ID   TRMB_TRIEI              Reviewed;         220 AA.
AC   Q117P8;
DT   29-MAY-2007, integrated into UniProtKB/Swiss-Prot.
DT   22-AUG-2006, sequence version 1.
DT   27-MAR-2024, entry version 97.
DE   RecName: Full=tRNA (guanine-N(7)-)-methyltransferase {ECO:0000255|HAMAP-Rule:MF_01057};
DE            EC=2.1.1.33 {ECO:0000255|HAMAP-Rule:MF_01057};
DE   AltName: Full=tRNA (guanine(46)-N(7))-methyltransferase {ECO:0000255|HAMAP-Rule:MF_01057};
DE   AltName: Full=tRNA(m7G46)-methyltransferase {ECO:0000255|HAMAP-Rule:MF_01057};
GN   Name=trmB {ECO:0000255|HAMAP-Rule:MF_01057};
GN   OrderedLocusNames=Tery_0871;
OS   Trichodesmium erythraeum (strain IMS101).
OC   Bacteria; Cyanobacteriota; Cyanophyceae; Oscillatoriophycideae;
OC   Oscillatoriales; Microcoleaceae; Trichodesmium.
OX   NCBI_TaxID=203124;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=IMS101;
RX   PubMed=25831533; DOI=10.1073/pnas.1422332112;
RA   Walworth N., Pfreundt U., Nelson W.C., Mincer T., Heidelberg J.F., Fu F.,
RA   Waterbury J.B., Glavina del Rio T., Goodwin L., Kyrpides N.C., Land M.L.,
RA   Woyke T., Hutchins D.A., Hess W.R., Webb E.A.;
RT   "Trichodesmium genome maintains abundant, widespread noncoding DNA in situ,
RT   despite oligotrophic lifestyle.";
RL   Proc. Natl. Acad. Sci. U.S.A. 112:4251-4256(2015).
CC   -!- FUNCTION: Catalyzes the formation of N(7)-methylguanine at position 46
CC       (m7G46) in tRNA. {ECO:0000255|HAMAP-Rule:MF_01057}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=guanosine(46) in tRNA + S-adenosyl-L-methionine = N(7)-
CC         methylguanosine(46) in tRNA + S-adenosyl-L-homocysteine;
CC         Xref=Rhea:RHEA:42708, Rhea:RHEA-COMP:10188, Rhea:RHEA-COMP:10189,
CC         ChEBI:CHEBI:57856, ChEBI:CHEBI:59789, ChEBI:CHEBI:74269,
CC         ChEBI:CHEBI:74480; EC=2.1.1.33; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_01057};
CC   -!- PATHWAY: tRNA modification; N(7)-methylguanine-tRNA biosynthesis.
CC       {ECO:0000255|HAMAP-Rule:MF_01057}.
CC   -!- SIMILARITY: Belongs to the class I-like SAM-binding methyltransferase
CC       superfamily. TrmB family. {ECO:0000255|HAMAP-Rule:MF_01057}.
CC   ---------------------------------------------------------------------------
CC   Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC   Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC   ---------------------------------------------------------------------------
DR   EMBL; CP000393; ABG50276.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q117P8; -.
DR   SMR; Q117P8; -.
DR   STRING; 203124.Tery_0871; -.
DR   KEGG; ter:Tery_0871; -.
DR   eggNOG; COG0220; Bacteria.
DR   HOGENOM; CLU_050910_1_3_3; -.
DR   OrthoDB; 9802090at2; -.
DR   UniPathway; UPA00989; -.
DR   GO; GO:0008176; F:tRNA (guanine(46)-N7)-methyltransferase activity; IEA:UniProtKB-UniRule.
DR   Gene3D; 3.40.50.150; Vaccinia Virus protein VP39; 1.
DR   HAMAP; MF_01057; tRNA_methyltr_TrmB; 1.
DR   InterPro; IPR029063; SAM-dependent_MTases_sf.
DR   InterPro; IPR003358; tRNA_(Gua-N-7)_MeTrfase_Trmb.
DR   NCBIfam; TIGR00091; tRNA (guanosine(46)-N7)-methyltransferase TrmB; 1.
DR   PANTHER; PTHR23417; 3-DEOXY-D-MANNO-OCTULOSONIC-ACID TRANSFERASE/TRNA GUANINE-N 7 - -METHYLTRANSFERASE; 1.
DR   PANTHER; PTHR23417:SF21; TRNA (GUANINE-N(7)-)-METHYLTRANSFERASE; 1.
DR   Pfam; PF02390; Methyltransf_4; 1.
DR   SUPFAM; SSF53335; S-adenosyl-L-methionine-dependent methyltransferases; 1.
DR   PROSITE; PS51625; SAM_MT_TRMB; 1.
PE   3: Inferred from homology;
KW   Methyltransferase; S-adenosyl-L-methionine; Transferase; tRNA processing.
FT   CHAIN           1..220
FT                   /note="tRNA (guanine-N(7)-)-methyltransferase"
FT                   /id="PRO_0000288247"
FT   ACT_SITE        118
FT                   /evidence="ECO:0000250"
FT   BINDING         40
FT                   /ligand="S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:59789"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01057"
FT   BINDING         65
FT                   /ligand="S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:59789"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01057"
FT   BINDING         92
FT                   /ligand="S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:59789"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01057"
FT   BINDING         118
FT                   /ligand="S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:59789"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01057"
FT   BINDING         122
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01057"
FT   BINDING         154
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01057"
SQ   SEQUENCE   220 AA;  25717 MW;  1EAF44D3A5B63665 CRC64;
     MVRVRIRQHV NPLASKYQQS VTIPNFSDIY ADIKKPLYLD IGCARGRFLW QMAQVEPEWN
     FLGLEIREPL VIEANNWRDE KGLNNLHYLF CNANISLGKI FESFPKGILK KVSILFPDPW
     FKRRHQTRRV VQPKLVEDLA NYLTVGGEVF LHSDIEKVAK EMCNRFSAHG SFYRSYNDWL
     KENILPVLSE REKVTLGKNQ PVYRALFIKL EEPTPNIISP
//