CD3G

CD3G is a gene that encodes the gamma subunit of the CD3 complex, a group of proteins found on the surface of T cells. The CD3 complex plays a crucial role in T cell receptor signaling and T cell activation, making it a key player in the immune response.

Location of the CD3G gene on chromosome 11.

Structure

The CD3G gene is located on the short (p) arm of chromosome 11 at position 13. More precisely, the CD3G gene is located from base pair 117,714,022 to base pair 117,719,879 on chromosome 11. The CD3G protein is composed of 182 amino acids and has a molecular weight of approximately 20 kDa.

Function

The CD3G protein is part of the CD3 complex, which also includes CD3D, CD3E, and CD3Z. These proteins associate with the T cell receptor (TCR) to form the TCR-CD3 complex. This complex is essential for T cell development and function. The CD3G protein, along with the other components of the CD3 complex, plays a crucial role in TCR signaling. When the TCR binds to an antigen, the CD3 complex transmits a signal into the T cell that triggers a series of intracellular events leading to T cell activation.

Clinical significance

Mutations in the CD3G gene can lead to severe immune deficiencies. For example, a rare autosomal recessive disorder known as CD3G deficiency is caused by mutations in this gene. Patients with CD3G deficiency have a severely reduced number of T cells and suffer from recurrent infections.

Research

Research on CD3G and the CD3 complex is ongoing, with scientists investigating their roles in various diseases, including autoimmune diseases, cancer, and infectious diseases. Understanding the function of CD3G and the CD3 complex could lead to the development of new therapies for these diseases.

See also

• CD3 (immunology)
• T cell receptor
• Immune system
• Chromosome 11 (human)