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Reviewed, UniProtKB/Swiss-Prot P07955 (MCRB_METBF)

Last modified November 3, 2009. Version 75. Feed History...

Clusters with 100%, 90%, 50% identity | Documents (2) | Third-party data | Customize display text xml rdf/xml gff fasta
Names and origin · Protein attributes · General annotation (Comments) · Ontologies · Sequence annotation (Features) · Sequences · References · Cross-references · Entry information · Relevant documents

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Names and origin

Protein namesRecommended name:
    Methyl-coenzyme M reductase subunit beta
    EC=2.8.4.1
Alternative name(s):
    Coenzyme-B sulfoethylthiotransferase beta
Gene names
Name: mcrB
Ordered Locus Names: Mbar_A0897
OrganismMethanosarcina barkeri (strain Fusaro / DSM 804) [Complete proteome] [HAMAP]
Taxonomic identifier269797 [NCBI]
Taxonomic lineageArchaea › Euryarchaeota › Methanomicrobia › Methanosarcinales › Methanosarcinaceae › Methanosarcina

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Protein attributes

Sequence length434 AA.
Sequence statusComplete.
Sequence processingThe displayed sequence is further processed into a mature form.
Protein existenceEvidence at protein level.

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General annotation (Comments)

Function

Reduction of methyl-coenzyme M (2-(methylthio) ethanesulfonic acid) with 7-mercaptoheptanoylthreonine phosphate to methane and an heterodisulfide.

Catalytic activity

2-(methylthio)ethanesulfonate (methyl-CoM) + N-(7-mercaptoheptanoyl)threonine 3-O-phosphate (coenzyme B) = CoM-S-S-CoB + methane.

Cofactor

Binds 2 coenzyme F430 noncovalently per hexamer. Coenzyme F430 is a yellow nickel porphinoid By similarity.

Pathway

One-carbon metabolism; methyl-coenzyme M reduction; methane from methyl-coenzyme M: step 1/1.

Subunit structure

Hexamer of two alpha, two beta, and two gamma chains.

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Ontologies

Keywords
   Biological processMethanogenesis
   Molecular functionTransferase
   Technical term3D-structure
Complete proteome
Gene Ontology (GO)
   Biological processmethanogenesis

Inferred from electronic annotation. Source: UniProtKB-KW

   Molecular functioncoenzyme-B sulfoethylthiotransferase activity

Inferred from electronic annotation. Source: EC

Complete GO annotation...

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Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifier

Molecule processing

Initiator methionine11Removed
Chain2 – 434433Methyl-coenzyme M reductase subunit beta
PRO_0000147462

Secondary structure

1 .......................................................................... 434
Helix Strand Turn

Details...

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Sequences

Sequence LengthMass (Da)Tools
P07955-1 [UniParc].

Last modified January 23, 2007. Version 3.
Checksum: A85044187FB78CB9

FASTA43445,421
        10         20         30         40         50         60 
MSDTVDIYDD RGKLLESNVD IMSLAPTRNA AIQSIIMDTK RSVAVNLAGI QGALASGKMG 

        70         80         90        100        110        120 
GKGRQILGRG LNYDIVGNAD AIAENVKKLV QVDEGDDTNV IKVKGGKSLL IQSPKSRIIA 

       130        140        150        160        170        180 
GADFMSATTV GAAAVTQTIM DMFGTDPYDA PIVKSAVWGS YPQTMDLMGG QVQGILSIPQ 

       190        200        210        220        230        240 
NNEGLGFSLR NIMANHVAAI SNRNAMNASA LSSIYEQSGI FEMGGAVGMF ERHQLLGLAY 

       250        260        270        280        290        300 
QGLNANNLLY DIVKENGKDG TIGTVIESVV RRAIEAGIIS VDKTAPSGYN FYKANDVPKW 

       310        320        330        340        350        360 
NACAAVGTLA ATLVNCGAGR AAQNVSSTLL YFNDILEKET GLPGCDYGKV EGTAVGFSFF 

       370        380        390        400        410        420 
SHSIYGGGGP GVFNGNHVVT RHSRGFAIPC VCAAVALDAG TQMFSIESTS GLIGDVFGAI 

       430 
PEFREPIKAV AGVL

« Hide

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References

« Hide 'large scale' references
[1]"Nucleotide sequence of the methyl coenzyme M reductase gene cluster from Methanosarcina barkeri."
Bokranz M., Klein A.
Nucleic Acids Res. 15:4350-4351(1987) [PubMed: 3502709] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA].
[2]"The Methanosarcina barkeri genome: comparative analysis with Methanosarcina acetivorans and Methanosarcina mazei reveals extensive rearrangement within methanosarcinal genomes."
Maeder D.L., Anderson I., Brettin T.S., Bruce D.C., Gilna P., Han C.S., Lapidus A., Metcalf W.W., Saunders E., Tapia R., Sowers K.R.
J. Bacteriol. 188:7922-7931(2006) [PubMed: 16980466] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
[3]"Comparison of three methyl-coenzyme M reductases from phylogenetically distant organisms: unusual amino acid modification, conservation and adaptation."
Grabarse W., Mahlert F., Shima S., Thauer R.K., Ermler U.
J. Mol. Biol. 303:329-344(2000) [PubMed: 11023796] [Abstract]
Cited for: X-RAY CRYSTALLOGRAPHY (1.6 ANGSTROMS).

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Cross-references

Sequence databases

Y00158 Genomic DNA. Translation: CAA68353.1.
CP000099 Genomic DNA. Translation: AAZ69871.1.
PIRA29525.
RefSeqYP_304451.1.

3D structure databases

EntryMethodResolution (Å)ChainPositionsPDBsum
1E6YX-ray1.60B/E2-434[»]
ModBaseSearch...

Protein-protein interaction databases

STRINGP07955.

Genome annotation databases

GeneID3625942.
GenomeReviewsGene locus Mbar_A0897 in contig CP000099_GR.
KEGGmba:Mbar_A0897.
NMPDRfig|269797.3.peg.458.

Organism-specific databases

CMRSearch...

Phylogenomic databases

HOGENOMP07955.
OMAGFAIPPV.

Enzyme and pathway databases

BioCycMBAR269797:MBAR_A0897-MON.

Family and domain databases

InterProIPR008924. Me_CoM_Rdtase_asu/bsu_C.
IPR003179. Me_CoM_Rdtase_bsu.
[Graphical view]
Gene3DG3DSA:1.20.840.10. MCR_a/b_chain_a-bundle. 2 hits.
PfamPF02241. MCR_beta. 1 hit.
PF02783. MCR_beta_N. 1 hit.
[Graphical view]
PIRSFPIRSF000263. Meth_CoM_rd_beta. 1 hit.
TIGRFAMsTIGR03257. met_CoM_red_bet. 1 hit.
ProtoNetSearch...

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Entry information

Entry nameMCRB_METBF
AccessionPrimary (citable) accession number: P07955
Secondary accession number(s): Q46E21
Entry history
Integrated into UniProtKB/Swiss-Prot: August 1, 1988
Last sequence update: January 23, 2007
Last modified: November 3, 2009
This is version 75 of the entry and version 3 of the sequence. [Complete history]
Entry statusReviewed (UniProtKB/Swiss-Prot)
Annotation projectHAMAP (High-quality Automated and Manual Annotation of microbial Proteomes)

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Relevant documents

PATHWAY comments

Index of metabolic and biosynthesis pathways

PDB cross-references

Index of Protein Data Bank (PDB) cross-references

Names and origin · Protein attributes · General annotation (Comments) · Ontologies · Sequence annotation (Features) · Sequences · References · Cross-references · Entry information · Relevant documents