Mechanism of Action & Differentiation

Target Biology

1. Hsp is a master chaperone stabilizing multiple oncogenic client proteins.
2. Conventional inhibitors broadly block cytosolic Hsp → client protein degradation, and systemic toxicity.
3. Tumor cells uniquely harbor an abundant mitochondria specific Hsp pool, essential for:

• 1. Mitochondrial integrity
  2. Oxidative phosphorylation
  3. Cell death resistance

Gam-05 Design

1. Gam-05 is a rationally engineered conjugate combining:
   1. An inhibitory moiety
   2. A mitochondrial-targeting vector
2. This design physically directs the drug to mitochondria.

Key Differentiation

1. Confirmed mitochondrial localization (high mitochondria/cytosol ratio)
2. No inhibition of cytosolic Hsp, preserving normal protein homeostasis
3. Avoidance of the heat-shock response

This mechanistic selectivity forms the core value proposition of the asset.