Descriptors

Use the -d flag to save pocket descriptors in a CSV file (descriptors.csv). The file contains one row per pocket with the following columns, in order:

Column

Description

OutputFrame

Index of the frame in the output trajectory. Equal to the input frame index when no extraction or sorting is performed.

OriginalFrame

Index of the frame in the input trajectory. When multiple trajectories are concatenated this is the index in the concatenated trajectory (the reference frame is not counted).

PocketResid

Residue ID assigned to the pocket in the volume PDB file (starting at 800).

Score

Druggability score assigned by the neural network model.

Core Volume

Low-energy space available to the ligand, in ų. Proportional to the number of grid points and the grid spacing.

Surface

Surface area of the pocket, in Ų. A point is considered superficial when it has fewer than 5 adjacent points. The surface-to-volume ratio provides insight into pocket shape.

Accessible Volume

Low-energy space surrounding the pocket core, in ų. Counted on the low-resolution grid within the distance set by --accessible-cutoff.

Length1

First principal length of the pocket: the square root of the largest eigenvalue of the covariance matrix of the pocket surface points, in units of the grid spacing (0.5 Å).

Length2

Second principal length, in the same units.

Length3

Third principal length (smallest), in the same units.

Hydrophobicity

Fraction of pocket atoms with an absolute partial charge less than 0.3e.

Enclosure

Enclosure indicator between 0 and 1, computed from the vectors joining each surface point to its nearest atoms. In a buried pocket the atoms surround the points and the vectors cancel out, giving a value close to 1; in an open pocket they point one way and the value is close to 0.

#PolarAtoms

Number of pocket atoms with an absolute partial charge between 0.3e and 0.7e.

#ChargedAtoms

Number of pocket atoms with an absolute partial charge greater than 0.7e.

Residues

Space-separated list of residue IDs that form the pocket.

Atoms

(Optional) Space-separated list of atom indices belonging to the pocket. Only included when the --write-atoms flag is used.