Latest MAP Kinase news

GGA3 Functions as a Switch to Promote Met Receptor Recycling, Essential for Sustained ERK and Cell Migration

Parachoniak CA, Luo Y, Abella JV, Keen JH, Park M.
2011 June 13

Cells are dependent on correct sorting of activated receptor tyrosine kinases (RTKs) for the outcome of growth factor signaling. Upon activation, RTKs are coupled through the endocytic machinery for degradation or recycled to the cell surface. However, the molecular mechanisms governing RTK recycling are poorly understood. Here, we show that Golgi-localized gamma ear-containing Arf-binding...

Gene regulation by MAPK substrate competition

Kim Y, Andreu MJ, Lim B, Chung K, Terayama M, Jimenez G, Berg CA, Lu H, Shvartsm
2011 June 13

Developing tissues are patterned by coordinated activities of signaling systems, which can be integrated by a regulatory region of a gene that binds multiple transcription factors or by a transcription factor that is modified by multiple enzymes. Based on a combination of genetic and imaging experiments in the early Drosophila embryo, we describe a signal integration mechanism that cannot be...

Axon regeneration requires coordinate activation of p38 and JNK MAPK pathways

Nix P, Hisamoto N, Matsumoto K, Bastiani M.
2011 June 12

Signaling pathways essential for axon regeneration, but not for neuron development or function, are particularly well suited targets for therapeutic intervention. We find that the parallel PMK-3(p38) and KGB-1(JNK) MAPK pathways must be coordinately activated to promote axon regeneration. Axon regeneration fails if the activity of either pathway is absent. These two MAPKs are coregulated by the...

MPK-1 ERK Controls Membrane Organization in C. elegans Oogenesis via a Sex-Determination Module.

Arur S, Ohmachi M, Berkseth M, Nayak S, Hansen D, Zarkower D, Schedl T.
2011 May 16

Tissues that generate specialized cell types in a production line must coordinate developmental mechanisms with physiological demand, although how this occurs is largely unknown. In the Caenorhabditis elegans hermaphrodite, the developmental sex-determination cascade specifies gamete sex in the distal germline, while physiological sperm signaling activates MPK-1/ERK in the proximal germline to...

The role of JNK in the development of hepatocellular carcinoma

Das M, Garlick DS, Greiner DL, Davis RJ.
2011 May 14

The cJun NH(2)-terminal kinase (JNK) signal transduction pathway has been implicated in the growth of carcinogen-induced hepatocellular carcinoma. However, the mechanism that accounts for JNK-regulated tumor growth is unclear. Here we demonstrate that compound deficiency of the two ubiquitously expressed JNK isoforms (JNK1 and JNK2) in hepatocytes does not prevent hepatocellular carcinoma...

Elimination of oncogenic neighbors by JNK-mediated engulfment in Drosophila

Ohsawa S, Sugimura K, Takino K, Xu T, Miyawaki A, Igaki T.
2011 May 14

A newly emerged oncogenic cell in the epithelial population has to confront antitumor selective pressures in the host tissue. However, the mechanisms by which surrounding normal tissue exerts antitumor effects against oncogenically transformed cells are poorly understood. In Drosophila imaginal epithelia, clones of cells mutant for evolutionarily conserved tumor suppressor genes such as scrib or...

Transient activation of the HOG MAPK pathway regulates bimodal gene expression

Pelet S, Rudolf F, Nadal-Ribelles M, de Nadal E, Posas F, Peter M.
2011 May 05

Mitogen-activated protein kinase (MAPK) cascades are conserved signaling modules that control many cellular processes by integrating intra- and extracellular cues. The p38/Hog1 MAPK is transiently activated in response to osmotic stress, leading to rapid translocation into the nucleus and induction of a specific transcriptional program. When investigating the dynamic interplay between Hog1...

Mpk1 MAPK association with the Paf1 complex blocks Sen1-mediated premature transcription termination

Kim KY, Levin DE.
2011 May 03

The Mpk1 MAPK of the yeast cell wall integrity pathway uses a noncatalytic mechanism to activate transcription of stress-induced genes by recruitment of initiation factors to target promoters. We show here that Mpk1 additionally serves a function in transcription elongation that is also independent of its catalytic activity. This function is mediated by an interaction between Mpk1 and the Paf1...

ERK-MAPK drives lamellipodia protrusion by activating the WAVE2 regulatory complex.

Mendoza MC, Er EE, Zhang W, Ballif BA, Elliott HL, Danuser G, Blenis J.
2011 March 17

Cell movement begins with a leading edge protrusion, which is stabilized by nascent adhesions and retracted by mature adhesions. The ERK-MAPK (extracellular signal-regulated kinase-mitogen-activated protein kinase) localizes to protrusions and adhesions, but how it regulates motility is not understood. We demonstrate that ERK controls protrusion initiation and protrusion speed. Lamellipodial...

Microtubule depolymerization in Caenorhabditis elegans touch receptor neurons reduces gene expression through a p38 MAPK pathway

Bounoutas A, Kratz J, Emtage L, Ma C, Nguyen KC, Chalfie M.
2011 February 21

Microtubules are integral to neuronal development and function. They endow cells with polarity, shape, and structure, and their extensive surface area provides substrates for intracellular trafficking and scaffolds for signaling molecules. Consequently, microtubule polymerization dynamics affect not only structural features of the cell but also the subcellular localization of proteins that can...

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Latest MAP Kinase news

The Biochemistry, Biology and Pathology of MAP Kinases II, September 11-12, 2014, Vilnius, Lithuania

It`s our pleasure to invite you to the international event "The Biochemistry, Biology and Pathology of MAP Kinases II". The conference is organized by Enterprise Lithuania together with Swiss...

Next-Gen Kinase Inhibitors Conference - Cambridge Healthtech Institute, June 17 - 19, 2013

This established and well-recognized kinase conference addresses reoccurring questions about selectivity, safety, resistance and novelty. After many years of research and therapeutic developments of...

Control of the cell cycle progression by the MAPK Hog1

Eukaryotic cells coordinate various intracellular activities in response to environmental stresses, activating an adaptive program to maximize the probability of survival and proliferation. Cells...

Ultrasensitive MAPK/Erk activation in absence of protein synthesis in Xenopus oocytes

The mitogen-activated protein kinase (MAPK) cascade in Xenopus oocytes exhibits an all-or-none, ultrasensitive response, which is believed to result from a positive feed-back loop. Here we describe a...

Batsheva de Rothschild Seminar on Biochemistry, Biology and Pathology of MAP Kinases

This abstract book contains most of the abstracts presented to the Batsheva de Rothschild Seminar on Biochemistry, Biology and Pathology of MAP Kinases. An Aharon Katzir-Katchalski Meeting and an...

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