Transcription of simian virus 40. III : mapping of "early" and "late" species of RNA

Sambrook, J. and Sugden, B. and Keller, W. and Sharp, P. A.. (1973) Transcription of simian virus 40. III : mapping of "early" and "late" species of RNA. Proceedings of the National Academy of Sciences of the United States of America, 70 (12). pp. 3711-3715.

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Official URL: http://edoc.unibas.ch/dok/A5258018

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To determine the orientation of transcription of the E and L strands of DNA from simian virus 40 (SV40), we used linear DNA prepared by cleavage of superhelical viral DNA by endonuclease R.R(1) from Escherichia coli as a primer.template for DNA polymerase. The resulting molecules, which were labeled only at the 3' end of each DNA strand, were then cleaved with Hemophilus parainfluenzae endonuclease Hpa I. The ensuing four DNA fragments, whose locations on the viral genome are known, were separated by electrophoresis, denatured, and hybridized to asymmetric SV40 complementary RNA. From the pattern of hybridization of the fragments containing the labeled 3' ends, we conclude that transcription of SV40 proceeds in a clockwise direction on the L strand and in a counterclockwise direction on the E strand as drawn on the conventional SV40 map. To map the "early" and "late" regions of the viral genome, we extracted RNA from lytically infected cells and hybridized it to the separated strands of the four fragments of (32)P-labeled SV40 DNA. Early after infection, RNA complementary to part of the E strand of the contiguous fragments A and C was detected. Late polysomal RNA was complementary to part of the L strand sequences of fragments A and C and to the total L strand sequence of fragments B and D.
Faculties and Departments:05 Faculty of Science > Departement Biozentrum > Former Organization Units Biozentrum > Cell Biology (Keller)
UniBasel Contributors:Keller, Walter
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:National Academy of Sciences
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:07 Nov 2017 12:06
Deposited On:22 Mar 2012 13:19

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