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Inducible expression of a cloned heat shock fusion gene in sea urchin embryos

McMahon, Andrew P. and Novak, Thomas J. and Britten, Roy J. and Davidson, Eric H. (1984) Inducible expression of a cloned heat shock fusion gene in sea urchin embryos. Proceedings of the National Academy of Sciences of the United States of America, 81 (23). pp. 7490-7494. ISSN 0027-8424. PMCID PMC392172.

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A fusion gene construct, in which the coding sequence for bacterial chloramphenicol acetyltransferase (CAT; acetyl-CoA: chloramphenicol 3-O-acetyltransferase, EC was placed under the control of the regulatory region of the Drosophila gene encoding the 70-kilodalton heat shock protein [Di Nocera, P. P. & Dawid, I. B. (1983) Proc. Natl. Acad. Sci. USA 80, 7095-7098], was microinjected into the cytoplasm of unfertilized sea urchin eggs. Pluteus-stage embryos developing from the injected eggs were exposed to high temperature conditions that we found would elicit an endogenous sea urchin heat shock response. These embryos express the gene for CAT and, after heat treatment, display 8-10 times more CAT enzyme activity than do extracts from control embryos cultured at normal temperatures. The injected DNA is present in high molecular weight concatenates and, during development, is amplified about 100-fold. Amplified sequences are responsible for all or most of the induced CAT enzyme activity.

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Additional Information:© 1984 by the National Academy of Sciences. Contributed by Roy J. Britten, August 3, 1984. We are much indebted to Dr. Igor Dawid for supplying the plasmid hsp-cat1. The CAT enzyme preparation was the gift of Drs. G. Smith and M. Summers. We thank Drs. N. Davidson, E. Rothenberg, and B. Wold for thoughtful comments on the manuscript. This work was supported by the National Institute of Child Health and Human Development (HD05753). A.P.M. was supported by American Cancer Society California Division Fellowship J-33-82, and T.J.N., by National Institutes of Health Training Grant GM07616. The publication costs of this article were defrayed in part by page charge payment. This article must therefore be hereby marked "advertisement" in accordance with 18 U.S.C. §1734 solely to indicate this fact.
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American Cancer Society, California DivisionJ-33-82
Subject Keywords:microinjection; gene regulation
Issue or Number:23
PubMed Central ID:PMC392172
Record Number:CaltechAUTHORS:MCMpnas84
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:9027
Deposited By: Tony Diaz
Deposited On:23 Oct 2007
Last Modified:02 Oct 2019 23:56

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