CCA_BACC0
ID CCA_BACC0 Reviewed; 397 AA.
AC B7JH21;
DT 14-APR-2009, integrated into UniProtKB/Swiss-Prot.
DT 10-FEB-2009, sequence version 1.
DT 03-AUG-2022, entry version 62.
DE RecName: Full=CCA-adding enzyme {ECO:0000255|HAMAP-Rule:MF_01263};
DE EC=2.7.7.72 {ECO:0000255|HAMAP-Rule:MF_01263};
DE AltName: Full=CCA tRNA nucleotidyltransferase {ECO:0000255|HAMAP-Rule:MF_01263};
DE AltName: Full=tRNA CCA-pyrophosphorylase {ECO:0000255|HAMAP-Rule:MF_01263};
DE AltName: Full=tRNA adenylyl-/cytidylyl- transferase {ECO:0000255|HAMAP-Rule:MF_01263};
DE AltName: Full=tRNA nucleotidyltransferase {ECO:0000255|HAMAP-Rule:MF_01263};
DE AltName: Full=tRNA-NT {ECO:0000255|HAMAP-Rule:MF_01263};
GN Name=cca {ECO:0000255|HAMAP-Rule:MF_01263}; OrderedLocusNames=BCAH820_1630;
OS Bacillus cereus (strain AH820).
OC Bacteria; Firmicutes; Bacilli; Bacillales; Bacillaceae; Bacillus;
OC Bacillus cereus group.
OX NCBI_TaxID=405535;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=AH820;
RA Dodson R.J., Durkin A.S., Rosovitz M.J., Rasko D.A., Hoffmaster A.,
RA Ravel J., Sutton G.;
RT "Genome sequence of Bacillus cereus AH820.";
RL Submitted (OCT-2008) 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. {ECO:0000255|HAMAP-Rule:MF_01263}.
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_01263};
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_01263};
CC -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_01263}.
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_01263}.
CC -!- SIMILARITY: Belongs to the tRNA nucleotidyltransferase/poly(A)
CC polymerase family. Bacterial CCA-adding enzyme type 3 subfamily.
CC {ECO:0000255|HAMAP-Rule:MF_01263}.
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DR EMBL; CP001283; ACK90853.1; -; Genomic_DNA.
DR RefSeq; WP_000439304.1; NC_011773.1.
DR AlphaFoldDB; B7JH21; -.
DR SMR; B7JH21; -.
DR EnsemblBacteria; ACK90853; ACK90853; BCAH820_1630.
DR GeneID; 45021531; -.
DR KEGG; bcu:BCAH820_1630; -.
DR HOGENOM; CLU_015961_3_0_9; -.
DR OMA; MRAVRFM; -.
DR Proteomes; UP000001363; 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_01263; CCA_bact_type3; 1.
DR InterPro; IPR032810; CCA-adding_enz_C.
DR InterPro; IPR023068; CCA-adding_enz_firmicutes.
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 Pfam; PF13735; tRNA_NucTran2_2; 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..397
FT /note="CCA-adding enzyme"
FT /id="PRO_1000140068"
FT BINDING 26
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01263"
FT BINDING 26
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01263"
FT BINDING 29
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01263"
FT BINDING 29
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01263"
FT BINDING 39
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01263"
FT BINDING 41
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01263"
FT BINDING 110
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01263"
FT BINDING 110
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01263"
FT BINDING 153
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01263"
FT BINDING 153
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01263"
FT BINDING 156
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01263"
FT BINDING 156
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01263"
FT BINDING 159
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01263"
FT BINDING 159
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01263"
FT BINDING 162
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01263"
FT BINDING 162
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01263"
SQ SEQUENCE 397 AA; 45932 MW; 04D460BEDDF1B862 CRC64;
MERFKKASSI IETLKQQGHE AYFVGGSVRD LIIDRPIGDI DIATSALPEE VMAIFPRHVP
VGLEHGTVIV VENGEPYEVT TFRTESEYED FRRPSSVQFV RSLEEDLKRR DFTMNAIAMT
EEGEMVDLFA GQEAIQKREI VTVGNAADRF QEDALRMMRG IRFVSTLGFS LETKTKQAIE
TYGHLLEHIA IERITVEFEK LLTGTYCVKG LKELVETKLF SHLPYLQMSE ERLLKATQYN
WDSFETDIEA WAFFLYCIGE EHPSVFLRQW KFSNKKIKDI VAVLLTIRKR KEKDWDTVLL
YKTGIHIAEM AERVYEAMIE SYDHTSVERV QTLFQALPIK SRQEMDVTGN DLLNWASKKP
GPWVAEMIQK IEEAIVQGNV VNEKECIREW LQECNLL
