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{{Infobox_gene}}
{{Infobox_gene}}


'''CD1D''' is the [[human]] [[gene]] that encodes the [[protein]] '''CD1d''',<ref name="P15813 CD1D_HUMAN">{{cite web|title=P15813 (CD1D_HUMAN)|url=http://www.uniprot.org/uniprot/P15813|publisher=Uniprot|accessdate=1 March 2013}}</ref> a member of the [[CD1]] (cluster of differentiation 1) family of [[glycoprotein]]s expressed on the surface of various human [[antigen-presenting cell]]s. They are non-classical MHC proteins, related to the [[class I MHC]] proteins, and are involved in the presentation of lipid [[antigens]] to [[T cells]]. CD1d is the only member of the group 2 CD1 molecules.
'''CD1D''' is the [[human]] [[gene]] that encodes the [[protein]] '''CD1d''',<ref name="P15813 CD1D_HUMAN">{{cite web|title=P15813 (CD1D_HUMAN)|url=https://www.uniprot.org/uniprot/P15813|publisher=Uniprot|accessdate=1 March 2013}}</ref> a member of the [[CD1]] (cluster of differentiation 1) family of [[glycoprotein]]s expressed on the surface of various human [[antigen-presenting cell]]s. They are non-classical MHC proteins, related to the [[class I MHC]] proteins, and are involved in the presentation of lipid [[antigens]] to [[T cells]]. CD1d is the only member of the group 2 CD1 molecules.


==Biological significance==
==Biological significance==
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==Ligands==
==Ligands==
Some of the known ligands for CD1d are:
Some of the known ligands for CD1d are:
* [[Fatty acid#Nomenclature|α]]-[[galactosylceramide]] (α-GalCer), a compound originally derived from the marine sponge ''[[Agelas]] mauritanius''<ref>{{cite journal|first=Richard W.|last=Franck|title=C-Galactosylceramide: Synthesis and Immunology|journal=C R Chim.|date=1 January 2012|volume= 15|number=1|pages=46–56|pmc=3293403|doi=10.1016/j.crci.2011.05.006|pmid=22408579}}</ref>  with no physiological role but great research utility.
* [[Fatty acid#Nomenclature|α]]-[[galactosylceramide]] (α-GalCer), a compound originally derived from the marine sponge ''[[Agelas]] mauritanius''<ref>{{cite journal|first=Richard W.|last=Franck|title=C-Galactosylceramide: Synthesis and Immunology|journal=Comptes Rendus Chimie|date=1 January 2012|volume= 15|number=1|pages=46–56|pmc=3293403|doi=10.1016/j.crci.2011.05.006|pmid=22408579}}</ref>  with no physiological role but great research utility.
* α-[[glucuronic acid|glucuronyl-]] and α-[[Galacturonic acid|galacturonyl-]] [[ceramides]], a family of compounds of microbial origin which can be found, for example, on the [[cell wall]] of ''[[Sphingomonas]]'', a ubiquitous [[Gram-negative]]  [[bacterium]].<ref>{{cite journal|last=Bendelac|first=A|author2=Savage PB|author3=Teyton I|title=The Biology of NKT Cells|journal=Annual Review of Immunology|doi=10.1146/annurev.immunol.25.022106.141711|pmid=  17150027|volume=25|year=2007|pages=297–336|issue=1}}<!--|accessdate=5 March 2013--></ref> The related β-D-[[glucose|glucopyranosyl]]ceramide is accumulated in [[antigen-presenting cells]] after infection, where it serves to activate [[invariant NKT]]s (iNKTs), a special kind of NKT.
* α-[[glucuronic acid|glucuronyl-]] and α-[[Galacturonic acid|galacturonyl-]] [[ceramides]], a family of compounds of microbial origin which can be found, for example, on the [[cell wall]] of ''[[Sphingomonas]]'', a ubiquitous [[Gram-negative]]  [[bacterium]].<ref>{{cite journal|last=Bendelac|first=A|author2=Savage PB|author3=Teyton I|title=The Biology of NKT Cells|journal=Annual Review of Immunology|doi=10.1146/annurev.immunol.25.022106.141711|pmid=  17150027|volume=25|year=2007|pages=297–336|issue=1}}<!--|accessdate=5 March 2013--></ref> The related β-D-[[glucose|glucopyranosyl]]ceramide is accumulated in [[antigen-presenting cells]] after infection, where it serves to activate [[invariant NKT]]s (iNKTs), a special kind of NKT.
* [[iGb3]], a self antigen which has been implied in iNKT selection.<ref>{{cite journal|last=Zhou|first=D|title=The immunological function of iGb3|journal=Current Protein & Peptide Science|date=August 2006|volume=7|issue=4|pages=325-33|pmid=16918447|doi=10.2174/138920306778018007}}</ref>
* [[iGb3]], a self antigen which has been implied in iNKT selection.<ref>{{cite journal|last=Zhou|first=D|title=The immunological function of iGb3|journal=Current Protein & Peptide Science|date=August 2006|volume=7|issue=4|pages=325–33|pmid=16918447|doi=10.2174/138920306778018007}}</ref>
* HS44, a synthetic amino [[cyclitol]]ic ceramide analogue which has less contact with the TCR, activating iNKTs in a more constrained way than α-GalCer (specially in relation to Th2 cytokines production) and thus being more interesting for therapeutic use.<ref>{{cite journal|author=J. Kerzerho|author2= E. Yu|author3=C. M. Barra|author4=E. Alari-Pahissa|author5=E. Girardi|author6=Y. Harrak|author7=P. Lauzurica|author8=A. Llebaria|author9=D. Zajonc|author10=O. Akbari|author11=A. R. Castaño|title=Structural and functional characterization of a novel non-glycosidic iNKT agonist with immunomodulatory properties|journal=Journal of Immunology|year=2012|volume= 188|pages= 2254–2265|pmid= 22301545|doi=10.4049/jimmunol.1103049|pmc=3288653}}</ref>
* HS44, a synthetic amino [[cyclitol]]ic ceramide analogue which has less contact with the TCR, activating iNKTs in a more constrained way than α-GalCer (specially in relation to Th2 cytokines production) and thus being more interesting for therapeutic use.<ref>{{cite journal|author=J. Kerzerho|author2= E. Yu|author3=C. M. Barra|author4=E. Alari-Pahissa|author5=E. Girardi|author6=Y. Harrak|author7=P. Lauzurica|author8=A. Llebaria|author9=D. Zajonc|author10=O. Akbari|author11=A. R. Castaño|title=Structural and functional characterization of a novel non-glycosidic iNKT agonist with immunomodulatory properties|journal=Journal of Immunology|year=2012|volume= 188|pages= 2254–2265|pmid= 22301545|doi=10.4049/jimmunol.1103049|pmc=3288653}}</ref>



Latest revision as of 06:55, 23 March 2018

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External IDsGeneCards: [1]
Orthologs
SpeciesHumanMouse
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RefSeq (protein)

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CD1D is the human gene that encodes the protein CD1d,[1] a member of the CD1 (cluster of differentiation 1) family of glycoproteins expressed on the surface of various human antigen-presenting cells. They are non-classical MHC proteins, related to the class I MHC proteins, and are involved in the presentation of lipid antigens to T cells. CD1d is the only member of the group 2 CD1 molecules.

Biological significance

CD1d-presented lipid antigens activate a special class of T cells, known as natural killer T (NKT) cells, through the interaction with the T-cell receptor present on NKT membranes.[1] When activated, NKT cells rapidly produce Th1 and Th2 cytokines, typically represented by interferon-gamma and interleukin 4 production.

Nomenclature

CD1d is also known as R3G1

Ligands

Some of the known ligands for CD1d are:

CD1d tetramers

CD1d tetramers are protein constructs composed of four CD1d molecules joined together and usually fluorescently labelled, used to identify NKT cells or other CD1d-reactive cells. In particular, type I NKT cells and some type II NKT cells are stained by them. A differentiation of these two types can be obtained in human by using an antibody against the TCR Vα24 chain, which is specific of type I NKT cells.[6]

Although they are the most widely used of CD1d oligomers, sometimes CD1d dimers (two units) or pentamers (five units) are used instead.[6]

References

  1. 1.0 1.1 "P15813 (CD1D_HUMAN)". Uniprot. Retrieved 1 March 2013.
  2. Franck, Richard W. (1 January 2012). "C-Galactosylceramide: Synthesis and Immunology". Comptes Rendus Chimie. 15 (1): 46–56. doi:10.1016/j.crci.2011.05.006. PMC 3293403. PMID 22408579.
  3. Bendelac, A; Savage PB; Teyton I (2007). "The Biology of NKT Cells". Annual Review of Immunology. 25 (1): 297–336. doi:10.1146/annurev.immunol.25.022106.141711. PMID 17150027.
  4. Zhou, D (August 2006). "The immunological function of iGb3". Current Protein & Peptide Science. 7 (4): 325–33. doi:10.2174/138920306778018007. PMID 16918447.
  5. J. Kerzerho; E. Yu; C. M. Barra; E. Alari-Pahissa; E. Girardi; Y. Harrak; P. Lauzurica; A. Llebaria; D. Zajonc; O. Akbari; A. R. Castaño (2012). "Structural and functional characterization of a novel non-glycosidic iNKT agonist with immunomodulatory properties". Journal of Immunology. 188: 2254–2265. doi:10.4049/jimmunol.1103049. PMC 3288653. PMID 22301545.
  6. 6.0 6.1 Terabe, Masaki; Berzofsky, Jay A. (2008). "The Role of NKT Cells in Tumor Immunity". Adv Cancer Res. 101: 277–348. doi:10.1016/S0065-230X(08)00408-9. PMC 2693255. PMID 19055947.

Further reading

External links