Common gamma chain: Difference between revisions

Revision as of 16:26, 16 February 2025

Common Gamma Chain

File:Common gamma chain IL-7receptor and signaling.jpg

Diagram of the IL-7 receptor and signaling pathway involving the common gamma chain.

The common gamma chain (_c), also known as CD132, is a critical component of several cytokine receptors in the immune system. It is shared by the receptors for interleukins IL-2, IL-4, IL-7, IL-9, IL-15, and IL-21. The common gamma chain is essential for the signaling pathways that regulate the development, proliferation, and function of various immune cells.

Structure

The common gamma chain is a type I transmembrane protein that consists of an extracellular domain, a transmembrane domain, and a cytoplasmic domain. The extracellular domain is responsible for binding to the cytokine receptor complexes, while the cytoplasmic domain is involved in signal transduction.

Function

The common gamma chain is crucial for the function of several cytokine receptors:

IL-2 Receptor: The common gamma chain is part of the high-affinity IL-2 receptor complex, which is important for T cell proliferation and survival.
IL-4 Receptor: It is involved in the IL-4 receptor complex, which plays a role in B cell differentiation and IgE production.
IL-7 Receptor: The common gamma chain is essential for the IL-7 receptor, which is critical for T cell development in the thymus.
IL-9 Receptor: It participates in the IL-9 receptor complex, influencing the growth of T cells and mast cells.
IL-15 Receptor: The common gamma chain is part of the IL-15 receptor, which is important for the development and function of natural killer cells.
IL-21 Receptor: It is involved in the IL-21 receptor complex, which affects the function of T cells, B cells, and natural killer cells.

Signaling Pathways

The common gamma chain is involved in the activation of several signaling pathways, including the JAK-STAT pathway. Upon cytokine binding, the associated Janus kinases (JAKs) are activated, leading to the phosphorylation of STAT proteins, which then translocate to the nucleus to modulate gene expression.

Clinical Significance

Mutations in the gene encoding the common gamma chain, IL2RG, can lead to X-linked severe combined immunodeficiency (X-SCID), a condition characterized by a severely compromised immune system. Patients with X-SCID are highly susceptible to infections and require early intervention, such as bone marrow transplantation.

Related Pages

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-'''Common gamma chain''' (also known as '''γc''' or '''CD132''') is a type of [[protein]] that is encoded by the IL2RG gene in humans. It is a component of multiple [[cytokine receptor]] systems, including those of [[Interleukin 2|interleukin 2]], [[Interleukin 4|interleukin 4]], [[Interleukin 7|interleukin 7]], [[Interleukin 9|interleukin 9]], [[Interleukin 15|interleukin 15]], and [[Interleukin 21|interleukin 21]].
+== Common Gamma Chain ==
+[[File:Common_gamma_chain_IL-7receptor_and_signaling.jpg|thumb|right|Diagram of the IL-7 receptor and signaling pathway involving the common gamma chain.]]
+The '''common gamma chain''' (_c), also known as '''CD132''', is a critical component of several [[cytokine receptors]] in the [[immune system]]. It is shared by the receptors for interleukins [[IL-2]], [[IL-4]], [[IL-7]], [[IL-9]], [[IL-15]], and [[IL-21]]. The common gamma chain is essential for the signaling pathways that regulate the development, proliferation, and function of various immune cells.
+== Structure ==
+The common gamma chain is a type I [[transmembrane protein]] that consists of an extracellular domain, a transmembrane domain, and a cytoplasmic domain. The extracellular domain is responsible for binding to the cytokine receptor complexes, while the cytoplasmic domain is involved in signal transduction.
 == Function ==
-The common gamma chain is an important signaling component of many [[immune system]] [[receptor]]s and plays a crucial role in regulating [[immune response]]. It is involved in the development and function of [[T cell]]s, [[B cell]]s, [[Natural killer cell|NK cells]], and [[dendritic cell]]s.
+The common gamma chain is crucial for the function of several cytokine receptors:
+* '''IL-2 Receptor''': The common gamma chain is part of the high-affinity IL-2 receptor complex, which is important for T cell proliferation and survival.
+* '''IL-4 Receptor''': It is involved in the IL-4 receptor complex, which plays a role in B cell differentiation and [[IgE]] production.
+* '''IL-7 Receptor''': The common gamma chain is essential for the IL-7 receptor, which is critical for T cell development in the [[thymus]].
+* '''IL-9 Receptor''': It participates in the IL-9 receptor complex, influencing the growth of T cells and mast cells.
+* '''IL-15 Receptor''': The common gamma chain is part of the IL-15 receptor, which is important for the development and function of [[natural killer cells]].
+* '''IL-21 Receptor''': It is involved in the IL-21 receptor complex, which affects the function of T cells, B cells, and natural killer cells.
-== Clinical significance ==
+== Signaling Pathways ==
-Mutations in the IL2RG gene that encodes the common gamma chain can lead to [[X-linked severe combined immunodeficiency]] (X-SCID), a rare and potentially fatal disease. X-SCID is characterized by a lack of functional T cells and NK cells, and non-functional B cells, leading to severe [[immune deficiency]].
+The common gamma chain is involved in the activation of several signaling pathways, including the [[JAK-STAT pathway]]. Upon cytokine binding, the associated [[Janus kinases]] (JAKs) are activated, leading to the phosphorylation of [[STAT proteins]], which then translocate to the nucleus to modulate gene expression.
-== Research ==
+== Clinical Significance ==
-Research into the common gamma chain and its associated cytokine receptors has potential implications for the treatment of various [[immune disorders]], including [[autoimmune diseases]], [[allergies]], and [[cancer]].
+Mutations in the gene encoding the common gamma chain, [[IL2RG]], can lead to [[X-linked severe combined immunodeficiency]] (X-SCID), a condition characterized by a severely compromised immune system. Patients with X-SCID are highly susceptible to infections and require early intervention, such as [[bone marrow transplantation]].
-== See also ==
+== Related Pages ==
-* [[Interleukin receptor]]
+* [[Cytokine receptor]]
-* [[Cytokine]]
+* [[Interleukin]]
+* [[Immune system]]
 * [[X-linked severe combined immunodeficiency]]
+{{Immunology}}
+[[Category:Immunology]]
 [[Category:Proteins]]
-[[Category:Immunology]]
-[[Category:Genes]]
-{{protein-stub}}
-{{immunology-stub}}
-{{genetics-stub}}