ProLIF MD Interaction Fingerprinting Skill

Note:

• Local files are not directly accessible by the server. Please upload them to the server using molclaw-file-transfer before execution.
• For PDB file inputs, it is recommended to preprocess them using molclaw-pdbfixer before execution.
• Please refer to skill molclaw-scp-server to complete tool invocation.

[!NOTE] Local files are not directly accessible by the server. Please upload them to the server using molclaw-file-transfer before execution. For PDB file inputs, it is recommended to preprocess them using molclaw-pdbfixer before execution.

Task Description

Analyze protein-ligand interaction fingerprints in molecular dynamics (MD) trajectories, with support for frame slicing and residue controls. Use this skill to evaluate whether binding patterns remain stable throughout simulation.

Routing note: This tool is the primary choice for MD trajectory interaction dynamics (multi-frame analysis). For single-structure analysis (one frame, one complex), use molclaw-interaction-visualizer instead.

Input Source Mapping

Parameter	Source Guidance
topology_path	Output topology file from MD workflow tools: e.g., protein_openmm_md, prepare_complex, prepare_protein_md, or goca_pipeline (.psf/.pdb/.prmtop)
trajectory_path	Output trajectory file from the same MD workflow tools (.dcd/.nc/.xtc)
ligand_selection	User-provided ligand selection string, for example resname LIG or resid 100-101
protein_selection	Defaults to protein; can be customized to narrow protein scope

Usage

Tool: prolif_md

Compute ProLIF fingerprints for an MD trajectory and return standardized summary metrics.
Args:
    topology_path (str): Path to the topology file (e.g., .psf, .pdb, .prmtop).
    trajectory_path (str): Path to the trajectory file to analyze.
    ligand_selection (str): Selection string identifying ligand atoms.
    protein_selection (str): Selection string for protein atoms. Default: 'protein'.
    interactions (List[str]|None): Optional interaction types to compute (e.g., Hydrophobic, HBDonor).
    count (bool): If True, compute interaction counts instead of fingerprints. Default: False.
    vicinity_cutoff (float|None): Optional distance cutoff for vicinity interactions.
    params_json (str|None): Optional JSON parameter file path for ProLIF interaction settings.
    start (int|None): Optional start frame index.
    stop (int|None): Optional stop frame index (exclusive).
    step (int|None): Optional frame stride.
    residues (List[str]|None): Optional explicit residue list to include.
    all_residues (bool): If True, include all residues in analysis. Default: False.
Return:
    status (str): 'success' or 'error'.
    msg (str): Human-readable summary or error message.
    command (str): The executed command label ('md').
    output_dir (str|None): Run-specific directory under tool_result/prolif_result.
    output_file (str|None): Path to the generated CSV file.
    n_frames (int|None): Number of processed frames.
    n_interactions (int|None): Number of interaction columns in output.
    frequent_interactions (List[dict]|None): High-frequency interactions (>30%) with keys 'interaction' and 'frequency'.
    result_summary (dict|None): Full summary dictionary from the wrapper.

How To Use prolif_md

response = await client.session.call_tool(
    "prolif_md",
    arguments={
        "topology_path": "relative/path/to/system.prmtop",
        "trajectory_path": "relative/path/to/md_prod.nc",
        "ligand_selection": "resname LIG",
        "protein_selection": "protein",
        "interactions": ["Hydrophobic", "HBDonor"],
        "start": 0,
        "stop": 100,
        "step": 2
    }
)
result = client.parse_result(response)
key_output = result["output_file"]

Example Parameter Sets

# 1) Main mode
{
    "topology_path": "relative/path/to/system.prmtop",
    "trajectory_path": "relative/path/to/md_prod.nc",
    "ligand_selection": "resname LIG",
    "protein_selection": "protein",
    "interactions": ["Hydrophobic", "HBDonor", "HBAcceptor"],
    "start": 0,
    "stop": 100,
    "step": 2
}

# 2) Variant mode
{
    "topology_path": "relative/path/to/system.prmtop",
    "trajectory_path": "relative/path/to/md_prod.nc",
    "ligand_selection": "resname LIG",
    "count": True,
    "all_residues": True,
    "vicinity_cutoff": 4.5,
    "params_json": "relative/path/to/prolif_params.json"
}