Investigation of the PtdIns(4,5)P2 dependence of plasma membrane receptor endocytosis in living cells

نویسندگان

  • Dániel Tóth
  • László Hunyady
  • Péter Várnai
چکیده

Background Phosphatidylinositol 4,5-bisphosphate (PtdIns(4,5)P2) plays an important role in various cellular processes: not only in calcium signalling as a precursor for the second messenger Ins(1,4,5)P3, but also in the regulation of ion channels, cytoskeletal dynamics and many other events connected to the plasma membrane. Since many of the molecules participating in the process of endocytosis can bind PtdIns(4,5)P2, a role of this lipid in the regulation of the internalization of plasma membrane receptors seemed possible.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Elimination of plasma membrane phosphatidylinositol (4,5)-bisphosphate is required for exocytosis from mast cells.

The inositol lipid phosphatidylinositol (4,5)-bisphosphate [PtdIns(4,5)P2] is involved in a myriad of cellular processes, including the regulation of exocytosis and endocytosis. In this paper, we address the role of PtdIns(4,5)P2 in compound exocytosis from rat peritoneal mast cells. This process involves granule-plasma membrane fusion as well as homotypic granule membrane fusion and occurs wit...

متن کامل

Phosphatidylinositol-4,5-bisphosphate-rich plasma membrane patches organize active zones of endocytosis and ruffling in cultured adipocytes.

A major regulator of endocytosis and cortical F-actin is thought to be phosphatidylinositol-4,5-bisphosphate [PtdIns(4,5)P2] present in plasma membranes. Here we report that in 3T3-L1 adipocytes, clathrin-coated membrane retrieval and dense concentrations of polymerized actin occur in restricted zones of high endocytic activity. Ultrafast-acquisition and superresolution deconvolution microscopy...

متن کامل

Dissecting the role of PtdIns(4,5)P2 in endocytosis and recycling of the transferrin receptor.

Endocytosis and recycling of membrane proteins are key processes for nutrient uptake, receptor signaling and synaptic transmission. Different steps in these fission and fusion cycles have been proposed to be regulated by physiological changes in plasma membrane (PM) phosphatidylinositol (4,5)-bisphosphate [PtdIns(4,5)P(2)] concentration. Here, we use a chemical enzyme-translocation strategy to ...

متن کامل

Emerging roles of PtdIns(4,5)P2--beyond the plasma membrane.

Phosphoinositides are a collection of lipid messengers that regulate most subcellular processes. Amongst the seven phosphoinositide species, the roles for phosphatidylinositol 4,5-bisphosphate [PtdIns(4,5)P2] at the plasma membrane, such as in endocytosis, exocytosis, actin polymerization and focal adhesion assembly, have been extensively studied. Recent studies have argued for the existence of...

متن کامل

Receptor-induced transient reduction in plasma membrane PtdIns(4,5)P2 concentration monitored in living cells

Although phosphatidylinositol 4,5-bisphosphate (PtdIns(4,5)P2) is a well-characterized precursor for the second messengers inositol 1,4,5-trisphosphate, diacylglycerol [1] and phosphatidylinositol 3,4,5-trisphosphate [2], it also interacts with the actin-binding proteins profilin and gelsolin [3], as well as with many signaling molecules that contain pleckstrin homology (PH) domains [4]. It is ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره 9  شماره 

صفحات  -

تاریخ انتشار 2009