Phosphatidylinositol 4-kinase is a component of glucose transporter (GLUT 4)-containing vesicles
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چکیده
منابع مشابه
Phosphatidylinositol 4-kinase is a component of glucose transporter (GLUT 4)-containing vesicles.
We recently developed a procedure for immunoisolating insulin-responsive membrane vesicles that contain the muscle/fat glucose transporter isoform, GLUT 4, from rat adipocytes. Utilizing this methodology, we are analyzing the components of these vesicles to gain an understanding of how they are regulated by insulin. In this report we identify a phosphatidylinositol (PtdIns) 4-kinase as a consti...
متن کاملPhosphatidylinositol 4-kinase, but not phosphatidylinositol 3-kinase, is present in GLUT4-containing vesicles isolated from rat skeletal muscle.
Insulin stimulates the rate of glucose transport into muscle and adipose cells by translocation of glucose transporter (GLUT4)-containing vesicles from an intracellular storage pool to the surface membrane. This event is mediated through the insulin receptor substrates (IRSs), which in turn activate phosphatidylinositol (PI) 3-kinase isoforms. It has been suggested that insulin causes attachmen...
متن کاملTargeting of the insulin-regulatable glucose transporter (GLUT-4).
668 A family of facilitative glucose transporters (GLUTS 1-7) has recently been identified in mammals [ 11. It is of key interest to determine the unique function of each GLUT isoform in an effort to broaden our understanding of whole body glucose homeostasis. An isoform of relevance to the regulation of glucose metabolism by insulin is GLUT-4. The expression of this isoform is confined to tiss...
متن کاملPhosphatidylinositol 4-kinase type IIalpha is responsible for the phosphatidylinositol 4-kinase activity associated with synaptic vesicles.
Phosphorylation of inositol phospholipids plays a key role in cellular regulation via the generation of intracellular second messengers. In addition, it represents a mechanism to regulate interactions of the lipid bilayer with proteins and protein scaffolds involved in vesicle budding, cytoskeletal organization, and signaling. Generation of phosphatidylinositol 4-phosphate [PI(4)P] from phospha...
متن کاملInsulin-mediated translocation of GLUT-4-containing vesicles is preserved in denervated muscles.
Skeletal muscle denervation decreases insulin-sensitive glucose uptake into this tissue as a result of marked GLUT-4 protein downregulation ( approximately 20% of controls). The process of insulin-stimulated glucose transport in muscle requires the movement or translocation of intracellular GLUT-4-rich vesicles to the cell surface, and it is accompanied by the translocation of several additiona...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1991
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(18)98835-6