Talus opens a protein-screening portal that does not require a 3D structure

The October 1 change is access: the underlying model was introduced in a July preprint, rather than discovered this week.

The model places protein residues and molecules in a shared mathematical space, using sequence and two-dimensional chemistry. Their proximity estimates engagement. This can nominate both a compound and the stretch of protein it might interact with, including sites poorly represented by a single folded structure. The preprint reports evaluations by Talus's own researchers; all authors declare employment at the company.[2]

As checked on October 2, the launch page describes a limit of 10,000 compounds per screen and ten screens per day, with a supplied compound library or the user's own. An account is required.[1][4] The portal can display predictions on an AlphaFold structure, but that picture is not an input to Ptarmigan's calculation.[1]

For a group without a useful target structure, the portal offers a sequence-based route to prioritizing compounds for experiments. A ranked hit remains a hypothesis: the service terms require independent validation and exclude patient-care use. They also say customer materials and outputs will not train a generalized model without prior written consent.[3] Read those terms before uploading unpublished chemistry. No screening run or prospective validation was performed for this report.