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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Demonstration by genetic suppression of interaction of GroE products with many proteins.

The way in which proteins attain and maintain their final form is of fundamental importance. Recent work has focused on the role of a set of ubiquitous proteins, termed chaperonins, in the assembly of phage and multisubunit proteins. The range of chaperonin action is unknown; they could interact with most cellular polypeptides or have a limited subset of protein partners. Included in the chaperonin family is the essential heat-shock regulated Escherichia coli groEL gene product. Over-expression of the groE operon in E. coli causes enhanced assembly of heterologously expressed ribulose bisphosphate carboxylase subunits and suppresses the heat-sensitive mutant phenotype of several dnaA alleles. It has been inferred that suppression of heat-sensitive mutations is confined to dnaA alleles and that this confinement could reflect an interaction between the groE operon products and a dnaA protein aggregate at the replication origin. We now report that multiple copies of the groE operon suppress mutations in genes encoding several diverse proteins. Our data indicate a general role for the groE operon products, the GroEL and GroES proteins, in the folding-assembly pathways of many proteins.[1]


  1. Demonstration by genetic suppression of interaction of GroE products with many proteins. Van Dyk, T.K., Gatenby, A.A., LaRossa, R.A. Nature (1989) [Pubmed]
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