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DOK4 and DOK5: new Dok-related genes expressed in human T cells
C Favre1, A Gérard, E Clauzier
1U11 INSERM, Institut de Cancérologie et d'Immunologie de Marseille, Université de la Méditerranée, Marseille, France.
Abstract:
Dok proteins are adapter proteins involved in signal transduction. Several intracellular proteins expressed in lymphocytes meet the criteria of membrane-associated adapter proteins such as members of the Dok family. To understand the role and the formation of multiprotein networks involving Dok proteins in T lymphocytes, we search for potential additional members of this family. Here, we describe the two new human dok-related genes DOK4 and DOK5 and present data showing the expression of DOK4 and DOK5 genes in T cells. These genes are the orthologues of mouse Dok4 and Dok5 genes. Based on analysis of phylogenetic trees and exon/intron structure of Dok family members, DOK4 and DOK5 define a subfamily within dok genes distinct from DOK1, DOK2 and DOK3. So, Dok-4 and Dok-5 molecules constitute a new group of adapter proteins in T cells, requiring further functional analysis.
Insights
Researchers identified two new Dok-related genes, DOK4 and DOK5, in human T cells. These genes form a distinct subfamily of adapter proteins, expanding our understanding of T cell signaling networks.
Area of Science:
- Immunology
- Molecular Biology
- Cell Signaling
Background:
- Dok proteins are crucial adapter proteins in cellular signal transduction pathways.
- Members of the Dok family are expressed in lymphocytes and function as membrane-associated adapter proteins.
- Understanding multiprotein network formation involving Dok proteins in T lymphocytes is essential.
Purpose of the Study:
- To identify potential new members of the Dok protein family.
- To investigate the role and formation of multiprotein networks involving Dok proteins in T lymphocytes.
- To describe novel human dok-related genes and their expression in T cells.
Main Methods:
- Phylogenetic tree analysis of Dok family members.
- Exon/intron structure analysis of Dok genes.
- Gene expression analysis of DOK4 and DOK5 in T cells.
Main Results:
- Two new human dok-related genes, DOK4 and DOK5, were identified.
- DOK4 and DOK5 are orthologues of the mouse Dok4 and Dok5 genes.
- Phylogenetic and structural analyses reveal DOK4 and DOK5 form a distinct subfamily within dok genes, separate from DOK1, DOK2, and DOK3.
- DOK4 and DOK5 genes are expressed in T cells.
Conclusions:
- Dok-4 and Dok-5 molecules represent a new group of adapter proteins in T cells.
- These findings expand the known Dok protein family.
- Further functional analysis of Dok-4 and Dok-5 is required to elucidate their precise roles in T lymphocyte signaling.