A Family of Related Proteins is Encoded by the Major Drosophila Heat Shock Gene Family

Overview

Journal Mol Cell Biol

Specialty Cell Biology

Date 1982 Mar 1

PMID 6810095

Citations 6

Authors

S C Wadsworth

Affiliations

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Abstract

At least four proteins of 70,000 to 75,000 molecular weight (70-75K) were synthesized from mRNA which hybridized with a cloned heat shock gene previously shown to be localized to the 87A and 87C heat shock puff sites. These in vitro-synthesized proteins were indistinguishable from in vivo-synthesized heat shock-induced proteins when analyzed on sodium dodecyl sulfate-polyacrylamide gels. A comparison of the pattern of this group of proteins synthesized in vivo during a 5-min pulse or during continuous labeling indicates that the 72-75K proteins are probably not kinetic precursors to the major 70K heat shock protein. Partial digestion products generated with V8 protease indicated that the 70-75K heat shock proteins are closely related, but that there are clear differences between them. The partial digestion patterns obtained from heat shock proteins from the Kc cell line and from the Oregon R strain of Drosophila melanogaster are very similar. Genetic analysis of the patterns of 70-75K heat shock protein synthesis indicated that the genes encoding at least two of the three 72-75K heat shock proteins are located outside of the major 87A and 87C puff sites.

Citing Articles

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Is the major Drosophila heat shock protein present in cells that have not been heat shocked?.

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Deletion polymorphism in a Drosophila melanogaster heat shock gene.

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