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• W2150603556 abstract "Profilins, regulators of cytoplasmic actin dynamics, also bind to several nuclear proteins but the significance of these interactions is mostly unclear. Here, we describe a novel Myb-related transcription factor, p42POP, as a new ligand for profilin and show that profilin regulates its activity. p42POP comprises a unique combination of domains and is widely expressed in mouse tissues. In contrast to many other Myb proteins, it contains only one functional tryptophan-cluster motif. This is followed by an acidic domain, a leucine zipper that mediates dimerization and functional nuclear import and export signals that can direct p42POP to either the nuclear or the cytoplasmic compartment. Binding to profilins is mediated by a proline-rich cluster. p42POP-profilin complexes can be precipitated from cell lysates. In transfected cells displaying p42POP in the nucleus, nuclear profilin is markedly increased. When p42POP is anchored at mitochondrial membranes, profilin is targeted to this location. Hence, in a cellular environment, p42POP and profilin are found in the same protein complex. In luciferase assays, p42POP acts as repressor and this activity is substantially reduced by profilins, indicating that profilin can regulate p42POP activity and is therefore involved in gene regulation." @default.
• W2150603556 created "2016-06-24" @default.
• W2150603556 creator A5046836222 @default.
• W2150603556 creator A5079926368 @default.
• W2150603556 creator A5085748857 @default.
• W2150603556 date "2005-01-15" @default.
• W2150603556 modified "2023-09-26" @default.
• W2150603556 title "Profilin regulates the activity of p42<i>POP</i>, a novel Myb-related transcription factor" @default.
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• W2150603556 doi "https://doi.org/10.1242/jcs.01618" @default.
• W2150603556 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/15615774" @default.
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