Dolichol-phosphate mannose (Dol-P-Man) serves as a donor of mannosyl residues on the lumenal side of the endoplasmic reticulum (ER). Lack of Dol-P-Man results in defective surface expression of GPI-anchored proteins. Dol-P-Man is synthesized from GDP-mannose and dolichol-phosphate on the cytosolic side of the ER by the enzyme dolichyl-phosphate mannosyltransferase. The protein encoded by this gene is a subunit of dolichyl-phosphate mannosyltransferase and acts as a stabilizer subunit of the dolichyl-phosphate mannosyltransferase complex. [provided by RefSeq, Jul 2008],
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Function:Stabilizer subunit of the dolichol-phosphate-mannose synthase complex.,online information:GlycoGene database,similarity:Belongs to the DPM3 family.,subunit:Composed of three subunits; DPM1, DPM2 and DPM3. Associated with DPM1 via its C-terminal domain and with DPM2 via its N-terminal portion.,