Crossref journal-article
Rockefeller University Press
The Journal of Cell Biology (291)
Abstract

In the salivary glands of the dipteran Chironomus tentans, a specific messenger ribonucleoprotein (mRNP) particle, the Balbiani ring (BR) granule, can be visualized during its assembly on the gene and during its nucleocytoplasmic transport. We now show with immunoelectron microscopy that actin becomes associated with the BR particle concomitantly with transcription and is present in the particle in the nucleoplasm. DNase I affinity chromatography experiments with extracts from tissue culture cells indicate that both nuclear and cytoplasmic actin are bound to the heterogeneous RNP (hnRNP) protein hrp36, but not to the hnRNP proteins hrp23 and hrp45. The interaction is likely to be direct as purified actin binds to recombinant hrp36 in vitro. Furthermore, it is demonstrated by cross linking that nuclear as well as cytoplasmic actin are bound to hrp36 in vivo. It is known that hrp36 is added cotranscriptionally along the BR mRNA molecule and accompanies the RNA through the nuclear pores and into polysomes. We conclude that actin is likely to be bound to the BR transcript via hrp36 during the transfer of the mRNA from the gene all the way into polysomes.

Bibliography

Percipalle, P., Zhao, J., Pope, B., Weeds, A., Lindberg, U., & Daneholt, B. (2001). Actin Bound to the Heterogeneous Nuclear Ribonucleoprotein Hrp36 Is Associated with Balbiani Ring mRNA from the Gene to Polysomes. The Journal of Cell Biology, 153(1), 229–236.

Authors 6
  1. Piergiorgio Percipalle (first)
  2. Jian Zhao (additional)
  3. Brian Pope (additional)
  4. Alan Weeds (additional)
  5. Uno Lindberg (additional)
  6. Bertil Daneholt (additional)
References 18 Referenced 118
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Dates
Type When
Created 23 years, 1 month ago (July 26, 2002, 12:46 p.m.)
Deposited 2 years, 1 month ago (July 22, 2023, 7:30 a.m.)
Indexed 1 month, 4 weeks ago (July 2, 2025, 3:07 p.m.)
Issued 24 years, 4 months ago (April 2, 2001)
Published 24 years, 4 months ago (April 2, 2001)
Published Online 24 years, 4 months ago (April 2, 2001)
Published Print 24 years, 4 months ago (April 2, 2001)
Funders 0

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