Publication Date:
2006-11-11
Description:
Many signaling, cytoskeletal, and transport proteins have to be localized to the plasma membrane (PM) in order to carry out their function. We surveyed PM-targeting mechanisms by imaging the subcellular localization of 125 fluorescent protein-conjugated Ras, Rab, Arf, and Rho proteins. Out of 48 proteins that were PM-localized, 37 contained clusters of positively charged amino acids. To test whether these polybasic clusters bind negatively charged phosphatidylinositol 4,5-bisphosphate [PI(4,5)P2] lipids, we developed a chemical phosphatase activation method to deplete PM PI(4,5)P2. Unexpectedly, proteins with polybasic clusters dissociated from the PM only when both PI(4,5)P2 and phosphatidylinositol 3,4,5-trisphosphate [PI(3,4,5)P3] were depleted, arguing that both lipid second messengers jointly regulate PM targeting.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3579512/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉 〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3579512/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Heo, Won Do -- Inoue, Takanari -- Park, Wei Sun -- Kim, Man Lyang -- Park, Byung Ouk -- Wandless, Thomas J -- Meyer, Tobias -- R01 GM030179/GM/NIGMS NIH HHS/ -- R01 GM030179-24A1/GM/NIGMS NIH HHS/ -- R01 GM030179-25/GM/NIGMS NIH HHS/ -- R01 GM063702/GM/NIGMS NIH HHS/ -- R01 MH064801/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 2006 Dec 1;314(5804):1458-61. Epub 2006 Nov 9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Pharmacology, 318 Campus Drive, Clark Building, Stanford University Medical School, Stanford, CA 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17095657" target="_blank"〉PubMed〈/a〉
Keywords:
ADP-Ribosylation Factors/chemistry/metabolism
;
Amino Acid Motifs
;
Amino Acid Sequence
;
Animals
;
Cell Membrane/*metabolism
;
GTP Phosphohydrolases/chemistry/*metabolism
;
HeLa Cells
;
Humans
;
Hydrophobic and Hydrophilic Interactions
;
Kinetics
;
Mice
;
Molecular Sequence Data
;
NIH 3T3 Cells
;
Phosphatidylinositol 4,5-Diphosphate/*metabolism
;
Phosphatidylinositol Phosphates/*metabolism
;
Second Messenger Systems
;
Signal Transduction
;
Static Electricity
;
rab GTP-Binding Proteins/chemistry/metabolism
;
ras Proteins/chemistry/metabolism
;
rho GTP-Binding Proteins/metabolism
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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