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3.C.1.1.1
Na+-transporting tetrahydromethanopterin S-methyltransferase (NMM), MtrABCDEFGH (Harms et al. 1995).  MtrA shows a short region of sequence similarity with MtrF; MtrB shows a shortregion of sezquence similarity with MtrG (all in their C-terminal TMSs). However, MtrC, D, E and H do not show noticable sequence similarity with other members of this system.

Accession Number:P80184
Protein Name:MtrA
Length:238
Molecular Weight:25617.00
Species:Methanobacterium thermoautotrophicum (strain Marburg / DSM 2133) [79929]
Number of TMSs:1
Location1 / Topology2 / Orientation3: Cell membrane1 / Single-pass membrane protein2
Substrate sodium(1+)

Cross database links:

Pfam: PF04208   

Gene Ontology

GO:0005737 C:cytoplasm
GO:0016021 C:integral to membrane
GO:0005886 C:plasma membrane
GO:0012506 C:vesicle membrane
GO:0030269 F:tetrahydromethanopterin S-methyltransferase...
GO:0015948 P:methanogenesis
GO:0006730 P:one-carbon metabolic process
GO:0006814 P:sodium ion transport

References (4)

[1] “Cloning, sequencing and immunological characterization of the corrinoid-containing subunit of the N5-methyltetrahydromethanopterin: coenzyme-M methyltransferase from Methanobacterium thermoautotrophicum.”  Stupperich E.et.al.   8223548
[2] “Purification and properties of N5-methyltetrahydromethanopterin:coenzyme M methyltransferase from Methanobacterium thermoautotrophicum.”  Gaertner P.et.al.   8477726
[3] “The energy conserving N5-methyltetrahydromethanopterin:coenzyme M methyltransferase complex from Methanobacterium thermoautotrophicum is composed of eight different subunits.”  Harms U.et.al.   7737157
[4] “Identification of the active site histidine in the corrinoid protein MtrA of the energy-conserving methyltransferase complex from Methanobacterium thermoautotrophicum.”  Harms U.et.al.   9461302

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence
1:	MVEKKSPAEG WPVVNGDYIV GDPESPVAAT TLASHIEDIP VEAGAAIAGP CKTENLGIEK 
61:	MIANLISNPN IRFLILCGSE VQGHITGQSI EALHQNGVDP DKRNIIGATG AIPYIENIPD 
121:	EGIERFQKQL EIVNLIDVED ADAIKAKVKE CIEKDPGAFE EEAMIIKVEE GGEEEEGEEV 
181:	KPVAPETALI EARMRNIQTQ VKMIGSTNRM FAGMYSGKVQ GIMIGLAFTL TLGILLLV