"
FT   BINDING         137
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01262"
FT   BINDING         137
FT                   /ligand="CTP"
FT                   /ligand_id="ChEBI:CHEBI:37563"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01262"
FT   BINDING         140
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01262"
FT   BINDING         140
FT                   /ligand="CTP"
FT                   /ligand_id="ChEBI:CHEBI:37563"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01262"
SQ   SEQUENCE   419 AA;  49614 MW;  A8C5D8926575D90A CRC64;
     MKVYLVGGAI RNKFLNLPVQ DRDWVVVGAT PEILLSLKFK QVGKGFPVFL HPYSKEEYSL
     ARVDRKIGVG HTGFSFDYSN KVTLKEDLMR RDLTINAIAQ DNNGNYIDPF KGIRDIKNRI
     LRHVSPAFSE DPLRVLRIAR FCALFHHLGF RIATETMKIM SIVVKNNELL NLTRDRVWKE
     TEKAFNTDNP HVYFQVLKNC NALSVIFPEI NLVYQRQYYC IDNMYHNFYD TFDIFMGLAE
     LSKISRDIDI RFSYLFFCIN RMLFIDTSSY ILVINQKELV RYFKALCQRF CIPAYIKNVS
     ICFSRFYKFL SVIHYQSSKD IIMFFYIIDA WRKPYMIRKL SVLNNFCVSR NAYFKNITCQ
     QYPRNFLKYA FNVANKISIK PILKMGFSGL QIKYELIRLR INAIENWRQN ITVYKKCCF
 
 
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