DPM1

DPM1
Identifiers
Aliases	DPM1, CDGIE, MPDS, dolichyl-phosphate mannosyltransferase polypeptide 1, catalytic subunit, dolichyl-phosphate mannosyltransferase subunit 1, catalytic
External IDs	OMIM: 603503; MGI: 1330239; HomoloGene: 2865; GeneCards: DPM1; OMA:DPM1 - orthologs
Gene location (Human) Chr. Chromosome 20 (human) Band 20q13.13 Start 50,934,867 bp End 50,959,140 bp
Gene location (Mouse) Chr. Chromosome 2 (mouse) Band 2|2 H3 Start 168,050,968 bp End 168,072,511 bp
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in epithelium of nasopharynx germinal epithelium sperm Skeletal muscle tissue of biceps brachii oral cavity skin of hip gums gingival epithelium amniotic fluid mucosa of pharynx Top expressed in spermatocyte spermatid yolk sac morula blastocyst right kidney muscle of thigh neural layer of retina embryo lip More reference expression data BioGPS More reference expression data
Gene ontology Molecular function transferase activity glycosyltransferase activity dolichyl-phosphate beta-D-mannosyltransferase activity protein binding dolichyl-phosphate-mannose-protein mannosyltransferase activity Cellular component endoplasmic reticulum membrane membrane endoplasmic reticulum dolichol-phosphate-mannose synthase complex nucleus Biological process protein O-linked mannosylation protein N-linked glycosylation via asparagine protein glycosylation GPI anchor biosynthetic process protein mannosylation dolichol metabolic process Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 8813 13480 Ensembl ENSG00000000419 ENSMUSG00000078919 UniProt O60762 O70152 RefSeq (mRNA) NM_003859 NM_001317034 NM_001317035 NM_001317036 NM_010072 NM_001310084 RefSeq (protein) NP_001303963 NP_001303964 NP_001303965 NP_003850 NP_001297013 NP_034202 Location (UCSC) Chr 20: 50.93 – 50.96 Mb Chr 2: 168.05 – 168.07 Mb PubMed search
Wikidata
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Dolichol-phosphate mannosyltransferase is an enzyme that in humans is encoded by the DPM1 gene.

Function

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. Human DPM1 lacks a carboxy-terminal transmembrane domain and signal sequence and is regulated by DPM2.

Model organisms

Model organisms have been used in the study of DPM1 function. A conditional knockout mouse line called Dpm1^{tm1b(KOMP)Wtsi} was generated at the Wellcome Trust Sanger Institute. Male and female animals underwent a standardized phenotypic screen to determine the effects of deletion. Additional screens performed: - In-depth immunological phenotyping

Dpm1 knockout mouse phenotype

Characteristic	Phenotype
All data available at.
Peripheral blood leukocytes 6 Weeks	Normal
Insulin	Normal
Haematology 6 Weeks	Normal
Homozygous viability at P14	Abnormal
Recessive lethal study	Abnormal
Body weight	Normal
Neurological assessment	Normal
Grip strength	Normal
Dysmorphology	Normal
Indirect calorimetry	Normal
Glucose tolerance test	Normal
Auditory brainstem response	Normal
DEXA	Normal
Radiography	Normal
Eye morphology	Normal
Clinical chemistry	Normal
Haematology 16 Weeks	Normal
Peripheral blood leukocytes 16 Weeks	Normal
Heart weight	Normal
Salmonella infection	Normal
Cytotoxic T Cell Function	Normal
Spleen Immunophenotyping	Normal
Mesenteric Lymph Node Immunophenotyping	Normal
Bone Marrow Immunophenotyping	Normal
Epidermal Immune Composition	Normal

Further reading

• Maeda Y, Tomita S, Watanabe R, Ohishi K, Kinoshita T (Sep 1998). "DPM2 regulates biosynthesis of dolichol phosphate-mannose in mammalian cells: correct subcellular localization and stabilization of DPM1, and binding of dolichol phosphate". The EMBO Journal. 17 (17): 4920–9. doi:10.1093/emboj/17.17.4920. PMC 1170821. PMID 9724629.
• Kim S, Westphal V, Srikrishna G, Mehta DP, Peterson S, Filiano J, Karnes PS, Patterson MC, Freeze HH (Jan 2000). "Dolichol phosphate mannose synthase (DPM1) mutations define congenital disorder of glycosylation Ie (CDG-Ie)". The Journal of Clinical Investigation. 105 (2): 191–8. doi:10.1172/JCI7302. PMC 377427. PMID 10642597.
• Imbach T, Schenk B, Schollen E, Burda P, Stutz A, Grunewald S, Bailie NM, King MD, Jaeken J, Matthijs G, Berger EG, Aebi M, Hennet T (Jan 2000). "Deficiency of dolichol-phosphate-mannose synthase-1 causes congenital disorder of glycosylation type Ie". The Journal of Clinical Investigation. 105 (2): 233–9. doi:10.1172/JCI8691. PMC 377434. PMID 10642602.
• Maeda Y, Tanaka S, Hino J, Kangawa K, Kinoshita T (Jun 2000). "Human dolichol-phosphate-mannose synthase consists of three subunits, DPM1, DPM2 and DPM3". The EMBO Journal. 19 (11): 2475–82. doi:10.1093/emboj/19.11.2475. PMC 212771. PMID 10835346.
• García-Silva MT, Matthijs G, Schollen E, Cabrera JC, Sanchez del Pozo J, Martí Herreros M, Simón R, Maties M, Martín Hernández E, Hennet T, Briones P (2005). "Congenital disorder of glycosylation (CDG) type Ie. A new patient". Journal of Inherited Metabolic Disease. 27 (5): 591–600. doi:10.1023/B:BOLI.0000042984.42433.d8. PMID 15669674. S2CID 5878710.
• Ashida H, Maeda Y, Kinoshita T (Jan 2006). "DPM1, the catalytic subunit of dolichol-phosphate mannose synthase, is tethered to and stabilized on the endoplasmic reticulum membrane by DPM3". The Journal of Biological Chemistry. 281 (2): 896–904. doi:10.1074/jbc.M511311200. PMID 16280320.
• Olsen JV, Blagoev B, Gnad F, Macek B, Kumar C, Mortensen P, Mann M (Nov 2006). "Global, in vivo, and site-specific phosphorylation dynamics in signaling networks". Cell. 127 (3): 635–48. doi:10.1016/j.cell.2006.09.026. PMID 17081983. S2CID 7827573.
• Ewing RM, Chu P, Elisma F, Li H, Taylor P, Climie S, McBroom-Cerajewski L, Robinson MD, O'Connor L, Li M, Taylor R, Dharsee M, Ho Y, Heilbut A, Moore L, Zhang S, Ornatsky O, Bukhman YV, Ethier M, Sheng Y, Vasilescu J, Abu-Farha M, Lambert JP, Duewel HS, Stewart II, Kuehl B, Hogue K, Colwill K, Gladwish K, Muskat B, Kinach R, Adams SL, Moran MF, Morin GB, Topaloglou T, Figeys D (2007). "Large-scale mapping of human protein-protein interactions by mass spectrometry". Molecular Systems Biology. 3 (1): 89. doi:10.1038/msb4100134. PMC 1847948. PMID 17353931.

External links

• GeneReviews/NCBI/NIH/UW entry on Congenital Disorders of Glycosylation Overview