Essential Structural and Functional Features of Small Heat Shock Proteins in Molecular Chaperoning Process
Abstract:Small heat shock proteins are ubiquitously found in all three domains of life, although they are the most poorly conserved family of molecular chaperones. Their involvement in anti-stress mechanisms of the cells have been clearly demonstrated by induction of their expression in response to various environmental and pathological stresses. Small heat shock proteins comprise the most effective chaperone family concerning their unusual capacity of substrate binding. It is well documented that small heat shock proteins associate with unfolding substrate proteins and form large oligomeric complexes to prevent their aggregation and accumulation, that otherwise would impair the normal cell functions. The substrates captured by small heat shock proteins are further refolded to their native state by ATP depended chaperones. During heat stress, the induced expression and activation of the small heat shock proteins, might reflect that this mechanism of protein quality control contributes to acquired thermotolerance in hyperthermophilic archaea, as well.
Document Type: Research Article
Publication date: June 1, 2009
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- Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.