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Database: UniProt
Entry: I7L047_METBM
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Original site: I7L047_METBM 
ID   I7L047_METBM            Unreviewed;        94 AA.
AC   I7L047;
DT   03-OCT-2012, integrated into UniProtKB/TrEMBL.
DT   03-OCT-2012, sequence version 1.
DT   24-JAN-2024, entry version 55.
DE   RecName: Full=Tetrahydromethanopterin S-methyltransferase subunit B {ECO:0000256|ARBA:ARBA00015127, ECO:0000256|HAMAP-Rule:MF_01094};
DE            EC=2.1.1.86 {ECO:0000256|ARBA:ARBA00012514, ECO:0000256|HAMAP-Rule:MF_01094};
DE   AltName: Full=N5-methyltetrahydromethanopterin--coenzyme M methyltransferase subunit B {ECO:0000256|ARBA:ARBA00029818, ECO:0000256|HAMAP-Rule:MF_01094};
GN   Name=mtrB {ECO:0000256|HAMAP-Rule:MF_01094,
GN   ECO:0000313|EMBL:CCJ36665.1};
GN   OrderedLocusNames=BN140_1742 {ECO:0000313|EMBL:CCJ36665.1};
OS   Methanoculleus bourgensis (strain ATCC 43281 / DSM 3045 / OCM 15 / MS2)
OS   (Methanogenium bourgense).
OC   Archaea; Euryarchaeota; Stenosarchaea group; Methanomicrobia;
OC   Methanomicrobiales; Methanomicrobiaceae; Methanoculleus.
OX   NCBI_TaxID=1201294 {ECO:0000313|EMBL:CCJ36665.1, ECO:0000313|Proteomes:UP000009007};
RN   [1] {ECO:0000313|Proteomes:UP000009007}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 43281 / DSM 3045 / OCM 15 / MS2
RC   {ECO:0000313|Proteomes:UP000009007};
RX   PubMed=22965103; DOI=10.1128/JB.01292-12;
RA   Maus I., Wibberg D., Stantscheff R., Eikmeyer F.G., Seffner A., Boelter J.,
RA   Szczepanowski R., Blom J., Jaenicke S., Konig H., Puhler A., Schluter A.;
RT   "Complete genome sequence of the hydrogenotrophic, methanogenic archaeon
RT   Methanoculleus bourgensis strain MS2T, isolated from a sewage sludge
RT   digester.";
RL   J. Bacteriol. 194:5487-5488(2012).
CC   -!- FUNCTION: Part of a complex that catalyzes the formation of methyl-
CC       coenzyme M and tetrahydromethanopterin from coenzyme M and methyl-
CC       tetrahydromethanopterin. This is an energy-conserving, sodium-ion
CC       translocating step. {ECO:0000256|ARBA:ARBA00002533, ECO:0000256|HAMAP-
CC       Rule:MF_01094}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=5-methyl-5,6,7,8-tetrahydromethanopterin + coenzyme M + 2
CC         Na(+)(in) = 5,6,7,8-tetrahydromethanopterin + methyl-coenzyme M + 2
CC         Na(+)(out); Xref=Rhea:RHEA:53492, ChEBI:CHEBI:29101,
CC         ChEBI:CHEBI:58103, ChEBI:CHEBI:58116, ChEBI:CHEBI:58286,
CC         ChEBI:CHEBI:58319; EC=2.1.1.86;
CC         Evidence={ECO:0000256|ARBA:ARBA00001816, ECO:0000256|HAMAP-
CC         Rule:MF_01094};
CC   -!- PATHWAY: One-carbon metabolism; methanogenesis from CO(2); methyl-
CC       coenzyme M from 5,10-methylene-5,6,7,8-tetrahydromethanopterin: step
CC       2/2. {ECO:0000256|ARBA:ARBA00004839, ECO:0000256|HAMAP-Rule:MF_01094}.
CC   -!- SUBUNIT: The complex is composed of 8 subunits; MtrA, MtrB, MtrC, MtrD,
CC       MtrE, MtrF, MtrG and MtrH. {ECO:0000256|ARBA:ARBA00011616,
CC       ECO:0000256|HAMAP-Rule:MF_01094}.
CC   -!- SUBCELLULAR LOCATION: Cell membrane {ECO:0000256|ARBA:ARBA00004162,
CC       ECO:0000256|HAMAP-Rule:MF_01094}; Single-pass membrane protein
CC       {ECO:0000256|ARBA:ARBA00004162, ECO:0000256|HAMAP-Rule:MF_01094}.
CC       Membrane {ECO:0000256|ARBA:ARBA00004167}; Single-pass membrane protein
CC       {ECO:0000256|ARBA:ARBA00004167}.
CC   -!- SIMILARITY: Belongs to the MtrB family. {ECO:0000256|ARBA:ARBA00010027,
CC       ECO:0000256|HAMAP-Rule:MF_01094}.
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DR   EMBL; HE964772; CCJ36665.1; -; Genomic_DNA.
DR   RefSeq; WP_014867639.1; NC_018227.2.
DR   AlphaFoldDB; I7L047; -.
DR   STRING; 1201294.BN140_1742; -.
DR   GeneID; 13355154; -.
DR   KEGG; mbg:BN140_1742; -.
DR   PATRIC; fig|1201294.9.peg.1910; -.
DR   HOGENOM; CLU_171544_1_0_2; -.
DR   OMA; TNMVYGF; -.
DR   BioCyc; MBOU1201294:BN140_RS08705-MONOMER; -.
DR   UniPathway; UPA00640; UER00698.
DR   Proteomes; UP000009007; Chromosome.
DR   GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0030269; F:tetrahydromethanopterin S-methyltransferase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0019386; P:methanogenesis, from carbon dioxide; IEA:UniProtKB-UniPathway.
DR   GO; GO:0032259; P:methylation; IEA:UniProtKB-KW.
DR   GO; GO:0006730; P:one-carbon metabolic process; IEA:UniProtKB-UniRule.
DR   HAMAP; MF_01094; MtrB; 1.
DR   InterPro; IPR008690; MtrB_MeTrfase.
DR   NCBIfam; TIGR04166; methano_MtrB; 1.
DR   Pfam; PF05440; MtrB; 1.
DR   PIRSF; PIRSF005518; MtrB; 1.
PE   3: Inferred from homology;
KW   Cell membrane {ECO:0000256|HAMAP-Rule:MF_01094};
KW   Membrane {ECO:0000256|HAMAP-Rule:MF_01094};
KW   Methanogenesis {ECO:0000256|HAMAP-Rule:MF_01094};
KW   Methyltransferase {ECO:0000256|HAMAP-Rule:MF_01094,
KW   ECO:0000313|EMBL:CCJ36665.1};
KW   One-carbon metabolism {ECO:0000256|HAMAP-Rule:MF_01094};
KW   Reference proteome {ECO:0000313|Proteomes:UP000009007};
KW   Transferase {ECO:0000256|HAMAP-Rule:MF_01094, ECO:0000313|EMBL:CCJ36665.1};
KW   Transmembrane {ECO:0000256|HAMAP-Rule:MF_01094};
KW   Transmembrane helix {ECO:0000256|HAMAP-Rule:MF_01094}.
FT   TRANSMEM        74..93
FT                   /note="Helical"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01094"
SQ   SEQUENCE   94 AA;  9773 MW;  B3E67E512894BBD9 CRC64;
     MAYIQVLPEY GLVVDPMVGV VTTAGVSYTP VIEQVAELEK ITDDLVGMLS GEGNFLASFP
     NRDGVLKIAG GVTAFWYGMA VGLLVAGVIA LGLL
//
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