#The chaperone 3d comic drivers#

Peptide binding and release by proteins implicated as catalysts of protein assembly. Common and divergent peptide binding specificities of hsp70 molecular chaperones. The novolactone natural product disrupts the allosteric regulation of Hsp70. Identification of an allosteric pocket on human hsp70 reveals a mode of inhibition of this therapeutically important protein. Identifying and characterizing binding sites and assessing druggability. Characterization of a lidless form of the molecular chaperone DnaK: deletion of the lid increases peptide on- and off-rate constants. Molecular basis for interactions of the DnaK chaperone with substrates. Hsp70 chaperones are non-equilibrium machines that achieve ultra-affinity by energy consumption. Mechanism of regulation of hsp70 chaperones by DnaJ cochaperones. DnaJ dramatically stimulates ATP hydrolysis by DnaK: insight into targeting of Hsp70 proteins to polypeptide substrates. Multistep mechanism of substrate binding determines chaperone activity of Hsp70. An interdomain energetic tug-of-war creates the allosterically active state in Hsp70 molecular chaperones. The specialized Hsp70 (HscA) interdomain linker binds to its nucleotide-binding domain and stimulates ATP hydrolysis in both cis and trans configurations. Allosteric signal transmission in the nucleotide-binding domain of 70-kDa heat shock protein (Hsp70) molecular chaperones.

Allosteric regulation of Hsp70 chaperones involves a conserved interdomain linker. Pathways of allosteric regulation in Hsp70 chaperones.

Kityk, R., Vogel, M., Schlecht, R., Bukau, B. Structural analysis of substrate binding by the molecular chaperone DnaK. The peptide-binding domain of the chaperone protein Hsc70 has an unusual secondary structure topology. Three-dimensional structure of the ATPase fragment of a 70K heat-shock cognate protein.

The remarkable multivalency of the Hsp70 chaperones. The nucleotide exchange factors of Hsp70 molecular chaperones. Hierarchical functional specificity of cytosolic heat shock protein 70 (Hsp70) nucleotide exchange factors in yeast.

#The chaperone 3d comic drivers#

The HSP70 chaperone machinery: J proteins as drivers of functional specificity. Widespread proteome remodeling and aggregation in aging C. The detection and role of heat shock protein 70 in various nondisease conditions and disease conditions: a literature review. Hsp70 - a master regulator in protein degradation. R., Gragera, M., Ochoa-Ibarrola, L., Quintana-Gallardo, L. Cellular handling of protein aggregates by disaggregation machines. Hsp70 at the membrane: driving protein translocation. Protein disaggregation in multicellular organisms. In vivo aspects of protein folding and quality control. This knowledge showcases how the Hsp70 chaperone system controls diverse cellular functions, and offers new opportunities for the development of chemical compounds that modulate disease-related Hsp70 activities.īalchin, D., Hayer-Hartl, M. In this Review we describe recent advances that have increased our understanding of the molecular mechanisms and working principles of the Hsp70 network. Moreover, Hsp70s cooperate with other cellular chaperone systems including Hsp90, Hsp60 chaperonins, small heat shock proteins and Hsp100 AAA+ disaggregases, together constituting a dynamic and functionally versatile network for protein folding, unfolding, regulation, targeting, aggregation and disaggregation, as well as degradation. A large set of co-chaperones comprising J-domain proteins and nucleotide exchange factors regulate the ATPase cycle of Hsp70s, which is allosterically coupled to substrate binding and release. They function virtually at all stages of the life of proteins from synthesis to degradation and are thus crucial for maintaining protein homeostasis, with direct implications for human health. The 70-kDa heat shock proteins (Hsp70s) are ubiquitous molecular chaperones that act in a large variety of cellular protein folding and remodelling processes.