Heat shock-related 70 kDa protein 2 (446-455)

Heat shock-related 70 kDa protein 2 (446-455) is a synthetic peptide fragment derived from the amino acid sequence of the HSP70 family, specifically corresponding to residues 446 through 455 of the human protein. As a segment of the highly conserved heat shock protein 70, this peptide is of significant interest in molecular biology and proteomics due to its role in cellular stress responses, protein folding mechanisms, and chaperone-mediated pathways. Its defined sequence and structural properties make it a valuable tool for research focused on understanding the functional domains of HSP70 proteins, as well as for developing assays that probe protein-protein interactions, post-translational modifications, and peptide-based recognition events.

Peptide mapping and epitope characterization: The 446-455 fragment of HSP70 provides a precise molecular probe for epitope mapping and antibody specificity studies. Researchers utilize this peptide to identify and validate antibody binding sites within the C-terminal region of HSP70, facilitating the development of highly specific immunoreagents for detection, quantification, and localization of HSP70 proteins in biochemical assays. Such mapping is crucial for distinguishing between closely related heat shock protein isoforms and for generating targeted reagents in immunological research.

Protein-protein interaction studies: As a defined segment of HSP70, this peptide serves as a model substrate for investigating the molecular determinants of chaperone-substrate recognition. By incorporating the 446-455 sequence into binding assays, scientists can dissect the sequence motifs and structural features that mediate interactions with co-chaperones, client proteins, or regulatory factors. These studies enhance understanding of the conformational dynamics and allosteric regulation underlying HSP70 function and are instrumental in elucidating the molecular basis of cellular proteostasis.

Phosphorylation and post-translational modification analysis: The sequence of the 446-455 peptide encompasses sites that may be subject to phosphorylation or other post-translational modifications in vivo. Synthetic versions of this peptide enable controlled in vitro studies to monitor kinase activity, substrate specificity, or the effects of modification on protein function. This approach supports the identification of regulatory pathways that modulate HSP70 activity and aids in the development of analytical standards for mass spectrometry or immunoassay-based detection of modified peptides.

Peptide-based assay development: The defined nature of the 446-455 fragment facilitates its use in the creation of quantitative and qualitative assays, including enzyme-linked immunosorbent assays (ELISAs), competition binding studies, and fluorescence polarization assays. Its application extends to the calibration of analytical platforms and the validation of peptide detection methodologies. By serving as a reference or competitor peptide, it supports the establishment of robust, reproducible, and sensitive assays for HSP70-related research.

Peptide synthesis and structural studies: The 446-455 peptide is frequently employed as a model sequence in solid-phase peptide synthesis optimization and structure-activity relationship (SAR) investigations. Its manageable length and well-characterized sequence allow researchers to explore peptide folding, stability, and conformational preferences using spectroscopic or computational techniques. These studies inform the rational design of peptide analogs and contribute to the broader understanding of structure-function relationships within the HSP70 protein family.

1. Implications of ligand-receptor binding kinetics on GLP-1R signalling

2. Autoinhibition and phosphorylation-induced activation of phospholipase C-γ isozymes

3. The effect of sex on immune responses to a homocitrullinated peptide in the DR4-transgenic mouse model of Rheumatoid Arthritis

4. Myotropic activity and immunolocalization of selected neuropeptides of the burying beetle Nicrophorus vespilloides (Coleoptera: Silphidae)

5. Cationic cell-penetrating peptides are potent furin inhibitors