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. 1983 Oct 1;97(4):1309–1314. doi: 10.1083/jcb.97.4.1309

Canavanine inhibits vimentin assembly but not its synthesis in chicken embryo erythroid cells

PMCID: PMC2112606  PMID: 6684664

Abstract

In chicken embryo erythroid cells, newly synthesized vimentin first enters a Triton X-100 (TX-100)-soluble pool and subsequently assembles posttranslationally into TX-100-insoluble vimentin filaments (Blikstad I., and E. Lazarides, J. Cell Biol., 96:1803-1808). Here we show that incubation of chicken embryo erythroid cells in a medium in which arginine has been substituted by its amino acid analogue, canavanine, results in the inhibition of the posttranslational assembly of vimentin into the TX-100-insoluble filaments. Immunoprecipitation and subsequent SDS gel electrophoresis showed that the synthesis of canavanine- vimentin is not inhibited and that it accumulates in the TX-100-soluble compartment. Pulse-chase experiments with [35S]methionine demonstrated that while arginine-vimentin can be rapidly chased from the soluble to the cytoskeletal fraction, canavanine-vimentin remains in the soluble fraction, where it turns over. The effect of canavanine on the assembly of vimentin did not prevent the assembly of arginine-vimentin, as cells labeled with [35S]methionine first in the presence of canavanine and then in the presence of arginine contained labeled canavanine-vimentin only in the soluble fraction, and arginine-vimentin in both the soluble and cytoskeletal fractions. These results suggest that arginine residues play an essential role in the assembly of vimentin in vivo.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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