ID A0A1G8S9I3_9ACTN Unreviewed; 326 AA.
AC A0A1G8S9I3;
DT 22-NOV-2017, integrated into UniProtKB/TrEMBL.
DT 22-NOV-2017, sequence version 1.
DT 24-JAN-2024, entry version 20.
DE RecName: Full=Histidine N-alpha-methyltransferase {ECO:0000256|HAMAP-Rule:MF_02037};
DE EC=2.1.1.44 {ECO:0000256|HAMAP-Rule:MF_02037};
DE AltName: Full=Histidine trimethyltransferase {ECO:0000256|HAMAP-Rule:MF_02037};
GN Name=egtD {ECO:0000256|HAMAP-Rule:MF_02037};
GN ORFNames=SAMN05421874_101207 {ECO:0000313|EMBL:SDJ25330.1};
OS Nonomuraea maritima.
OC Bacteria; Actinomycetota; Actinomycetes; Streptosporangiales;
OC Streptosporangiaceae; Nonomuraea.
OX NCBI_TaxID=683260 {ECO:0000313|EMBL:SDJ25330.1, ECO:0000313|Proteomes:UP000198683};
RN [1] {ECO:0000313|EMBL:SDJ25330.1, ECO:0000313|Proteomes:UP000198683}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=CGMCC 4.5681 {ECO:0000313|EMBL:SDJ25330.1,
RC ECO:0000313|Proteomes:UP000198683};
RA de Groot N.N.;
RL Submitted (OCT-2016) to the EMBL/GenBank/DDBJ databases.
CC -!- FUNCTION: Catalyzes the SAM-dependent triple methylation of the alpha-
CC amino group of histidine to form hercynine, a step in the biosynthesis
CC pathway of ergothioneine. {ECO:0000256|HAMAP-Rule:MF_02037}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=L-histidine + 3 S-adenosyl-L-methionine = 3 H(+) + hercynine +
CC 3 S-adenosyl-L-homocysteine; Xref=Rhea:RHEA:38471, ChEBI:CHEBI:15378,
CC ChEBI:CHEBI:15781, ChEBI:CHEBI:57595, ChEBI:CHEBI:57856,
CC ChEBI:CHEBI:59789; EC=2.1.1.44; Evidence={ECO:0000256|HAMAP-
CC Rule:MF_02037};
CC -!- PATHWAY: Amino-acid biosynthesis; ergothioneine biosynthesis.
CC {ECO:0000256|HAMAP-Rule:MF_02037}.
CC -!- SUBUNIT: Monomer. {ECO:0000256|HAMAP-Rule:MF_02037}.
CC -!- SIMILARITY: Belongs to the methyltransferase superfamily. EgtD family.
CC {ECO:0000256|HAMAP-Rule:MF_02037}.
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DR EMBL; FNFB01000001; SDJ25330.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A1G8S9I3; -.
DR STRING; 683260.SAMN05421874_101207; -.
DR OrthoDB; 5289726at2; -.
DR UniPathway; UPA01014; -.
DR Proteomes; UP000198683; Unassembled WGS sequence.
DR GO; GO:0030745; F:dimethylhistidine N-methyltransferase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0008276; F:protein methyltransferase activity; IEA:InterPro.
DR GO; GO:0052699; P:ergothioneine biosynthetic process; IEA:UniProtKB-UniRule.
DR GO; GO:0032259; P:methylation; IEA:UniProtKB-KW.
DR Gene3D; 3.40.50.150; Vaccinia Virus protein VP39; 1.
DR HAMAP; MF_02037; EgtD; 1.
DR InterPro; IPR035094; EgtD.
DR InterPro; IPR032888; EgtD_Actinobacteria.
DR InterPro; IPR019257; MeTrfase_dom.
DR InterPro; IPR017804; MeTrfase_EgtD-like.
DR InterPro; IPR029063; SAM-dependent_MTases_sf.
DR NCBIfam; TIGR03438; egtD_ergothio; 1.
DR PANTHER; PTHR43397; ERGOTHIONEINE BIOSYNTHESIS PROTEIN 1; 1.
DR PANTHER; PTHR43397:SF1; ERGOTHIONEINE BIOSYNTHESIS PROTEIN 1; 1.
DR Pfam; PF10017; Methyltransf_33; 1.
DR PIRSF; PIRSF018005; UCP018005; 1.
DR SUPFAM; SSF53335; S-adenosyl-L-methionine-dependent methyltransferases; 1.
PE 3: Inferred from homology;
KW Methyltransferase {ECO:0000256|ARBA:ARBA00022603, ECO:0000256|HAMAP-
KW Rule:MF_02037}; Reference proteome {ECO:0000313|Proteomes:UP000198683};
KW S-adenosyl-L-methionine {ECO:0000256|HAMAP-Rule:MF_02037};
KW Transferase {ECO:0000256|ARBA:ARBA00022679, ECO:0000256|HAMAP-
KW Rule:MF_02037}.
FT DOMAIN 24..324
FT /note="Histidine-specific methyltransferase SAM-dependent"
FT /evidence="ECO:0000259|Pfam:PF10017"
FT BINDING 61
FT /ligand="L-histidine"
FT /ligand_id="ChEBI:CHEBI:57595"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02037"
FT BINDING 91
FT /ligand="S-adenosyl-L-methionine"
FT /ligand_id="ChEBI:CHEBI:59789"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02037"
FT BINDING 97
FT /ligand="S-adenosyl-L-methionine"
FT /ligand_id="ChEBI:CHEBI:59789"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02037"
FT BINDING 118
FT /ligand="S-adenosyl-L-methionine"
FT /ligand_id="ChEBI:CHEBI:59789"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02037"
FT BINDING 146..147
FT /ligand="S-adenosyl-L-methionine"
FT /ligand_id="ChEBI:CHEBI:59789"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02037"
FT BINDING 171
FT /ligand="L-histidine"
FT /ligand_id="ChEBI:CHEBI:57595"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02037"
FT BINDING 211
FT /ligand="L-histidine"
FT /ligand_id="ChEBI:CHEBI:57595"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02037"
FT BINDING 287..289
FT /ligand="L-histidine"
FT /ligand_id="ChEBI:CHEBI:57595"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02037"
SQ SEQUENCE 326 AA; 36595 MW; 7092211C9DF8E9BD CRC64;
MAVSRTPVKV INHLDRDHLR QALEHDVTTG LTAASKWLPP KWFYDRTGSE LFSRITRLRE
YYPTRRELSI LRQRSGELAA ASAADTLVEL GSGTSEKTVL LLEALKSAGT LHGYTPVDVD
AVTLESAARR LSVTFPLLDI RPVCADFECH LSRLPQNGRR MVAFLGGTIG NMEPASRAVF
LKELHAALRP GESFLLGADL VKDPARLVAA YDDAEGVTAE FNRNVLRVIN RELRADFEPE
AFTHVAVYDE RHEWIEMRLR ATRRMRVWVD ALGLAVHFAE GEELRTEISA KFRLEGLRAE
LQAAGLRVRR HYTDPDGDFA LLLAAR
//
