TRAP1: Lysates

The 90 kDa heat shock protein (hsp90) family of molecular chaperones is a highly conserved family of proteins that play an important physiological role. Hsp90 is involved in numerous cellular processes but is best known for its association with signal transduction machinery. A recently cloned homolog of hsp90 is TRAP1. Like hsp90, TRAP1 is found to be associated with numerous proteins involved in diverse actions. Immunofluorescence data has shown TRAP1 to be localized in the mitochondria of mammalian cells. This observation and the fact that TRAP1 is shown to have a mitochondrial targeting presequence strongly implicates TRAP1 as a mitochondrial matrix protein. Immunofluorescence staining of TRAP1 in PC-3-M cells with this antibody produces a pattern consistent with mitochondrial staining. Immunoprecipitation of TRAP1 using this antibody fails to co-precipitate p23, Hop, or CyP40 suggesting TRAP1®s inability to associate with these co-chaperones.