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== Function ==
== Function ==
The main function of membrane-bound CD83 is stabilization of [[MHC II|MHC II.]], [[Costimulation|costimulatory molecules]] and [[CD28]] in membrane by its transmembrane domain antagonistic activity to MARCH family [[E3 Ubiquitin Ligase|E3 ubiquitin ligases]]<ref>{{cite journal |last1=von Rohrscheidt |first1=Julia |last2=Petrozziello |first2=Elisabetta |last3=Nedjic |first3=Jelena |last4=Federle |first4=Christine |last5=Krzyzak |first5=Lena |last6=Ploegh |first6=Hidde L. |last7=Ishido |first7=Satoshi |last8=Steinkasserer |first8=Alexander |last9=Klein |first9=Ludger |title=Thymic CD4 T cell selection requires attenuation of March8-mediated MHCII turnover in cortical epithelial cells through CD83 |journal=Journal of Experimental Medicine |date=22 August 2016 |volume=213 |issue=9 |pages=1685–1694 |doi=10.1084/jem.20160316}}</ref>.
The main function of membrane-bound CD83 is stabilization of [[MHC II|MHC II.]], [[Costimulation|costimulatory molecules]] and [[CD28]] in membrane by its transmembrane domain antagonistic activity to MARCH family [[E3 Ubiquitin Ligase|E3 ubiquitin ligases]]<ref>{{cite journal |last1=Grosche |first1=Linda |last2=Knippertz |first2=Ilka |last3=König |first3=Christina |last4=Royzman |first4=Dmytro |last5=Wild |first5=Andreas B. |last6=Zinser |first6=Elisabeth |last7=Sticht |first7=Heinrich |last8=Muller |first8=Yves A. |last9=Steinkasserer |first9=Alexander |last10=Lechmann |first10=Matthias |title=The CD83 Molecule – An Important Immune Checkpoint |journal=Frontiers in Immunology |date=17 April 2020 |volume=11 |pages=721 |doi=10.3389/fimmu.2020.00721}}</ref><ref>{{cite journal |last1=von Rohrscheidt |first1=Julia |last2=Petrozziello |first2=Elisabetta |last3=Nedjic |first3=Jelena |last4=Federle |first4=Christine |last5=Krzyzak |first5=Lena |last6=Ploegh |first6=Hidde L. |last7=Ishido |first7=Satoshi |last8=Steinkasserer |first8=Alexander |last9=Klein |first9=Ludger |title=Thymic CD4 T cell selection requires attenuation of March8-mediated MHCII turnover in cortical epithelial cells through CD83 |journal=Journal of Experimental Medicine |date=22 August 2016 |volume=213 |issue=9 |pages=1685–1694 |doi=10.1084/jem.20160316}}</ref>.
=== Ligands ===
=== Ligands ===
It is not clear what ligands interact with CD83 but it looks like that membrane-bound CD83 homotypicaly interacts with soluble form may suggest [[Autocrine signaling|autocrine]] immune regulation. However, it contrasts with differences between the single expression of soluble CD83 on [[monocytes]] and membrane CD83 on activated DCs. Soluble CD83 also binds to [[CD153]] leading to supports Th2 T lymphocytes [[apoptosis]] by suppression of [[Bcl-2 inhibitor|BCL inhibitors]].
It is not clear what ligands interact with CD83 but it looks like that membrane-bound CD83 homotypicaly interacts with soluble form may suggest [[Autocrine signaling|autocrine]] immune regulation. However, it contrasts with differences between the single expression of soluble CD83 on [[monocytes]] and membrane CD83 on activated DCs. Soluble CD83 also binds to [[CD153]] leading to supports Th2 T lymphocytes [[apoptosis]] by suppression of [[Bcl-2 inhibitor|BCL inhibitors]].

Revision as of 06:40, 29 April 2021

CD83
Identifiers
AliasesCD83, BL11, HB15, CD83 molecule
External IDsOMIM: 604534; MGI: 1328316; HomoloGene: 3121; GeneCards: CD83; OMA:CD83 - orthologs
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

NM_004233
NM_001040280
NM_001251901

NM_001289915
NM_009856

RefSeq (protein)

NP_001035370
NP_001238830
NP_004224

NP_001276844
NP_033986

Location (UCSC)Chr 6: 14.12 – 14.14 MbChr 13: 43.94 – 43.96 Mb
PubMed search[3][4]
Wikidata
View/Edit HumanView/Edit Mouse

CD83 (Cluster of Differentiation 83) is a human protein encoded by the CD83 gene.[5]

Structure

CD83 is present as membrane-bound protein as same as soluble form. Extracellularly it is composed of V-type immunoglobulin like domain and in the case of membrane-bound form, it is also present as transmembrane domain and signaling cytoplasmic tail. Membrane-bound CD83 presumably forms trimers. Soluble CD83 is able to create dodecameric complexes.[6]

Gene

CD83 gene is localized in human chromosome 6p23 and in mice on chromosome 13. In humans, promoter is localized 261bp upstream obtains five NFκB and three IRFs binding sites showing the importance of CD83 during inflammation conditions[7] and moreover binding sites for AhR in promotor sequence as same as in enhancer sequence located 185bp downstream inside second intron[8] may suggesting negative regulation of transcription by exogenous stimulation like microbial metabolites in the gut.

Function

The main function of membrane-bound CD83 is stabilization of MHC II., costimulatory molecules and CD28 in membrane by its transmembrane domain antagonistic activity to MARCH family E3 ubiquitin ligases[9][10].

Ligands

It is not clear what ligands interact with CD83 but it looks like that membrane-bound CD83 homotypicaly interacts with soluble form may suggest autocrine immune regulation. However, it contrasts with differences between the single expression of soluble CD83 on monocytes and membrane CD83 on activated DCs. Soluble CD83 also binds to CD153 leading to supports Th2 T lymphocytes apoptosis by suppression of BCL inhibitors.

Positive selection

It was suggested that the thymocytes during positive selection could be aimed by CD83 expression on cortical thymic epithelial cells (cTECs). Double positive (DP) thymocytes inside specially differentiated cTECs called thymic nurse cells (TNCs) are tested to function of their αβTCR, where nonreactive TCR leads to thymocyte death by neglect. Successful rearrangement of reactive TCR supports surviving and conservation of just CD4 or CD8 expression on single positive (SP) thymocytes caused by recognition ability of MHC II. or MHC I. CD83 upregulates turnover of MHC II. on TNCs may enlarges population of CD4 SP thymocytes [11][12].

Regulatory T cells

T regulatory cells are present in two major populations as thymic induced and peripherialy induced Tregs. All Tregs express Foxp3 transcription factor estabilishs their suppressive phenotype. Foxp3 expression is not affected by CD83 in CD83 KO mouse. In contrast CD83 seems important for peripheral Tregs induction suggests by reduction of this population in CD83 KO showing proinflammatory phenotype. CD83 deficiency also shows disbalances in effectory function of Tregs as decreased expression of Th2 transcription factor GATA3 also important for ST2 production. Activated Tregs masively produce soluble CD83 leading to downregulation of IRAK-1 in infammed sites leading to TLR signalization down-regulation and switch inflammatory signals to tolerance establishment.

Dendritic cells

As said previously, CD83 stabilizes MHC II. on membrane by antagonistic activity of CD83 on MARCH E3 ubiquitin ligases. MARCH1 KO mouse revealeds accumulation of MHC II. on membrane causes reduced CD4+ T lymphocytes activation together with IL-12 production. On the other hand, CD83 KO with reduction of MHC II. and CD86 shows better response to bacterial infection and high production of IL-12 contrasting with WT mouse. CD83 seems to be important regulator of DCs phenotypes and MHC II. turnover by CD83 dependent endosome processing

B cells

CD83 expression correlates with rate of activation of B lymphocytes and it is under control of BCR, CD40, or TLRs activation similarly to other lymphocytes, where CD83 is expressed just after stimulation. CD83 KO shows up-regulated proliferation of B lymphocytes, suggesting that CD83 plays a role as a proliferation activated brake. CD83 does not affect affine maturation of antibodies, but its deficiency supports IgE class switch, suggesting importance of CD83 in allergy development and utilize it as therapeutic target in allergy treatment.

See also

References

  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000112149Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000015396Ensembl, May 2017
  3. ^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. ^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. ^ "Entrez Gene: CD83 CD83 molecule".
  6. ^ Berchtold S, Jones T, Mühl-Zürbes P, Sheer D, Schuler G, Steinkasserer A (March 1999). "The human dendritic cell marker CD83 maps to chromosome 6p23". Annals of Human Genetics. 63 (Pt 2): 181–3. doi:10.1046/j.1469-1809.1999.6320181.x. PMID 10738529.
  7. ^ Stein MF, Lang S, Winkler TH, Deinzer A, Erber S, Nettelbeck DM, et al. (April 2013). "Multiple interferon regulatory factor and NF-κB sites cooperate in mediating cell-type- and maturation-specific activation of the human CD83 promoter in dendritic cells". Molecular and Cellular Biology. 33 (7): 1331–44. doi:10.1128/MCB.01051-12. PMID 23339870.
  8. ^ Michalski J, Deinzer A, Stich L, Zinser E, Steinkasserer A, Knippertz I (July 2020). "Quercetin induces an immunoregulatory phenotype in maturing human dendritic cells". Immunobiology. 225 (4): 151929. doi:10.1016/j.imbio.2020.151929. PMID 32115260.
  9. ^ Grosche, Linda; Knippertz, Ilka; König, Christina; Royzman, Dmytro; Wild, Andreas B.; Zinser, Elisabeth; Sticht, Heinrich; Muller, Yves A.; Steinkasserer, Alexander; Lechmann, Matthias (17 April 2020). "The CD83 Molecule – An Important Immune Checkpoint". Frontiers in Immunology. 11: 721. doi:10.3389/fimmu.2020.00721.{{cite journal}}: CS1 maint: unflagged free DOI (link)
  10. ^ von Rohrscheidt, Julia; Petrozziello, Elisabetta; Nedjic, Jelena; Federle, Christine; Krzyzak, Lena; Ploegh, Hidde L.; Ishido, Satoshi; Steinkasserer, Alexander; Klein, Ludger (22 August 2016). "Thymic CD4 T cell selection requires attenuation of March8-mediated MHCII turnover in cortical epithelial cells through CD83". Journal of Experimental Medicine. 213 (9): 1685–1694. doi:10.1084/jem.20160316.
  11. ^ Kadouri, Noam; Nevo, Shir; Goldfarb, Yael; Abramson, Jakub (April 2020). "Thymic epithelial cell heterogeneity: TEC by TEC". Nature Reviews Immunology. 20 (4): 239–253. doi:10.1038/s41577-019-0238-0.
  12. ^ von Rohrscheidt, Julia; Petrozziello, Elisabetta; Nedjic, Jelena; Federle, Christine; Krzyzak, Lena; Ploegh, Hidde L.; Ishido, Satoshi; Steinkasserer, Alexander; Klein, Ludger (22 August 2016). "Thymic CD4 T cell selection requires attenuation of March8-mediated MHCII turnover in cortical epithelial cells through CD83". Journal of Experimental Medicine. 213 (9): 1685–1694. doi:10.1084/jem.20160316.

Further reading