Reviewed, UniProtKB/Swiss-Prot Q58252 (MCRB_METJA)

Names and origin

Protein names

Recommended name:
    Methyl-coenzyme M reductase I subunit beta
      Short name=MCR I beta
    EC=2.8.4.1
Alternative name(s):
    Coenzyme-B sulfoethylthiotransferase beta

Gene names

Name:	mcrB
Ordered Locus Names:	MJ0842

Organism

Methanocaldococcus jannaschii (Methanococcus jannaschii) [Complete proteome] [HAMAP]

Taxonomic identifier

2190 [NCBI]

Taxonomic lineage

Archaea › Euryarchaeota › Methanococci › Methanococcales › Methanocaldococcaceae › Methanocaldococcus

Protein attributes

Sequence length	447 AA.
Sequence status	Complete.
Protein existence	Inferred from homology.

General annotation (Comments)

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

Ontologies

Keywords
Biological process	Methanogenesis
Molecular function	Transferase
Technical term	Complete proteome
Gene Ontology (GO)
Biological process	methanogenesis Inferred from electronic annotation. Source: UniProtKB-KW
Molecular function	coenzyme-B sulfoethylthiotransferase activity Inferred from electronic annotation. Source: EC
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 447	447	Methyl-coenzyme M reductase I subunit beta		PRO_0000147465

Sequences

	Sequence		Length	Mass (Da)
	Q58252-1 [UniParc]. Last modified December 15, 1998. Version 2. Checksum: 52C76BB2C4C425E7	FASTA	447	47,789
	10 20 30 40 50 60 MIPMVKYKDT INLYDEKGKL VEENVPLEAI SPLHNPTIQK LVKDVKRTVA VNLAGIENAL 70 80 90 100 110 120 RTGQVGGKGC MIKGRELDLP IVENAETIAE YVEKVVRVSE DDDTSIKLIN DGKQMAVQIP 130 140 150 160 170 180 SKRLDVAAEY SVSVLVTAQA LKEAIIRTFD VDIFDAPMVH AAVLGGYPHE VTMKGSNIAA 190 200 210 220 230 240 LLGSPLSLEG PGYALRNIMA NHFVACTKKN VMNAVAFAAI MEQTAMFEMG DAVGLFERLH 250 260 270 280 290 300 LLGLAYQGLN ADNLVIDLVK ANGKNGTVGT VVASVVERAL EDGVIKEDKT LPSGFKLYKP 310 320 330 340 350 360 VDVAKWNAYA AAGLVAAAIV NCGAARAAQN IASTILYYND ILEYETGLPG VDFGRAEGTA 370 380 390 400 410 420 VGFSFFSHSI YGGGGPGIFN GNHIVTRHSK GFAIPPVAAA MCLDAGTQMF SPERTSALVG 430 440 TVFSAIDEFR EPLKYVIKGA LEVKDKI

References

[1]

"Complete genome sequence of the methanogenic archaeon, Methanococcus jannaschii." Bult C.J., White O., Olsen G.J., Zhou L., Fleischmann R.D., Sutton G.G., Blake J.A., FitzGerald L.M., Clayton R.A., Gocayne J.D., Kerlavage A.R., Dougherty B.A., Tomb J.-F., Adams M.D., Reich C.I., Overbeek R., Kirkness E.F., Weinstock K.G. , Merrick J.M., Glodek A., Scott J.L., Geoghagen N.S.M., Weidman J.F., Fuhrmann J.L., Nguyen D., Utterback T.R., Kelley J.M., Peterson J.D., Sadow P.W., Hanna M.C., Cotton M.D., Roberts K.M., Hurst M.A., Kaine B.P., Borodovsky M., Klenk H.-P., Fraser C.M., Smith H.O., Woese C.R., Venter J.C. Science 273:1058-1073(1996) [PubMed: 8688087] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: ATCC 43067 / DSM 2661 / JAL-1 / JCM 10045 / NBRC 100440.

Cross-references

Sequence databases
EMBL GenBank DDBJ	L77117 Genomic DNA. Translation: AAB98847.1.
RefSeq	NP_247836.1.
3D structure databases
SMR	Q58252. Positions 6-447.
ModBase	Search...
Genome annotation databases
GeneID	1451730.
GenomeReviews	Gene locus MJ0842 in contig L77117_GR.
KEGG	mja:MJ0842.
NMPDR	fig|243232.1.peg.873.
TIGR	MJ0842.
Phylogenomic databases
HOGENOM	HBG538593.
OMA	GFAIPPV.
Enzyme and pathway databases
BRENDA	2.8.4.1. 256362.
Family and domain databases
InterPro	IPR008924. Me_CoM_Rdtase_asu/bsu_C. IPR003179. Me_CoM_Rdtase_bsu. IPR009024. Me_CoM_Rdtase_Fd-like_fold. [Graphical view]
Gene3D	G3DSA:1.20.840.10. MCR_a/b_chain_a-bundle. 2 hits.
Pfam	PF02241. MCR_beta. 1 hit. PF02783. MCR_beta_N. 1 hit. [Graphical view]
PIRSF	PIRSF000263. Meth_CoM_rd_beta. 1 hit.
TIGRFAMs	TIGR03257. met_CoM_red_bet. 1 hit.
ProtoNet	Search...

Entry information

Entry name

MCRB_METJA

Accession

Primary (citable) accession number: Q58252

Entry history

Integrated into UniProtKB/Swiss-Prot:	November 1, 1997
Last sequence update:	December 15, 1998
Last modified:	February 9, 2010
This is version 63 of the entry and version 2 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

HAMAP (High-quality Automated and Manual Annotation of microbial Proteomes)