Format

Send to

Choose Destination
Cell. 1981 Apr;24(1):175-84.

Early changes in the distribution and organization of microfilament proteins during cell transformation.

Abstract

During the onset of transformation, Rous sarcoma virus-infected cells undergo characteristic morphological changes that reflect the biochemical events induced by the viral src gene. Temperature downshift experiments using chick embryo cells infected with transformation-defective temperature-sensitive viral mutants have shown two major morphological changes occurring at different times in the transformation process: ruffle-like flowers appear on the dorsal cell surface as early as 15 min after temperature shift, while later, between 6 and 12 hr, cytoskeletal stress fibers disappear and the cells round up. We report that flowers contain large accumulations of the cytoskeletal proteins actin, alpha-actinin, myosin and tropomyosin. Furthermore, since flowers stain very intensely with fluorescein-labeled phalloidin, a cyclopeptide that selectively binds to F-actin and not to G-actin, we suggest that these structures result from an early reorganization of microfilaments.

PMID:
6263486
DOI:
10.1016/0092-8674(81)90513-4
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center