Cooperative interactions in transcriptional regulation.
Cooperative interactions between regulatory proteins and RNA polymerase are a common feature of transcriptional systems. We have developed a method, based on the electrophoresis mobility shift assay, for the measurement of cooperative effects in the binding of proteins to DNA restriction fragments. Using this approach we have identified a hitherto unknown interaction between the E. coli lactose repressor and CAP proteins. We suggest that this interaction plays a role in the control of the lactose operon that is not predicted by current regulatory models.
Department of Biochemistry, University of Texas Health Science Center, San Antonio 78284-7760.
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Fried
D001426:Bacterial Proteins / Q000235:genetics / Q000378:metabolism*; D004268:DNA-Binding Proteins / Q000378:metabolism*; D004591:Electrophoresis, Polyacrylamide Gel; D004926:Escherichia coli / Q000235:genetics*; D015964:Gene Expression Regulation, Bacterial; D011401:Promoter Regions, Genetic; D011485:Protein Binding; D012097:Repressor Proteins / Q000235:genetics
D001426:Bacterial Proteins; D004268:DNA-Binding Proteins; D012097:Repressor Proteins