ID   CMOB_ALIFM              Reviewed;         324 AA.
AC   B5FCP7;
DT   14-APR-2009, integrated into UniProtKB/Swiss-Prot.
DT   14-OCT-2008, sequence version 1.
DT   10-JUN-2026, entry version 85.
DE   RecName: Full=tRNA U34 carboxymethyltransferase {ECO:0000255|HAMAP-Rule:MF_01590};
DE            EC=2.5.1.- {ECO:0000255|HAMAP-Rule:MF_01590};
GN   Name=cmoB {ECO:0000255|HAMAP-Rule:MF_01590};
GN   OrderedLocusNames=VFMJ11_0988;
OS   Aliivibrio fischeri (strain MJ11) (Vibrio fischeri).
OC   Bacteria; Pseudomonadati; Pseudomonadota; Gammaproteobacteria; Vibrionales;
OC   Vibrionaceae; Aliivibrio.
OX   NCBI_TaxID=388396;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=MJ11;
RA   Mandel M.J., Stabb E.V., Ruby E.G., Ferriera S., Johnson J., Kravitz S.,
RA   Beeson K., Sutton G., Rogers Y.-H., Friedman R., Frazier M., Venter J.C.;
RT   "Complete sequence of Vibrio fischeri strain MJ11.";
RL   Submitted (AUG-2008) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Catalyzes carboxymethyl transfer from carboxy-S-adenosyl-L-
CC       methionine (Cx-SAM) to 5-hydroxyuridine (ho5U) to form 5-
CC       carboxymethoxyuridine (cmo5U) at position 34 in tRNAs.
CC       {ECO:0000255|HAMAP-Rule:MF_01590}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=carboxy-S-adenosyl-L-methionine + 5-hydroxyuridine(34) in tRNA
CC         = 5-carboxymethoxyuridine(34) in tRNA + S-adenosyl-L-homocysteine +
CC         H(+); Xref=Rhea:RHEA:52848, Rhea:RHEA-COMP:13381, Rhea:RHEA-
CC         COMP:13383, ChEBI:CHEBI:15378, ChEBI:CHEBI:57856, ChEBI:CHEBI:134278,
CC         ChEBI:CHEBI:136877, ChEBI:CHEBI:136879; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_01590};
CC   -!- SUBUNIT: Homotetramer. {ECO:0000255|HAMAP-Rule:MF_01590}.
CC   -!- SIMILARITY: Belongs to the class I-like SAM-binding methyltransferase
CC       superfamily. CmoB family. {ECO:0000255|HAMAP-Rule:MF_01590}.
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DR   EMBL; CP001139; ACH65286.1; -; Genomic_DNA.
DR   RefSeq; WP_012532950.1; NC_011184.1.
DR   AlphaFoldDB; B5FCP7; -.
DR   SMR; B5FCP7; -.
DR   KEGG; vfm:VFMJ11_0988; -.
DR   HOGENOM; CLU_052665_0_0_6; -.
DR   GO; GO:0016765; F:transferase activity, transferring alkyl or aryl (other than methyl) groups; IEA:UniProtKB-UniRule.
DR   GO; GO:0002098; P:tRNA wobble uridine modification; IEA:InterPro.
DR   CDD; cd02440; AdoMet_MTases; 1.
DR   Gene3D; 3.40.50.150; Vaccinia Virus protein VP39; 1.
DR   HAMAP; MF_01590; tRNA_carboxymethyltr_CmoB; 1.
DR   InterPro; IPR010017; CmoB.
DR   InterPro; IPR027555; Mo5U34_MeTrfas-like.
DR   InterPro; IPR029063; SAM-dependent_MTases_sf.
DR   NCBIfam; NF011650; PRK15068.1; 1.
DR   NCBIfam; TIGR00452; tRNA 5-methoxyuridine(34)/uridine 5-oxyacetic acid(34) synthase CmoB; 1.
DR   PANTHER; PTHR43861; TRANS-ACONITATE 2-METHYLTRANSFERASE-RELATED; 1.
DR   Pfam; PF08003; Methyltransf_9; 1.
DR   SUPFAM; SSF53335; S-adenosyl-L-methionine-dependent methyltransferases; 1.
PE   3: Inferred from homology;
KW   Transferase; tRNA processing.
FT   CHAIN           1..324
FT                   /note="tRNA U34 carboxymethyltransferase"
FT                   /id="PRO_1000201315"
FT   BINDING         91
FT                   /ligand="carboxy-S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:134278"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01590"
FT   BINDING         105
FT                   /ligand="carboxy-S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:134278"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01590"
FT   BINDING         110
FT                   /ligand="carboxy-S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:134278"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01590"
FT   BINDING         130
FT                   /ligand="carboxy-S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:134278"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01590"
FT   BINDING         152..154
FT                   /ligand="carboxy-S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:134278"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01590"
FT   BINDING         181..182
FT                   /ligand="carboxy-S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:134278"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01590"
FT   BINDING         196
FT                   /ligand="carboxy-S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:134278"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01590"
FT   BINDING         200
FT                   /ligand="carboxy-S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:134278"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01590"
FT   BINDING         315
FT                   /ligand="carboxy-S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:134278"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01590"
SQ   SEQUENCE   324 AA;  37249 MW;  BDD28AE32F4388E7 CRC64;
     MFNFANFYQL LAQDTVLQPW LNTLPQQLTD WQNAEHGDIE RWIKALKKIP EGCADNIDLK
     SSVTLSNNTP LIDGERKKLE NLLQTFHPWR KGPFTVHDIH IDTEWRSDWK WDRLLPHITP
     LKNRSVLDVG CGNGYHMWRM LGEEARLCVG IDPSHLFLIQ FEAIRKLMGN DQRAHLLPLG
     IEQLPELNAF DTVFSMGVLY HRRSPLDHLI QLKNQLVAGG ELVLETLVID GDENAVLMPV
     DRYAQMRNVY FFPSARALKV WLESVGFVDV KIVDECVTTT GEQRSTEWMK HNSLPEYLDP
     NDSTKTIEGH PAPKRAILIA KKPD
//