Eukaryotic protein homeostasis (proteostasis) is largely dependent on the action of highly conserved Hsp70 molecular chaperones. Recent evidence indicates that apart from conserved molecular allostery, Hsp70 proteins retained and adapted throughout the evolution the ability to assemble as functional...
This model is from the article:
Modelling the Role of the Hsp70/Hsp90 System in the Maintenance of Protein Homeostasis
Proctor CJ, Lorimer IAJ
PLoS ONE2011; 6(7): e22038.
doi:10.1371/journal.pone.0022038,
Abstract:
Neurodegeneration is a...
This is a mathematical model of Hsp70 induction. To model heat shock effects, the model incorporates temperature dependencies in transcirption to Hsp70 mRNA and in dissociation of transcriptional complexes, in addition to a formal expression relating temperature to protein denaturation.
Hop/Stip1/Sti1 is thought to be essential as a co-chaperone to facilitate substrate transfer between the Hsp70 and Hsp90 molecular chaperones. Despite this proposed key function for protein folding and maturation, it is not essential in a number of eukaryotes and bacteria lack an ortholog. We set ou...
Folding of stringent clients requires transfer from Hsp70 to Hsp90. The co-chaperone Hop physically connects the chaperone machineries. Here we define its role from the remodeling of Hsp70/40-client complexes to the mechanism of client transfer and the conformational switching from stalled to active...
ORGANISM(S): Homo sapiens (Human) Saccharomyces cerevisiae (Baker's yeast)
Parkinson’s disease (PD) and Dementia with Lewy bodies (DLB) are the two most common examples of synucleinopathies, i.e. human disorders that display intracellular deposition of the Alpha-synuclein (aSYN) protein. The two forms of aSYN deposits, intracellular Lewy bodies and Lewy neurites, are in ...
Yeast DNA microarray was used to assess and compare the global expression profile of strains harboring different family members of the major cytosolic Hsp70 family. Viability of a yeast strain deleted for all genes encoding members of the Hsp70-Ssa family (Ssa1/2/3/4) was maintained by the presence ...
