/AI9h ago

ipTM and ipSAE Metrics Fail to Predict Protein Binding Affinity

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Original postAnshul Kundaje#1650

@LeoWanPhD @ranomics Theoretically, it shouldn't. All it predicts is: P(binding mode | it binds). Aka. assuming that it DOES bind, how confident are you about the predicted model of how/where it binds.

5:46 AM · Jun 9, 2026 · 3.7K Views
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Users agreed that ipTM and ipSAE metrics fail to predict protein binding affinity because the claim correctly highlights their limitations for de novo filtering.

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@LeoWanPhD @ranomics That being said, people have been finding that when the confidence of where and how it binds is low. It's less likely to work experimentally.

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@sokrypton @LeoWanPhD @ranomics Right on the money! 🙌 @sokrypton what's the best substitute for ipTM/ipSAE for de novo filtering then? Do we train another ranking predictor on negative decoys? Should we expect this to ever generalize well?

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