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© Research
Publication : The Journal of biological chemistry

Jamip1 (marlin-1) defines a family of proteins interacting with janus kinases and microtubules

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in The Journal of biological chemistry - 23 Jul 2004

Steindler C, Li Z, Algarté M, Alcover A, Libri V, Ragimbeau J, Pellegrini S

Link to Pubmed [PMID] – 15277531

J. Biol. Chem. 2004 Oct;279(41):43168-77

Jamip1 (Jak and microtubule interacting protein), an alias of Marlin-1, was identified for its ability to bind to the FERM (band 4.1 ezrin/radixin/moesin) homology domain of Tyk2, a member of the Janus kinase (Jak) family of non-receptor tyrosine kinases that are central elements of cytokine signaling cascades. Jamip1 belongs to a family of three genes conserved in vertebrates and is predominantly expressed in neural tissues and lymphoid organs. Jamip proteins lack known domains and are extremely rich in predicted coiled coils that mediate dimerization. In our initial characterization of Jamip1 (73 kDa), we found that it comprises an N-terminal region that targets the protein to microtubule polymers and, when overexpressed in fibroblasts, profoundly perturbs the microtubule network, inducing the formation of tight and stable bundles. Jamip1 was shown to associate with two Jak family members, Tyk2 and Jak1, in Jurkat T cells via its C-terminal region. The restricted expression of Jamip1 and its ability to associate to and modify microtubule polymers suggest a specialized function of these proteins in dynamic processes, e.g. cell polarization, segregation of signaling complexes, and vesicle traffic, some of which may involve Jak tyrosine kinases.

http://www.ncbi.nlm.nih.gov/pubmed/15277531