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CCA_BUCAT
ID   CCA_BUCAT               Reviewed;         414 AA.
AC   B8D6X3;
DT   28-JUL-2009, integrated into UniProtKB/Swiss-Prot.
DT   03-MAR-2009, sequence version 1.
DT   03-AUG-2022, entry version 58.
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=BUAPTUC7_061;
OS   Buchnera aphidicola subsp. Acyrthosiphon pisum (strain Tuc7).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC   Erwiniaceae; Buchnera.
OX   NCBI_TaxID=561501;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Tuc7;
RX   PubMed=19150844; DOI=10.1126/science.1167140;
RA   Moran N.A., McLaughlin H.J., Sorek R.;
RT   "The dynamics and time scale of ongoing genomic erosion in symbiotic
RT   bacteria.";
RL   Science 323:379-382(2009).
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; CP001158; ACL29888.1; -; Genomic_DNA.
DR   RefSeq; WP_012619414.1; NC_011834.1.
DR   AlphaFoldDB; B8D6X3; -.
DR   SMR; B8D6X3; -.
DR   KEGG; bau:BUAPTUC7_061; -.
DR   HOGENOM; CLU_015961_1_1_6; -.
DR   OMA; GWTFHGH; -.
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   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; RNA repair; RNA-binding; Transferase;
KW   tRNA processing.
FT   CHAIN           1..414
FT                   /note="CCA-adding enzyme"
FT                   /id="PRO_1000165128"
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   414 AA;  48825 MW;  904D4F434FA7D4B7 CRC64;
     MKIYLVGGAV RDSLLNLPVK DKDWVVVGGT EKILLERNFQ QVGKDFPVFL HPETHEEYAL
     ARKERKSGKG YTGFDTDCNS DVTLEEDLIR RDLTINAIAQ DEYGNYIDPF QGKKDIECGL
     IRHVSESFIE DPLRVLRVAR FAATLVHLGF KIAEETMLLM CIIVKKQELS YLTSNRIWNE
     TEKALKTLNP HVYFQVLYEC NALHFFFPEM YFLYEKKNFL NRSFFKKFCN KNIILMGLAE
     ISLLNKDIDV RFSYLCQFLS VNQIDRNYSK IFFDSYAASI IHSLCKRFKI PSYIRDIAVL
     NTGFYFFLNT IHYQSSKNII NLFSKVDAWR KPDRVKKLAF LSNFNFLRNF KSEFFCIKSG
     CFLEKCFSVV KNVSIKLILK KGFKGYEIKQ EITRLRIKKL EFWRIKNIKH RFYL
 
 
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