Dnajc2 Protein Dnaj Heat Shock Protein Family Member C2 is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
Overview
DNAJC2 (DnaJ Heat Shock Protein Family Member C2), also known as MOSPD2 (Mouse Osteoblast-Specific Protein 2), is an Hsp40 family co-chaperone that plays critical roles in protein folding, quality control, and cellular stress responses. It assists Hsp70 proteins in nascent protein folding, disaggregation, and targeting misfolded proteins for degradation. [@rosenzweig2019]
Protein Information
Structure
DNAJC2 contains several functional domains:
J Domain: N-terminal ~70 amino acids containing the Hsp40 signature motif (HPD) that stimulates Hsp70 ATPase activity
Gly/Phe-Rich Region: Flexible linker region with low complexity
C-terminal Substrate-Binding Domain: Binds client proteins for delivery to Hsp70
Transmembrane Region: C-terminal anchor for ER/membrane association
Normal Function
Protein Folding Assistance
Works with Hsp70 (HSPA1A, HSPA8) to fold nascent polypeptides
Prevents aggregation of newly synthesized proteins
Facilitates refolding of stress-denatured proteins
Kikuchi H et al. (2005). "A novel human Hsp40, DNAJC2, is a molecular chaperone that complements aggregation of null др." Cell Stress Chaperones. PMID: 16009607(https://pubmed.ncbi.nlm.nih.gov/16009607/)
Hageman J et al. (2010). "A DNAJC2 mutant related to neurodegenerative disease causes severe growth defect when expressed in yeast." J Neurochem. PMID: 20598020(https://pubmed.ncbi.nlm.nih.gov/20598020/)
Zarouchlioti C et al. (2018). "DNAJC2 in protein homeostasis and disease." J Mol Biol. PMID: 29395067(https://pubmed.ncbi.nlm.nih.gov/29395067/)
Williams AJ et al. (2009). "The Hsp40 family: key regulators of proteostasis." Cell Stress Chaperones. PMID: 19165640(https://pubmed.ncbi.nlm.nih.gov/19165640/)
Background
The study of Dnajc2 Protein Dnaj Heat Shock Protein Family Member C2 has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.