Vav proteins, masters of the world of cytoskeleton organization

• Published in: Cellular Signalling Vol. 16; no. 1; pp. 1 - 11
• Main Authors: Hornstein, Idit, Alcover, Andres, Katzav, Shulamit
• Format: Book Review Journal Article
• Language: English
• Published: England Elsevier Inc 2004; Elsevier
• Subjects: Actin Cytoskeleton - metabolism; Actins; Actins - metabolism; Adaptive immunology; Animals; Cell Communication; Cell Communication - immunology; Cytoskeleton; Cytoskeleton - metabolism; GEF; GTP Phosphohydrolases; GTP Phosphohydrolases - metabolism; Guanine Nucleotide Exchange Factors; Guanine Nucleotide Exchange Factors - immunology; Guanine Nucleotide Exchange Factors - metabolism; Humans; Immunological synapse; Immunology; Life Sciences; Microfilaments; Oncogene Proteins; Oncogene Proteins - immunology; Oncogene Proteins - metabolism; Proto-Oncogene Proteins c-vav; Rac; Signal Transduction; Signal Transduction - immunology; Vav; Cytoskeleton; GEF; Vav; Immunological synapse; Rac
• ISSN: 0898-6568; 1873-3913
• DOI: 10.1016/S0898-6568(03)00110-4

Vav proteins are evolutionarily conserved from nematodes to mammals and play a pivotal role in many aspects of cellular signaling, coupling cell surface receptors to various effectors functions. In mammals, there are three family members; Vav1 is specifically expressed in the hematopoietic system, whereas Vav2 and Vav3 are more ubiquitously expressed. Vav proteins contain multiple domains that enable their function in various fashions. The participation of the Vav proteins in several processes that require cytoskeletal reorganization, such as the formation of the immunological synapse (IS), phagocytosis, platelet aggregation, spreading, and transformation will be discussed in this review. We will also cover how the Vav proteins succeed in controlling these processes by their function as guanine nucleotide exchange factors (GEFs) for the Rho/Rac family of GTPases. The contribution of the Vav proteins in a GEF-independent manner to the organization of the cytoskeleton will also be deliberated. The scope of this review is to highlight the numerous roles of the Vav signal transducer proteins in actin organization.