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The 3 CXXCXGXG Repeats proteins and their functions

S.NOUniprot ID Protein Name Sequence LengthCXXCXGXG Repeats regionFunction
1 P31689 DnaJ homolog subfamily A member 1 397"Co-chaperone for HSPA8/Hsc70 (PubMed:10816573)
Stimulates ATP hydrolysis, but not the folding of unfolded proteins mediated by HSPA1A (in vitro) (PubMed:24318877)
Plays a role in protein transport into mitochondria via its role as co-chaperone
Functions as co-chaperone for HSPA1B and negatively regulates the translocation of BAX from the cytosol to mitochondria in response to cellular stress, thereby protecting cells against apoptosis (PubMed:14752510)
Promotes apoptosis in response to cellular stress mediated by exposure to anisomycin or UV (PubMed:24512202)"
2 O60884 DnaJ homolog subfamily A member 2 412Co-chaperone of Hsc70
Stimulates ATP hydrolysis and the folding of unfolded proteins mediated by HSPA1A/B (in vitro) (PubMed:24318877)
3 Q96EY1 "DnaJ homolog subfamily A member 3, mitochondrial "480"Modulates apoptotic signal transduction or effector structures within the mitochondrial matrix
Affect cytochrome C release from the mitochondria and caspase 3 activation, but not caspase 8 activation
Isoform 1 increases apoptosis triggered by both TNF and the DNA-damaging agent mytomycin C; in sharp contrast, isoform 2 suppresses apoptosis
Can modulate IFN-gamma-mediated transcriptional activity
Isoform 2 may play a role in neuromuscular junction development as an effector of the MUSK signaling pathway"