ProxAI
AI Generated Protein Binder
bioPROTAC & Binder Engineering

Bind the Unbindable.

Target binder, E3 binder, or both: built from structure, matched for productive ternary-complex geometry, and validated in cells.

Institutional Anchors & Collaborators
IRCM
D3
UdeM
&
McGill
Why ProxAI

Structural and functional bottlenecks, addressed

Addressing the structural and functional bottlenecks holding back targeted protein degradation pipelines.

The E3 Ligase Bottleneck

The problem: CRBN and VHL dominate the field's E3 ligase-related module choices, driving acquired resistance and limited tissue specificity.

What you get instead:Expanding past CRBN and VHL usually means panning a physical library against a new ligase from the ground up. You get a target-binding module built directly from your target's structure instead — compatible with MDM2, IAP, or your proprietary E3 system — with binding activity already confirmed in cells before it reaches your bench.

The E3 Ligand Discovery Problem

The problem: Small-molecule ligand discovery for novel E3 ligases runs into family-wide promiscuity — candidate ligands often bind several ligases within the same family, and where they do land on the right one, binding competition inside a conserved pocket keeps affinity low.

What you get instead:A protein binder built directly against your chosen E3 ligase's structure — engineered for the selectivity and affinity a small-molecule screen can't reliably deliver against a new ligase family member.

The "Undruggable" Target

The problem: A degrader still needs a target-binding module. Flat surfaces, disordered regions, and complex PPI topologies defeat small-molecule warhead discovery the same way they defeat any small-molecule campaign.

What you get instead:A miniprotein or nanobody as the target-recognition module of your degrader — built directly from your target's structure, for interfaces with no pocket to speak of.

Binding Isn't the Same as Working

The problem: A binder that hits the target isn't automatically a working degrader. If the epitope positions the target's accessible ubiquitination sites away from the E3 module, transfer never happens — a perfectly good binder can still produce zero degradation.

What you get instead:Not just affinity. An epitope chosen with the ternary complex geometry in mind — because a binder that can't support productive ubiquitination isn't a target-binding module, it's just a binder that doesn't do anything for your program.

Secure Communication Channel

It starts here
Your target does the rest.

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Operational HQ

Montreal Clinical Research Institute (IRCM)
IRCM Building - ProxAI Headquarters IRCM Logo

> Wet Lab Infrastructure

Embedded within the prestigious IRCM, our physical laboratory bridges the critical gap between in silico generation and in vitro reality.

> High-Throughput Validation

Rapid, large-scale screening of computationally engineered binders. Executing proprietary validation workflows within native cellular contexts.

> Translational Excellence

Direct integration with top-tier microscopy, genomics, proteomics, immunology, and oncology resources, enabling accelerated development pipelines.