ID   MTRE_METVA              Reviewed;          85 AA.
AC   Q50830;
DT   01-NOV-1997, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1997, sequence version 1.
DT   25-MAY-2022, entry version 71.
DE   RecName: Full=Tetrahydromethanopterin S-methyltransferase subunit E;
DE            EC=2.1.1.86;
DE   AltName: Full=N5-methyltetrahydromethanopterin--coenzyme M methyltransferase subunit E;
DE   Flags: Fragment;
GN   Name=mtrE;
OS   Methanococcus vannielii.
OC   Archaea; Euryarchaeota; Methanomada group; Methanococci; Methanococcales;
OC   Methanococcaceae; Methanococcus.
OX   NCBI_TaxID=2187;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RA   Noelling J., Elfner A., Palmer J.R., Steigerwald V.J., Pihl T.D.,
RA   Lake J.A., Reeve J.N.;
RL   Submitted (JUN-1996) to the EMBL/GenBank/DDBJ databases.
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:0000250}.
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   -!- 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.
CC   -!- SUBUNIT: The complex is composed of 8 subunits; MtrA, MtrB, MtrC, MtrD,
CC       MtrE, MtrF, MtrG and MtrH. {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Cell membrane {ECO:0000305}; Multi-pass membrane
CC       protein {ECO:0000305}.
CC   -!- SIMILARITY: Belongs to the MtrE family. {ECO:0000305}.
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DR   EMBL; U57339; AAB02005.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q50830; -.
DR   UniPathway; UPA00640; UER00698.
DR   GO; GO:0005737; C:cytoplasm; IEA:InterPro.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0012506; C:vesicle membrane; IEA:InterPro.
DR   GO; GO:0030269; F:tetrahydromethanopterin S-methyltransferase activity; IEA:UniProtKB-EC.
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-KW.
DR   GO; GO:0006814; P:sodium ion transport; IEA:InterPro.
DR   InterPro; IPR005780; MeTrfase_E.
DR   Pfam; PF04206; MtrE; 1.
PE   3: Inferred from homology;
KW   Cell membrane; Membrane; Methanogenesis; Methyltransferase;
KW   One-carbon metabolism; Transferase; Transmembrane; Transmembrane helix.
FT   CHAIN           1..>85
FT                   /note="Tetrahydromethanopterin S-methyltransferase subunit
FT                   E"
FT                   /id="PRO_0000147545"
FT   TRANSMEM        4..24
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        63..83
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   NON_TER         85
SQ   SEQUENCE   85 AA;  8592 MW;  8EEBB74745DBFBDF CRC64;
     MDPTLISLGA LALAGAAATV SGCAEDLESD VGSQSNPNSQ VQLGPQMGNI HRYFNKAISG
     EPVSYGLYVA VAGSVAWALI NAGLN