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Cited by 198

The DOI matches its Crossref record; 4 of the 4 references it cites were found in a registry or an index.

Cofilin is a pH sensor for actin free barbed end formation: role of phosphoinositide binding

Open access
Frantz, Christian, Barreiro, Gabriela, Dominguez, Laura, Chen, Xiaoming, Eddy, Robert, Condeelis, John, Kelly, Mark J.S., Jacobson, Matthew P., Barber, Diane L.·2008·The Journal of Cell Biology

Abstract

Newly generated actin free barbed ends at the front of motile cells provide sites for actin filament assembly driving membrane protrusion. Growth factors induce a rapid biphasic increase in actin free barbed ends, and we found both phases absent in fibroblasts lacking H+ efflux by the Na-H exchanger NHE1. The first phase is restored by expression of mutant cofilin-H133A but not unphosphorylated cofilin-S3A. Constant pH molecular dynamics simulations and nuclear magnetic resonance (NMR) reveal pH-sensitive structural changes in the cofilin C-terminal filamentous actin binding site dependent on His133. However, cofilin-H133A retains pH-sensitive changes in NMR spectra and severing activity in vitro, which suggests that it has a more complex behavior in cells. Cofilin activity is inhibited by phosphoinositide binding, and we found that phosphoinositide binding is pH-dependent for wild-type cofilin, with decreased binding at a higher pH. In contrast, phosphoinositide binding by cofilin-H133A is attenuated and pH insensitive. These data suggest a molecular mechanism whereby cofilin acts as a pH sensor to mediate a pH-dependent actin filament dynamics.

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Metadata

Authors
Frantz, C., Barreiro, G., Dominguez, L., Chen, X., Eddy, R., Condeelis, J., Kelly, M. J. S., Jacobson, M. P., & Barber, D. L.
Venue
The Journal of Cell Biology
Published
2008-11-24
Volume
183
Issue
5
Pages
865-879
ISSN
  • 0021-9525 (ISSN-L)
  • 1540-8140
OpenAlex
W2109493256
Cited by
198
References
4
FWCI
5.12
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: Cofilin is a pH sensor for actin free barbed end formation: role of phosphoinositide binding. https://app.cochat.ai/papers/10.1083/jcb.200804161
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Frantz, C., Barreiro, G., Dominguez, L., Chen, X., Eddy, R., Condeelis, J., Kelly, M. J. S., Jacobson, M. P., & Barber, D. L. (2008). Cofilin is a pH sensor for actin free barbed end formation: role of phosphoinositide binding. The Journal of Cell Biology. https://doi.org/10.1083/jcb.200804161

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