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1.A.67.1.1
Magnesium transporter-1, MMgT1.  As of 2018, the function of this protein as a Mg2+ transporter was under debate (Schäffers et al. 2018).

Accession Number:Q8K273
Protein Name:Membrane magnesium transporter 1
Length:131
Molecular Weight:14677.00
Species: [10090]
Number of TMSs:2
Location1 / Topology2 / Orientation3: Endoplasmic reticulum membrane1 / Single-pass type I membrane protein2
Substrate magnesium(2+)

Cross database links:

RefSeq: NP_666346.1   
Entrez Gene ID: 236792   
Pfam: PF10270   
KEGG: mmu:236792   

Gene Ontology

GO:0031901 C:early endosome membrane
GO:0005789 C:endoplasmic reticulum membrane
GO:0000139 C:Golgi membrane
GO:0016021 C:integral to membrane
GO:0005886 C:plasma membrane
GO:0015087 F:cobalt ion transmembrane transporter activity
GO:0015093 F:ferrous iron transmembrane transporter acti...
GO:0015095 F:magnesium ion transmembrane transporter act...
GO:0006824 P:cobalt ion transport
GO:0006825 P:copper ion transport
GO:0015684 P:ferrous iron transport
GO:0015693 P:magnesium ion transport

References (3)

[1] “Identification and characterization of a novel family of membrane magnesium transporters, MMgT1 and MMgT2.”  Goytain A.et.al.   18057121
[2] “The transcriptional landscape of the mammalian genome.”  Carninci P.et.al.   16141072
[3] “The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC).”  The MGC Project Teamet.al.   15489334

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence 
1:	MAPSLWKGLV GVGLFALAHA AFSAAQHRSY MRLTEKEDES LPIDIVLQTL LAFAVTCYGI 
61:	VHIAGEFKDM DATSELKNKT FDTLRNHPSF YVFNHRGRVL FRPSDATNSS NLDALSSNTS 
121:	LKLRKFDSLR R