Journal article
Tropomodulin/tropomyosin interactions regulate actin pointed end dynamics
Advances in experimental medicine and biology, Vol.644, pp.283-292
2008
Handle:
https://hdl.handle.net/2376/116478
PMID: 19209829
Abstract
Dynamics of the slow-growing (pointed) end of the actin filament is regulated by tropomodulins, a family of capping proteins that require tropomyosin for optimal function. Tropomodulin is an elongated molecule with a molecular mass of about 40 kDa, containing the Tm-independent actin-binding site at the C-terminus. The highly disordered N-terminal half of tropomodulin contains two Tm-binding sites and a Tm-dependent actin-binding site. There are many Tm isoforms whose distribution varies in different tissues and cell compartments and changes during development of these tissues. Tropomyosin/tropomodulin interactions are isoform specific. Differences in Tm affinity for the two binding sites in Tmod may regulate its correct positioning at the pointed end as well as effectiveness of capping actin filament. The regulation of tropomodulin binding may have significant consequences for local cytoskeletal formation and filament dynamics in cells.
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Details
- Title
- Tropomodulin/tropomyosin interactions regulate actin pointed end dynamics
- Creators
- Alla S Kostyukova - Department of Neuroscience and Cell Biology, Robert Wood Johnson Medical School, 675 Hoes Lane, Piscataway, NJ 08854, USA. kostyuas@umdnj.edu
- Publication Details
- Advances in experimental medicine and biology, Vol.644, pp.283-292
- Academic Unit
- Chemical Engineering and Bioengineering, School of
- Publisher
- United States
- Identifiers
- 99900548307201842
- Language
- English
- Resource Type
- Journal article