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Image of CD4 co-receptor binding to MHC (Major Histocompatibility Complex) non-polymorphic region. In molecular biology, CD4 (cluster of differentiation 4) is a glycoprotein that serves as a co-receptor for the T-cell receptor (TCR). CD4 is found on the surface of immune cells such as helper T cells, monocytes, macrophages, and dendritic cells.
C-C chemokine receptor type 5, also known as CCR5 or CD195, is a protein on the surface of white blood cells that is involved in the immune system as it acts as a receptor for chemokines. [ 5 ] In humans, the CCR5 gene that encodes the CCR5 protein is located on the short (p) arm at position 21 on chromosome 3 .
CD4 immunoadhesin was first developed in the mid-1990s as a potential therapeutic agent and treatment for HIV/AIDS. The protein is a fusion of the extracellular domain of the CD4 receptor and the Fc domain of human immunoglobulin G (IgG), the most abundant antibody isotype in the human body. [1]
The Cyclin D/Cdk4 complex is a multi-protein structure consisting of the proteins Cyclin D and cyclin-dependent kinase 4, or Cdk4, a serine-threonine kinase.This complex is one of many cyclin/cyclin-dependent kinase complexes that are the "hearts of the cell-cycle control system" [1] and govern the cell cycle and its progression.
In general, CD45 acts to promote the active form of LCK by dephosphorylating a tyrosine (Y192) in its inhibitory C-terminal tail. The consequent trans-autophosphorylation of the tyrosine in the lck activation loop (Y394), stabilizes its active form promoting its open conformation [19] which further enhances the kinase activity and substrate ...
The CDK4 gene is located on chromosome 12 in humans. [7] The gene is composed of 4,583 base pairs which together code for the 303 amino acid protein with a molecular mass of 33,730 Da. [7] [8] All CDK proteins, including CDK4, have two lobes: the smaller N-terminal lobe (which contains an inhibitory G-loop), and the C terminal lobe (which contains an activation domain and a T-loop).
Cyclins have no enzymatic activity themselves, but they become active once they bind to CDKs. Without cyclin, CDK is less active than in the cyclin-CDK heterodimer complex. [5] [6] CDKs phosphorylate proteins on serine (S) or threonine (T) residues. The specificity of CDKs for their substrates is defined by the S/T-P-X-K/R sequence, where S/T ...
CD-4 or CD4 may refer to: CD4, a cell surface molecule present on leukocytes; CD4 + cells, a type of T cell; Color Developing Agent 4, a developing agent for color film; Compatible Discrete 4, a quadraphonic phonograph record format developed by JVC; Ford CD4 platform