Reviewed, UniProtKB/Swiss-Prot Q8TU02 (MTRB_METAC)

Names and origin

Protein names

Recommended name:
    Tetrahydromethanopterin S-methyltransferase subunit B
    EC=2.1.1.86
Alternative name(s):
    N5-methyltetrahydromethanopterin--coenzyme M methyltransferase subunit B

Gene names

Name:	mtrB
Ordered Locus Names:	MA_0273

Organism

Methanosarcina acetivorans [Complete proteome] [HAMAP]

Taxonomic identifier

2214 [NCBI]

Taxonomic lineage

Archaea › Euryarchaeota › Methanomicrobia › Methanosarcinales › Methanosarcinaceae › Methanosarcina

Protein attributes

Sequence length	108 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is not processed.
Protein existence	Inferred from homology.

General annotation (Comments)

Function	Part of a complex that catalyzes the formation of methyl-coenzyme M and tetrahydromethanopterin from coenzyme M and methyl-tetrahydromethanopterin. This is an energy-conserving, sodium-ion translocating step By similarity.
Catalytic activity	5-methyl-5,6,7,8-tetrahydromethanopterin + 2-mercaptoethanesulfonate = 5,6,7,8-tetrahydromethanopterin + 2-(methylthio)ethanesulfonate. HAMAP MF_01094
Pathway	One-carbon metabolism; methanogenesis from carbone dioxide; methyl-CoM from 5,10-methylene-H(4)MPT: step 2/2. HAMAP MF_01094
Subunit structure	The complex is composed of 8 subunits; mtrA, mtrB, mtrC, mtrD, mtrE, mtrF, mtrG and mtrH By similarity.
Subcellular location	Cell membrane; Single-pass membrane protein Potential.
Sequence similarities	Belongs to the mtrB family.

Ontologies

Keywords
Biological process	Methanogenesis One-carbon metabolism
Cellular component	Cell membrane Membrane
Domain	Transmembrane
Molecular function	Methyltransferase Transferase
Technical term	Complete proteome
Gene Ontology (GO)
Biological process	methanogenesis Inferred from electronic annotation. Source: UniProtKB-KW
Cellular component	integral to membrane Inferred from electronic annotation. Source: UniProtKB-KW plasma membrane Inferred from electronic annotation. Source: UniProtKB-SubCell
Molecular function	tetrahydromethanopterin S-methyltransferase activity Inferred from electronic annotation. Source: HAMAP
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 108	108	Tetrahydromethanopterin S-methyltransferase subunit B HAMAP MF_01094		PRO_0000147512
Regions
	Transmembrane	80 – 100	21	Potential

Sequences

	Sequence		Length	Mass (Da)
	Q8TU02-1 [UniParc]. Last modified June 1, 2002. Version 1. Checksum: C9007D9B5F296534	FASTA	108	11,909
	10 20 30 40 50 60 MSMIRIAPEV HLVMDPDTAV VAEEREDSIL YSMDPVFERM DKLDGIAEDL LNSLSPSKPL 70 80 90 100 LNSWPGRENT SYMAGIYGNA FYGIVVGLAF SGLLALIIFI QRLIEGGM

References

[1]

"The genome of Methanosarcina acetivorans reveals extensive metabolic and physiological diversity." Galagan J.E., Nusbaum C., Roy A., Endrizzi M.G., Macdonald P., FitzHugh W., Calvo S., Engels R., Smirnov S., Atnoor D., Brown A., Allen N., Naylor J., Stange-Thomann N., DeArellano K., Johnson R., Linton L., McEwan P. , McKernan K., Talamas J., Tirrell A., Ye W., Zimmer A., Barber R.D., Cann I., Graham D.E., Grahame D.A., Guss A.M., Hedderich R., Ingram-Smith C., Kuettner H.C., Krzycki J.A., Leigh J.A., Li W., Liu J., Mukhopadhyay B., Reeve J.N., Smith K., Springer T.A., Umayam L.A., White O., White R.H., de Macario E.C., Ferry J.G., Jarrell K.F., Jing H., Macario A.J.L., Paulsen I.T., Pritchett M., Sowers K.R., Swanson R.V., Zinder S.H., Lander E., Metcalf W.W., Birren B. Genome Res. 12:532-542(2002) [PubMed: 11932238] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: ATCC 35395 / DSM 2834 / JCM 12185 / C2A.

Cross-references

Sequence databases
EMBLGenBankDDBJ	AE010299 Genomic DNA. Translation: AAM03726.1.
RefSeq	NP_615246.1.
3D structure databases
ModBase	Search...
Genome annotation databases
GeneID	1472165.
GenomeReviews	Gene locus MA_0273 in contig AE010299_GR.
KEGG	mac:MA0273.
NMPDR	fig|188937.1.peg.272.
Organism-specific databases
CMR	Search...
Phylogenomic databases
HOGENOM	Q8TU02.
OMA	Q8TU02. EMRKDIL.
Enzyme and pathway databases
BioCyc	MACE188937:MA0273-MON.
BRENDA	2.1.1.86. 275708.
Family and domain databases
HAMAP	MF_01094. [Tree]
InterPro	IPR008690. MtrB_MeTrfase. [Graphical view]
Pfam	PF05440. MtrB. 1 hit. [Graphical view]
ProDom	PD012565. MtrB_mtfrase. 1 hit. [Graphical view] [Entries sharing at least one domain]
ProtoNet	Search...

Entry information

Entry name

MTRB_METAC

Accession

Primary (citable) accession number: Q8TU02

Entry history

Integrated into UniProtKB/Swiss-Prot:	November 28, 2003
Last sequence update:	June 1, 2002
Last modified:	June 16, 2009
This is version 42 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

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