DC-SIGN
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Location (UCSC) | Chr 19: 7.74 – 7.75 Mb | Chr 8: 3.9 – 3.9 Mb | |||||||
PubMed search | [3] | [4] |
View/Edit Human | View/Edit Mouse |
DC-SIGN (Dendritic Cell-Specific Intercellular adhesion molecule-3-Grabbing Non-integrin) also known as CD209 (Cluster of Differentiation 209) is a protein which in humans is encoded by the CD209 gene.[5]
DC-SIGN is a
Function
DC-SIGN is a C-type lectin and has a high affinity for the ICAM3 molecule.[7] It binds various microorganisms by recognizing high-mannose-containing glycoproteins on their surface, and can function as a co-receptor for several viruses such as HIV and Hepatitis C.[8][9][10] Binding to DC-SIGN can promote HIV and Hepatitis C virus to infect target cells (T-cells and hepatocytes, respectively).[9][10]
Besides functioning as an adhesion molecule, recent studies have also shown that DC-SIGN can initiate innate immunity by modulating toll-like receptors,[11] though the detailed mechanism is not yet known. DC-SIGN together with other C-type lectins is involved in recognition of tumors by dendritic cells. DC-SIGN is also a potential engineering target for dendritic cell based cancer vaccine.[12]
Clinical significance
HIV infection
This
Ebola infection
Different studies have demonstrated that the ebola virus infection process starts when the virus reaches the cellular DC-SIGN receptor to infect the dendritic cells (of the immune system). In 2015 European researchers designed a “giant” molecule formed by thirteen fullerenes covered by carbohydrates which, by blocking DC-SIGN receptor, are able to inhibit the cell infection by an artificial ebola virus model. These antiviral molecules decorated with specific carbohydrates (sugars) present affinity by the receptor used as an entry point to infect the cell and act blocking it, thus inhibiting the infection in a sub-nanomolar range.[14]
SARS-CoV-2
DC-sign and its counterpart L-SIGN (CD 209L) have also been identified as receptors facilitating the entry of Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) into human cells. Significant CD209L expression has been revealed in lung and kidney epithelia and endothelia and interactions with SARS-CoV-2 Spike protein (S protein) have been demonstrated in vitro.[15][16] CD209L also exhibits interaction with Angiotensin-converting enzyme-2 (ACE2), suggesting a potential role for CD209L-ACE2 heterodimerization in SARS-CoV-2 entry and infection in cell types expressing both proteins.[17] It is shown that DC/L-SIGN can enhance viral infection and dissemination by contributing to additional routes of infection mediated by the S protein in a process called trans-infection.[18] This process seems to be exclusive for DC/L-sign interaction. This complexity in the recognition patterns and functions of these receptors is similar to what has been observed in other viruses like HIV and ebola virus.
Gene family
DC-SIGN/CD209 is an animal "C-lectin", a large and diverse family of proteins found in both
A cluster of genes in both humans and mice contains three related members of the "DC Receptor" class, so named because of their homology to DC-SIGN. Of these,
References
- ^ a b c GRCh38: Ensembl release 89: ENSG00000090659 – Ensembl, May 2017
- ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000040197 – Ensembl, May 2017
- ^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
- ^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
- PMID 1518869.
- PMID 15653305.
- PMID 18458800.
- PMID 17502670.
- ^ PMID 15166245.
- ^ S2CID 15041781.
- PMID 18998127.
- PMID 16303292.
- PMID 22975871.
- PMID 27055288.
- PMID 33375175.
- PMID 32766577.
- PMID 34341769.
- PMID 34015061.
- PMID 16415006.
- PMID 18528403.
Further reading
- Geijtenbeek TB, Engering A, Van Kooyk Y (June 2002). "DC-SIGN, a C-type lectin on dendritic cells that unveils many aspects of dendritic cell biology". Journal of Leukocyte Biology. 71 (6): 921–931. S2CID 42418837.
- Baribaud F, Doms RW, Pöhlmann S (August 2002). "The role of DC-SIGN and DC-SIGNR in HIV and Ebola virus infection: can potential therapeutics block virus transmission and dissemination?". Expert Opinion on Therapeutic Targets. 6 (4): 423–431. S2CID 21541850.
- Bénichou S, Benmerah A (January 2003). "[The HIV nef and the Kaposi-sarcoma-associated virus K3/K5 proteins: "parasites"of the endocytosis pathway]". Médecine/Sciences. 19 (1): 100–106. PMID 12836198.
- van Kooyk Y, Geijtenbeek TB (September 2003). "DC-SIGN: escape mechanism for pathogens". Nature Reviews. Immunology. 3 (9): 697–709. S2CID 13547669.
- Turville S, Wilkinson J, Cameron P, Dable J, Cunningham AL (November 2003). "The role of dendritic cell C-type lectin receptors in HIV pathogenesis". Journal of Leukocyte Biology. 74 (5): 710–718. S2CID 44539239.
- Cambi A, Figdor CG (October 2003). "Dual function of C-type lectin-like receptors in the immune system". Current Opinion in Cell Biology. 15 (5): 539–546. PMID 14519388.
- Joseph AM, Kumar M, Mitra D (January 2005). "Nef: "necessary and enforcing factor" in HIV infection". Current HIV Research. 3 (1): 87–94. PMID 15638726.
- Stove V, Verhasselt B (January 2006). "Modelling thymic HIV-1 Nef effects". Current HIV Research. 4 (1): 57–64. PMID 16454711.
- Ortiz M, Kaessmann H, Zhang K, Bashirova A, Carrington M, Quintana-Murci L, Telenti A (September 2008). "The evolutionary history of the CD209 (DC-SIGN) family in humans and non-human primates". Genes and Immunity. 9 (6): 483–492. PMID 18528403.
- Becer CR, Gibson MI, Geng J, Ilyas R, Wallis R, Mitchell DA, Haddleton DM (November 2010). "High-affinity glycopolymer binding to human DC-SIGN and disruption of DC-SIGN interactions with HIV envelope glycoprotein". Journal of the American Chemical Society. 132 (43): 15130–15132. PMID 20932025.
External links
- DC-SIGN at the U.S. National Library of Medicine Medical Subject Headings (MeSH)
This article incorporates text from the United States National Library of Medicine, which is in the public domain.