HPK1–inhibitor dynamics: the 9H8D structural model

This visualization follows an HPK1 protein–ligand complex built from the structural record PDB 9H8D. The deposited structure identifies HPK1 carrying the T165E/S171E substitutions in complex with compound 6. These details matter: a modified protein construct and a particular bound molecule should not be silently described as every form of HPK1 in a cell.

Reading the binding pocket

Locate the small molecule within the kinase pocket, then follow nearby loops and side chains as the protein moves. Changes in distance or orientation can suggest contacts worth measuring. The ligand remaining near its starting position is an observation about this displayed trajectory, rather than a direct measurement of potency, residence time or selectivity.

The structural record and its associated research provide the chemical identity and experimental context. A crystal structure supplies a three-dimensional starting model. A dynamics calculation adds a time sequence under chosen simulation conditions. Keeping these two kinds of evidence separate makes the animation more useful for students and medicinal chemists.

Research context and limits

The original presentation discusses HPK1 in immune signalling and inhibitor discovery. That context does not turn this complex into an approved cancer treatment or demonstrate a benefit for patients. In particular, selectivity requires comparisons with other targets, and a rendered binding pose cannot provide those comparisons.

When assessing the movie, ask which atoms were included, whether missing residues were modelled, how the ligand was parameterized and whether repeated simulations agree. Those details are not fully documented on this page. Use the animation as an introduction to protein–ligand motion and consult the deposited structure and research paper for the experimental claims.

Continue exploring

• Molecular docking and drug design (Turkish)
• Another visualization of the HPK1 complex

Sources and structural records

• RCSB PDB 9H8D: HPK1 T165E/S171E with compound 6
• GROMACS reference manual: molecular dynamics