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MTRA1_METTM
ID   MTRA1_METTM             Reviewed;         238 AA.
AC   P80184; D9PY24;
DT   01-JUL-1993, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 3.
DT   03-AUG-2022, entry version 124.
DE   RecName: Full=Tetrahydromethanopterin S-methyltransferase subunit A 1 {ECO:0000255|HAMAP-Rule:MF_01093};
DE            EC=2.1.1.86 {ECO:0000255|HAMAP-Rule:MF_01093, ECO:0000269|PubMed:8477726};
DE   AltName: Full=N5-methyltetrahydromethanopterin--coenzyme M methyltransferase subunit A 1 {ECO:0000255|HAMAP-Rule:MF_01093};
GN   Name=mtrA1 {ECO:0000255|HAMAP-Rule:MF_01093};
GN   Synonyms=mtrA {ECO:0000303|PubMed:7737157}; OrderedLocusNames=MTBMA_c15430;
OS   Methanothermobacter marburgensis (strain ATCC BAA-927 / DSM 2133 / JCM
OS   14651 / NBRC 100331 / OCM 82 / Marburg) (Methanobacterium
OS   thermoautotrophicum).
OC   Archaea; Euryarchaeota; Methanomada group; Methanobacteria;
OC   Methanobacteriales; Methanobacteriaceae; Methanothermobacter.
OX   NCBI_TaxID=79929;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA], AND SUBCELLULAR LOCATION.
RC   STRAIN=ATCC BAA-927 / DSM 2133 / JCM 14651 / NBRC 100331 / OCM 82 /
RC   Marburg;
RX   PubMed=8223548; DOI=10.1111/j.1432-1033.1993.tb18225.x;
RA   Stupperich E., Juza A., Hoppert M., Mayer F.;
RT   "Cloning, sequencing and immunological characterization of the corrinoid-
RT   containing subunit of the N5-methyltetrahydromethanopterin: coenzyme-M
RT   methyltransferase from Methanobacterium thermoautotrophicum.";
RL   Eur. J. Biochem. 217:115-121(1993).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC BAA-927 / DSM 2133 / JCM 14651 / NBRC 100331 / OCM 82 /
RC   Marburg;
RX   PubMed=20802048; DOI=10.1128/jb.00844-10;
RA   Liesegang H., Kaster A.K., Wiezer A., Goenrich M., Wollherr A., Seedorf H.,
RA   Gottschalk G., Thauer R.K.;
RT   "Complete genome sequence of Methanothermobacter marburgensis, a
RT   methanoarchaeon model organism.";
RL   J. Bacteriol. 192:5850-5851(2010).
RN   [3]
RP   PROTEIN SEQUENCE OF 2-24, FUNCTION, CATALYTIC ACTIVITY, COFACTOR, AND
RP   BIOPHYSICOCHEMICAL PROPERTIES.
RC   STRAIN=ATCC BAA-927 / DSM 2133 / JCM 14651 / NBRC 100331 / OCM 82 /
RC   Marburg;
RX   PubMed=8477726; DOI=10.1111/j.1432-1033.1993.tb17792.x;
RA   Gaertner P., Ecker A., Fischer R., Linder D., Fuchs G., Thauer R.K.;
RT   "Purification and properties of N5-methyltetrahydromethanopterin:coenzyme M
RT   methyltransferase from Methanobacterium thermoautotrophicum.";
RL   Eur. J. Biochem. 213:537-545(1993).
RN   [4]
RP   SUBUNIT, AND OPERON STRUCTURE.
RC   STRAIN=ATCC BAA-927 / DSM 2133 / JCM 14651 / NBRC 100331 / OCM 82 /
RC   Marburg;
RX   PubMed=7737157; DOI=10.1111/j.1432-1033.1995.0640m.x;
RA   Harms U., Weiss D.S., Gaertner P., Linder D., Thauer R.K.;
RT   "The energy conserving N5-methyltetrahydromethanopterin:coenzyme M
RT   methyltransferase complex from Methanobacterium thermoautotrophicum is
RT   composed of eight different subunits.";
RL   Eur. J. Biochem. 228:640-648(1995).
RN   [5]
RP   BINDING SITE HIS-84, AND MUTAGENESIS OF HIS-35; HIS-84 AND HIS-94.
RC   STRAIN=ATCC BAA-927 / DSM 2133 / JCM 14651 / NBRC 100331 / OCM 82 /
RC   Marburg;
RX   PubMed=9461302; DOI=10.1111/j.1432-1033.1997.00783.x;
RA   Harms U., Thauer R.K.;
RT   "Identification of the active site histidine in the corrinoid protein MtrA
RT   of the energy-conserving methyltransferase complex from Methanobacterium
RT   thermoautotrophicum.";
RL   Eur. J. Biochem. 250:783-788(1997).
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:0000255|HAMAP-Rule:MF_01093,
CC       ECO:0000269|PubMed:8477726}.
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; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_01093, ECO:0000269|PubMed:8477726};
CC   -!- COFACTOR:
CC       Name=5-hydroxybenzimidazolylcob(I)amide; Xref=ChEBI:CHEBI:60494;
CC         Evidence={ECO:0000269|PubMed:8477726};
CC       Note=Binds 1 5-hydroxybenzimidazolylcobamide group.;
CC   -!- BIOPHYSICOCHEMICAL PROPERTIES:
CC       Kinetic parameters:
CC         KM=260 uM for 5-methyl-5,6,7,8-tetrahydromethanopterin
CC         {ECO:0000269|PubMed:8477726};
CC         KM=60 uM for coenzyme M {ECO:0000269|PubMed:8477726};
CC         Vmax=11.6 umol/min/mg enzyme {ECO:0000269|PubMed:8477726};
CC         Note=From other experiments a much lower Km for 5-methyl-5,6,7,8-
CC         tetrahydromethanopterin is estimated. {ECO:0000269|PubMed:8477726};
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:0000255|HAMAP-Rule:MF_01093}.
CC   -!- SUBUNIT: The complex is composed of 8 subunits; MtrA, MtrB, MtrC, MtrD,
CC       MtrE, MtrF, MtrG and MtrH. {ECO:0000255|HAMAP-Rule:MF_01093,
CC       ECO:0000269|PubMed:7737157}.
CC   -!- SUBCELLULAR LOCATION: Cell membrane {ECO:0000255|HAMAP-Rule:MF_01093,
CC       ECO:0000269|PubMed:8223548}; Single-pass membrane protein
CC       {ECO:0000255|HAMAP-Rule:MF_01093, ECO:0000269|PubMed:8223548}.
CC   -!- INDUCTION: Part of the probable mtrEDCBAFGH operon.
CC       {ECO:0000305|PubMed:7737157}.
CC   -!- SIMILARITY: Belongs to the MtrA family. {ECO:0000255|HAMAP-
CC       Rule:MF_01093}.
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DR   EMBL; X73123; -; NOT_ANNOTATED_CDS; Genomic_DNA.
DR   EMBL; CP001710; ADL59122.1; -; Genomic_DNA.
DR   RefSeq; WP_013296332.1; NC_014408.1.
DR   AlphaFoldDB; P80184; -.
DR   SMR; P80184; -.
DR   STRING; 79929.MTBMA_c15430; -.
DR   TCDB; 3.C.1.1.1; the na(+) transporting methyltetrahydromethanopterin:coenzyme m methyltransferase (nat-mmm) family.
DR   EnsemblBacteria; ADL59122; ADL59122; MTBMA_c15430.
DR   GeneID; 9705252; -.
DR   KEGG; mmg:MTBMA_c15430; -.
DR   PATRIC; fig|79929.8.peg.1496; -.
DR   HOGENOM; CLU_100863_0_0_2; -.
DR   OMA; EVKGHIT; -.
DR   OrthoDB; 89197at2157; -.
DR   UniPathway; UPA00640; UER00698.
DR   Proteomes; UP000000345; Chromosome.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0034708; C:methyltransferase complex; IDA:UniProtKB.
DR   GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0050897; F:cobalt ion binding; IEA:InterPro.
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   GO; GO:0006814; P:sodium ion transport; IEA:InterPro.
DR   HAMAP; MF_01093; MtrA; 1.
DR   InterPro; IPR013347; MeTrfase_F_su.
DR   InterPro; IPR030688; MeTrfase_MtrA/MtxA.
DR   InterPro; IPR005778; MtrA.
DR   Pfam; PF04208; MtrA; 1.
DR   Pfam; PF09472; MtrF; 1.
DR   PIRSF; PIRSF500207; MtrA; 1.
DR   PIRSF; PIRSF009452; MtrA_MtxA; 1.
DR   TIGRFAMs; TIGR01111; mtrA; 1.
PE   1: Evidence at protein level;
KW   Cell membrane; Cobalt; Direct protein sequencing; Membrane; Methanogenesis;
KW   Methyltransferase; One-carbon metabolism; Transferase; Transmembrane;
KW   Transmembrane helix.
FT   INIT_MET        1
FT                   /note="Removed"
FT                   /evidence="ECO:0000269|PubMed:8477726"
FT   CHAIN           2..238
FT                   /note="Tetrahydromethanopterin S-methyltransferase subunit
FT                   A 1"
FT                   /id="PRO_0000147508"
FT   TOPO_DOM        2..218
FT                   /note="Cytoplasmic"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01093"
FT   TRANSMEM        219..237
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01093"
FT   TOPO_DOM        238
FT                   /note="Extracellular"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01093"
FT   BINDING         84
FT                   /ligand="5-hydroxybenzimidazolylcob(I)amide"
FT                   /ligand_id="ChEBI:CHEBI:60494"
FT                   /ligand_note="cofactor"
FT                   /evidence="ECO:0000305"
FT   MUTAGEN         35
FT                   /note="H->K: No change in cofactor binding. No change in
FT                   cofactor binding; when associated with K-94."
FT                   /evidence="ECO:0000269|PubMed:9461302"
FT   MUTAGEN         84
FT                   /note="H->G,N,S: Abolishes cofactor binding."
FT                   /evidence="ECO:0000269|PubMed:9461302"
FT   MUTAGEN         94
FT                   /note="H->K: No change in cofactor binding; when associated
FT                   with K-35."
FT                   /evidence="ECO:0000269|PubMed:9461302"
SQ   SEQUENCE   238 AA;  25617 MW;  7FB17A14112A3463 CRC64;
     MVEKKSPAEG WPVVNGDYIV GDPESPVAAT TLASHIEDIP VEAGAAIAGP CKTENLGIEK
     MIANLISNPN IRFLILCGSE VQGHITGQSI EALHQNGVDP DKRNIIGATG AIPYIENIPD
     EGIERFQKQL EIVNLIDVED ADAIKAKVKE CIEKDPGAFE EEAMIIKVEE GGEEEEGEEV
     KPVAPETALI EARMRNIQTQ VKMIGSTNRM FAGMYSGKVQ GIMIGLAFTL TLGILLLV
 
 
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