Martin Turner | |
---|---|
Nationality | British |
Alma mater |
|
Scientific career | |
Fields | immunology, molecular biology |
Institutions |
|
Thesis | Regulation of cytokine gene expression (1990) |
Website | www |
Martin Turner is a molecular biologist and Immunologist and Head of the Immunology Programme at the Babraham Institute. His work has helped identify key molecular processes involved in the development of the immune system and its response to pathogens. His work has included research the fundamental mechanisms regulating gene expression by cells of the immune system.
Turner graduated in Biochemistry from University College London and went on to complete a PhD with Professor Sir Marc Feldmann studying the regulation of cytokine gene expression. Subsequently, he joined the MRC National Institute for Medical Research, working with Victor Tybulewicz before joining the Babraham Institute in 1997. Turner became Head of the Lymphocyte Signalling & Development Programme at the Institute in 2005. In 2021 this became the Immunology Programme.
During his PhD, Turner contributed to fundamental research that led to the identification of TNF as a potential drug target for the treatment of rheumatoid arthritis. [1] [2] [3] [4] [5]
He went on to work on identifying elements of signal transduction pathways that are needed inside cells to promote proper development of lymphocytes. [6] [7] [8] [9] His work has continued to focus in this area and has included identifying roles for phosphoinositide-3-kinase (PI3K) in lymphocyte development and activation. [10] [11] [12] [13] [14] [15] [16] [17] [18] This work has helped to underpin the development of PI3K delta inhibitors in treating human cancers.
Recent work by his group seeks to understand how RNA-processing mechanisms control the development and function of B and T lymphocytes. [19] [20] [21] In particular, Turner is interested in RNA-binding proteins [22] [23] [24] [25] [26] [27] [28] [29] [30] [31] [32] and microRNAs (particularly miR-155 [33] [34] [35] [36] [37] and how these function within signal transduction networks to control cell differentiation and immunity.
Immunoglobulin D (IgD) is an antibody isotype that makes up about 1% of proteins in the plasma membranes of immature B-lymphocytes where it is usually co-expressed with another cell surface antibody called IgM. IgD is also produced in a secreted form that is found in very small amounts in blood serum, representing 0.25% of immunoglobulins in serum. The relative molecular mass and half-life of secreted IgD is 185 kDa and 2.8 days, respectively. Secreted IgD is produced as a monomeric antibody with two heavy chains of the delta (δ) class, and two Ig light chains.
Perforin-1 Perforin (PRF), encoded by the PRF1 gene, is a pore-forming toxic protein housed in the secretory granules of cytotoxic T lymphocytes (CTLs) and natural killer (NK) cells. Together, these cells are known as cytotoxic lymphocytes (CLs).
In immunology, an Fc receptor is a protein found on the surface of certain cells – including, among others, B lymphocytes, follicular dendritic cells, natural killer cells, macrophages, neutrophils, eosinophils, basophils, human platelets, and mast cells – that contribute to the protective functions of the immune system. Its name is derived from its binding specificity for a part of an antibody known as the Fc region. Fc receptors bind to antibodies that are attached to infected cells or invading pathogens. Their activity stimulates phagocytic or cytotoxic cells to destroy microbes, or infected cells by antibody-mediated phagocytosis or antibody-dependent cell-mediated cytotoxicity. Some viruses such as flaviviruses use Fc receptors to help them infect cells, by a mechanism known as antibody-dependent enhancement of infection.
Tyrosin-protein kinase Lck is a 56 kDa protein that is found inside lymphocytes and encoded in the human by the LCK gene. The Lck is a member of Src kinase family (SFK) and is important for the activation of T-cell receptor (TCR) signaling in both naive T cells and effector T cells. The role of Lck is less prominent in the activation or in the maintenance of memory CD8 T cells in comparison to CD4 T cells. In addition, the constitutive activity of the mouse Lck homolog varies among memory T cell subsets. It seems that in mice, in the effector memory T cell (TEM) population, more than 50% of Lck is present in a constitutively active conformation, whereas less than 20% of Lck is present as active form in central memory T cells. These differences are due to differential regulation by SH2 domain–containing phosphatase-1 (Shp-1) and C-terminal Src kinase.
Phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit delta isoform also known as phosphoinositide 3-kinase (PI3K) delta isoform or p110δ is an enzyme that in humans is encoded by the PIK3CD gene.
CD28 is a protein expressed on T cells that provides essential co-stimulatory signals required for T cell activation and survival. When T cells are stimulated through CD28 in conjunction with the T-cell receptor (TCR), it enhances the production of various interleukins, particularly IL-6. CD28 serves as a receptor for CD80 (B7.1) and CD86 (B7.2), proteins found on antigen-presenting cells (APCs).
ZAP-70 is a protein normally expressed near the surface membrane of lymphocytes. It is most prominently known to be recruited upon antigen binding to the T cell receptor (TCR), and it plays a critical role in T cell signaling.
Interleukin-15 (IL-15) is a protein that in humans is encoded by the IL15 gene. IL-15 is an inflammatory cytokine with structural similarity to Interleukin-2 (IL-2). Like IL-2, IL-15 binds to and signals through a complex composed of IL-2/IL-15 receptor beta chain (CD122) and the common gamma chain. IL-15 is secreted by mononuclear phagocytes following infection by virus(es). This cytokine induces the proliferation of natural killer cells, i.e. cells of the innate immune system whose principal role is to kill virally infected cells.
Interleukin-22 (IL-22) is a protein that in humans is encoded by the IL22 gene.
CD58, or lymphocyte function-associated antigen 3 (LFA-3), is a cell adhesion molecule expressed on Antigen Presenting Cells (APCs), particularly macrophages, and other tissue cells.
Protein kinase C theta (PKC-θ) is an enzyme that in humans is encoded by the PRKCQ gene. PKC-θ, a member of serine/threonine kinases, is mainly expressed in hematopoietic cells with high levels in platelets and T lymphocytes, where plays a role in signal transduction. Different subpopulations of T cells vary in their requirements of PKC-θ, therefore PKC-θ is considered as a potential target for inhibitors in the context of immunotherapy.
Semaphorin-4D (SEMA4D) also known as Cluster of Differentiation 100 (CD100), is a protein of the semaphorin family that in humans is encoded by the SEMA4D gene.
Lymphocyte-specific protein 1 is a protein that in humans is encoded by the LSP1 gene.
DNA-binding protein RFX5 is a protein that in humans is encoded by the RFX5 gene.
CD6 is a human protein encoded by the CD6 gene.
Butyrate response factor 1 is a protein that in humans is encoded by the ZFP36L1 gene.
T-cell surface glycoprotein CD8 alpha chain, is a protein encoded by CD8A gene.
MiR-155 is a microRNA that in humans is encoded by the MIR155 host gene or MIR155HG. MiR-155 plays a role in various physiological and pathological processes. Exogenous molecular control in vivo of miR-155 expression may inhibit malignant growth, viral infections, and enhance the progression of cardiovascular diseases.
NKG2D is an activating receptor (transmembrane protein) belonging to the NKG2 family of C-type lectin-like receptors. NKG2D is encoded by KLRK1 (killer cell lectin like receptor K1) gene which is located in the NK-gene complex (NKC) situated on chromosome 6 in mice and chromosome 12 in humans. In mice, it is expressed by NK cells, NK1.1+ T cells, γδ T cells, activated CD8+ αβ T cells and activated macrophages. In humans, it is expressed by NK cells, γδ T cells and CD8+ αβ T cells. NKG2D recognizes induced-self proteins from MIC and RAET1/ULBP families which appear on the surface of stressed, malignant transformed, and infected cells.
CD94/NKG2 is a family of C-type lectin receptors which are expressed predominantly on the surface of NK cells and a subset of CD8+ T-lymphocyte. These receptors stimulate or inhibit cytotoxic activity of NK cells, therefore they are divided into activating and inhibitory receptors according to their function. CD94/NKG2 recognize nonclassical MHC glycoproteins class I (HLA-E in human and Qa-1 molecules in the mouse).