Abstract
Wiskott-Aldrich syndrome protein (WASp) is a hematopoietic-specific, multidomain protein whose mutation is responsible for the immunodeficiency disorder Wiskott-Aldrich syndrome. WASp contains a binding motif for the Rho GTPase CDC42Hs as well as verprolin/cofilin-like actin-regulatory domains, but no specific actin structure regulated by CDC42Hs-WASp has been identified. We found that WASp colocalizes with CDC42Hs and actin in the core of podosomes, a highly dynamic adhesion structure of human blood-derived macrophages. Microinjection of constitutively active V12CDC42Hs or a constitutively active WASp fragment consisting of the verprolin/cofilin-like domains led to the disassemly of podosomes. Conversely, macrophages from patients expressing truncated forms of WASp completely lacked podosomes. These findings indicate that WASp controls podosome assembly and, in cooperation with CDC42Hs, podosome disassembly in primary human macrophages.
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Dates
Type | When |
---|---|
Created | 23 years ago (July 26, 2002, 10:32 a.m.) |
Deposited | 2 years, 4 months ago (April 22, 2023, 8:09 a.m.) |
Indexed | 1 month, 1 week ago (July 16, 2025, 8:16 a.m.) |
Issued | 26 years ago (Aug. 17, 1999) |
Published | 26 years ago (Aug. 17, 1999) |
Published Online | 26 years ago (Aug. 17, 1999) |
Published Print | 26 years ago (Aug. 17, 1999) |
@article{Linder_1999, title={Wiskott-Aldrich syndrome protein regulates podosomes in primary human macrophages}, volume={96}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.96.17.9648}, DOI={10.1073/pnas.96.17.9648}, number={17}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Linder, Stefan and Nelson, David and Weiss, Michael and Aepfelbacher, Martin}, year={1999}, month=aug, pages={9648–9653} }