ERGIC-53

LMAN1

LMAN1

Protein-coding gene in the species Homo sapiens

Protein ERGIC-53 also known as ER-Golgi intermediate compartment 53 kDa protein or lectin mannose-binding 1 is a protein that in humans is encoded by the LMAN1 gene.[5][6][7]

Quick Facts Available structures, PDB ...

Function

ERGIC-53 (also named LMAN1) is a type I integral membrane protein localized in the intermediate region (ERGIC) between the endoplasmic reticulum and the Golgi, presumably recycling between the two compartments. The protein is a mannose-specific lectin and is a member of a novel family of plant lectin homologs in the secretory pathway of animal cells. Mutations in the gene are associated with a coagulation defect. Using positional cloning, the gene was identified as the disease gene leading to combined deficiency of factor V-factor VIII, a rare, autosomal recessive disorder in which both coagulation factors V and VIII are diminished.[8][7] MCFD2 is the second gene that leads to combined deficiency of factor V-factor VIII.[9] ERGIC-53 and MCFD2 form a protein complex and serve as a cargo receptor to transport FV and FVIII from the ER to the ERGIC and then the Golgi,[10]as illustrated here.[8]

Clinical significance

LMAN1 mutational inactivation is a frequent and early event potentially contributing to colorectal tumorigenesis.[11]

References

  1. [1]
    GRCh38: Ensembl release 89: ENSG00000074695 – Ensembl, May 2017
  2. [2]
    GRCm38: Ensembl release 89: ENSMUSG00000041891 – Ensembl, May 2017
  3. [3]
    "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. [4]
    "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. [5]
    Nichols WC, Seligsohn U, Zivelin A, Terry VH, Hertel CE, Wheatley MA, Moussalli MJ, Hauri HP, Ciavarella N, Kaufman RJ, Ginsburg D (May 1998). "Mutations in the ER-Golgi intermediate compartment protein ERGIC-53 cause combined deficiency of coagulation factors V and VIII". Cell. 93 (1): 61–70. doi:10.1016/S0092-8674(00)81146-0. PMID 9546392. S2CID 15021770.
  6. [6]
    Arar C, Mignon C, Mattei M, Monsigny M, Roche A, Legrand A (Feb 1997). "Mapping of the MR60/ERGIC-53 gene to human chromosome 18q21.3-18q22 by in situ hybridization". Mamm Genome. 7 (10): 791–2. doi:10.1007/s003359900238. PMID 8854877. S2CID 19754504.
  7. [7]
    "Entrez Gene: LMAN1 lectin, mannose-binding, 1".
  8. [8]
    Khoriaty R, Vasievich MP, Ginsburg D (July 2012). "The COPII pathway and hematologic disease". Blood. 120 (1): 31–8. doi:10.1182/blood-2012-01-292086. PMC 3390960. PMID 22586181.
  9. [9]
    Zhang B, Cunningham MA, Nichols WC, Bernat JA, Seligsohn U, Pipe SW, McVey JH, Schulte-Overberg U, de Bosch NB, Ruiz-Saez A, White GC, Tuddenham EG, Kaufman RJ, Ginsburg D (May 2003). "Bleeding due to disruption of a cargo-specific ER-to-Golgi transport complex". Nat Genet. 34 (2): 220–5. doi:10.1038/ng1153. PMID 12717434. S2CID 19281158.
  10. [10]
    Zhang B, Kaufman RJ, Ginsburg D (2005). "LMAN1 and MCFD2 form a cargo receptor complex and interact with coagulation factor VIII in the early secretory pathway". J. Biol. Chem. 280 (27): 25881–6. doi:10.1074/jbc.M502160200. PMID 15886209.
  11. [11]
    Roeckel N, Woerner SM, Kloor M, Yuan YP, Patsos G, Gromes R, Kopitz J, Gebert J (January 2009). "High frequency of LMAN1 abnormalities in colorectal tumors with microsatellite instability". Cancer Res. 69 (1): 292–9. doi:10.1158/0008-5472.CAN-08-3314. PMID 19118014.

Further reading


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