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Clathrin-mediated endocytosis in AP-2–depleted cells
Open accessAbstract
We have used RNA interference to knock down the AP-2 μ2 subunit and clathrin heavy chain to undetectable levels in HeLaM cells. Clathrin-coated pits associated with the plasma membrane were still present in the AP-2–depleted cells, but they were 12-fold less abundant than in control cells. No clathrin-coated pits or vesicles could be detected in the clathrin-depleted cells, and post-Golgi membrane compartments were swollen. Receptor-mediated endocytosis of transferrin was severely inhibited in both clathrin- and AP-2–depleted cells. Endocytosis of EGF, and of an LDL receptor chimera, were also inhibited in the clathrin-depleted cells; however, both were internalized as efficiently in the AP-2–depleted cells as in control cells. These results indicate that AP-2 is not essential for clathrin-coated vesicle formation at the plasma membrane, but that it is one of several endocytic adaptors required for the uptake of certain cargo proteins including the transferrin receptor. Uptake of the EGF and LDL receptors may be facilitated by alternative adaptors.
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Cites
Curvature of clathrin-coated pits driven by epsin
Ford, M. G. J., Mills, I. G., Peter, B. J., Vallis, Y., Praefcke, G. J. K., Evans, P. R., & McMahon, H. T. (2002) · Nature · doi:10.1038/nature01020 · Cited by 1,019
Disabled‐2 exhibits the properties of a cargo‐selective endocytic clathrin adaptor
Mishra, S. K., Keyel, P. A., Hawryluk, M. J., Agostinelli, N. R., Watkins, S. C., & Traub, L. M. (2002) · The EMBO Journal · doi:10.1093/emboj/cdf487 · Cited by 302
Cited by
Molecular mechanism and physiological functions of clathrin-mediated endocytosis
McMahon, H. T., & Boucrot, E. (2011) · Nature Reviews Molecular Cell Biology · doi:10.1038/nrm3151 · Cited by 2,223
Mercer, J., Schelhaas, M., & Helenius, A. (2010) · Annual Review of Biochemistry · doi:10.1146/annurev-biochem-060208-104626 · Cited by 1,057
α-Synuclein impairs macroautophagy: implications for Parkinson’s disease
Winslow, A. R., Chen, C.-W., Corrochano, S., Acevedo-Arozena, A., Gordon, D. E., Peden, A. A., Lichtenberg, M., Menzies, F. M., Ravikumar, B., Imarisio, S., et al. (2010) · Journal of Cell Biology · doi:10.1083/jcb.201003122 · Cited by 825
“1035-Synuclein impairs macroautophagy • Winslow et al. For siRNA experiments, C1 cells were transfected with OnTargetPlus siRNA oligonucleotides (100 nM final concentration; Thermo Fisher Scientific) using Oligofectamine (Invitrogen) as previously described (Motley et al., 2003).”
EGF receptor trafficking: consequences for signaling and cancer
Tomas, A., Futter, C. E., & Eden, E. R. (2014) · Trends in Cell Biology · doi:10.1016/j.tcb.2013.11.002 · Cited by 779
Clathrin-independent endocytosis of ubiquitinated cargos
Sigismund, S., Woelk, T., Puri, C., Maspero, E., Tacchetti, C., Transidico, P., Di Fiore, P. P., & Polo, S. (2005) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.0409817102 · Cited by 739
Metadata
- Authors
- Motley, A., Bright, N. A., Seaman, M. N. J., & Robinson, M. S.
- Venue
- The Journal of Cell Biology
- Publisher
- Rockefeller University Press
- Published
- 2003-09-01
- Volume
- 162
- Issue
- 5
- Pages
- 909-918
- ISSN
- 0021-9525 (ISSN-L)
- 1540-8140
- OpenAlex
- W2032444338
- Cited by
- 697
- References
- 2
- FWCI
- 15.63
- Type
- journal article
- Language
- en
- Open access
- bronze
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