Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: EC:2.7.11.11 (AMPK)
12,425 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Activities of many proteins including protein kinases are often regulated by their dynamic association with specific intracellular compartments. MAK-V is an AMPK-like protein kinase with poorly characterized functions and mechanisms of action. Similarly to many other protein kinases, association of MAK-V with specific intracellular compartments could be essential for its proper functions. In this work, we studied subcellular distribution of exogenously produced and endogenous MAK-V proteins in mammalian cells using biochemical cell fractioning aiming to supplement data on MAK-V intracellular localization studied by immunocytochemical methods. We found that a significant portion of MAK-V protein in mammalian cells is associated with membranes. Moreover, MAK-V expressed in yeast was also targeted to membrane, thus suggesting an evolutionarily conservative mechanism of MAK-V membrane association. Based on the ability of various MAK-V deletion mutants to localize to membrane and comparison of MAK-V amino acid sequences from different species, we suggest a possible mechanism governing MAK-V association with intracellular membranes.
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PMID:Membrane localization of the MAK-V protein kinase. 1839 62

MAK-V/Hunk is a scantily characterized AMPK-like protein kinase. Recent findings identified MAK-V as a pro-survival and anti-apoptotic protein and revealed its role in embryonic development as well as in tumorigenesis and metastasis. However molecular mechanisms of MAK-V action and regulation of its activity remain largely unknown. We identified Nedd4 as an interaction partner for MAK-V protein kinase. However, this HECT-type E3 ubiquitin ligase is not involved in the control of MAK-V degradation by the ubiquitin-proteasome system that regulates MAK-V abundance in cells. However, Nedd4 in an ubiquitin ligase-independent manner rescued developmental defects in Xenopus embryos induced by MAK-V overexpression, suggesting physiological relevance of interaction between MAK-V and Nedd4. This identifies Nedd4 as the first known regulator of MAK-V function.
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PMID:Identification of Nedd4 E3 ubiquitin ligase as a binding partner and regulator of MAK-V protein kinase. 2274 72