---
name: "pdb2pqr"
section: "1"
platform: "linux"
package: "pdb2pqr"
version: "3.6.1+dfsg-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/pdb2pqr30"
---

# pdb2pqr(1)

manual page for pdb2pqr30 3.6.1+dfsg

Part of [pdb2pqr30(1)](/pdb2pqr30/1.md).

## NAME

pdb2pqr30 - manual page for pdb2pqr30 3.6.1+dfsg

## DESCRIPTION

usage: pdb2pqr \[-h\] \[--ff {AMBER,CHARMM,PARSE,TYL06,PEOEPB,SWANSON}\]

-

  \[--userff USERFF\] \[--clean\] \[--nodebump\] \[--noopt\] \[--keep-chain\] \[--assign-only\] \[--ffout {AMBER,CHARMM,PARSE,TYL06,PEOEPB,SWANSON}\] \[--usernames USERNAMES\] \[--apbs-input APBS\_INPUT\] \[--pdb-output PDB\_OUTPUT\] \[--ligand LIGAND\] \[--whitespace\] \[--neutraln\] \[--neutralc\] \[--drop-water\] \[--include-header\] \[--titration-state-method {propka}\] \[--with-ph PH\] \[-f FILENAMES\] \[-r REFERENCE\] \[-c CHAINS\] \[-i TITRATE\_ONLY\] \[-t THERMOPHILES\] \[-a ALIGNMENT\] \[-m MUTATIONS\] \[-p PARAMETERS\] \[--log-level {DEBUG,INFO,WARNING,ERROR,CRITICAL}\] \[-o PH\] \[-w WINDOW WINDOW WINDOW\] \[-g GRID GRID GRID\] \[--mutator MUTATOR\] \[--mutator-option MUTATOR\_OPTIONS\] \[-d\] \[-l\] \[-k\] \[-q\] \[--protonate-all\] \[--version\] input\_path output\_pqr

PDB2PQR v3.6.1: biomolecular structure conversion software.

### positional arguments:

- input\_path

  Input PDB path or ID (to be retrieved from RCSB database

- output\_pqr

  Output PQR path

### options:

- **-h**, **--help**

  show this help message and exit

- **--version**

  show program's version number and exit

### Mandatory options:

-

  One of the following options must be used

- **--ff** {AMBER,CHARMM,PARSE,TYL06,PEOEPB,SWANSON}

  The forcefield to use. (default: PARSE)

- **--userff** USERFF

  The user-created forcefield file to use. Requires **--usernames** and overrides **--ff** (default: None)

- **--clean**

  Do no optimization, atom addition, or parameter assignment, just return the original PDB file in aligned format. Overrides **--ff** and **--userff** (default: False)

### General options:

- **--nodebump**

  Do not perform the debumping operation (default: True)

- **--noopt**

  Do not perform hydrogen optimization (default: True)

- **--keep-chain**

  Keep the chain ID in the output PQR file (default: False)

- **--assign-only**

  Only assign charges and radii - do not add atoms, debump, or optimize. (default: False)

- **--ffout** {AMBER,CHARMM,PARSE,TYL06,PEOEPB,SWANSON}

  Instead of using the standard canonical naming scheme for residue and atom names, use the names from the given forcefield (default: None)

- **--usernames** USERNAMES

  The user-created names file to use. Required if using **--userff** (default: None)

- **--apbs-input** APBS\_INPUT

  Create a template APBS input file based on the generated PQR file at the specified location. (default: None)

- **--pdb-output** PDB\_OUTPUT

  Create a PDB file based on input. This will be missing charges and radii (default: None)

- **--ligand** LIGAND

  Calculate the parameters for a single MOL2-format ligand at the path specified by this option. The MOL2 ligand name should match only one ligand in the PDB file. (default: None)

- **--whitespace**

  Insert whitespaces between atom name and residue name, between x and y, and between y and z. (default: False)

- **--neutraln**

  Make the N-terminus of a protein neutral (default is charged). Requires PARSE force field. (default: False)

- **--neutralc**

  Make the C-terminus of a protein neutral (default is charged). Requires PARSE force field. (default: False)

- **--drop-water**

  Drop waters before processing biomolecule. (default: False)

- **--include-header**

  Include pdb header in pqr file. WARNING: The resulting PQR file will not work with APBS versions prior to 1.5 (default: False)

### pKa options:

-

  Options for titration calculations

- **--titration-state-method** {propka}

  Method used to calculate titration states. If a titration state method is selected, titratable residue charge states will be set by the pH value supplied by **--with\_ph** (default: None)

- **--with-ph** PH

  pH values to use when applying the results of the selected pH calculation method. (default: 7.0)

### PROPKA invocation options:

- **-f** FILENAMES, **--file** FILENAMES

  read data from \<filename\>, i.e. \<filename\> is added to arguments (default: \[\])

- **-r** REFERENCE, **--reference** REFERENCE

  setting which reference to use for stability calculations \[neutral/low-pH\] (default: neutral)

- **-c** CHAINS, **--chain** CHAINS

  creating the protein with only a specified chain. Specify " " for chains without ID \[all\] (default: None)

- **-i** TITRATE\_ONLY, **--titrate\_only** TITRATE\_ONLY

  Treat only the specified residues as titratable. Value should be a comma-separated list of "chain:resnum" values; for example: **-i** "A:10,A:11" (default: None)

- **-t** THERMOPHILES, **--thermophile** THERMOPHILES

  defining a thermophile filename; usually used in 'alignment-mutations' (default: None)

- **-a** ALIGNMENT, **--alignment** ALIGNMENT

  alignment file connecting \<filename\> and \<thermophile\> \[\<thermophile\>.pir\] (default: None)

- **-m** MUTATIONS, **--mutation** MUTATIONS

  specifying mutation labels which is used to modify \<filename\> according to, e.g. N25R/N181D (default: None)

- **-p** PARAMETERS, **--parameters** PARAMETERS

  set the parameter file \[{default:s}\] (default: */usr/lib/python3/dist-packages/propka/propka.cfg*)

- **--log-level** {DEBUG,INFO,WARNING,ERROR,CRITICAL}

  logging level verbosity (default: INFO)

- **-o** PH, **--pH** PH

  setting pH-value used in e.g. stability calculations \[7.0\] (default: 7.0)

- **-w** WINDOW WINDOW WINDOW, **--window** WINDOW WINDOW WINDOW

  setting the pH-window to show e.g. stability profiles \[0.0, 14.0, 1.0\] (default: (0.0, 14.0, 1.0))

- **-g** GRID GRID GRID, **--grid** GRID GRID GRID

  setting the pH-grid to calculate e.g. stability related properties \[0.0, 14.0, 0.1\] (default: (0.0, 14.0, 0.1))

- **--mutator** MUTATOR

  setting approach for mutating \<filename\> \[alignment/scwrl/jackal\] (default: None)

- **--mutator-option** MUTATOR\_OPTIONS

  setting property for mutator \[e.g. type="side-chain"\] (default: None)

- **-d**, **--display-coupled-residues**

  Displays alternative pKa values due to coupling of titratable groups (default: False)

- **-l**, **--reuse-ligand-mol2-files**

  Reuses the ligand mol2 files allowing the user to alter ligand bond orders (default: False)

- **-k**, **--keep-protons**

  Keep protons in input file (default: False)

- **-q**, **--quiet**

  suppress non-warning messages (default: None)

- **--protonate-all**

  Protonate all atoms (will not influence pKa calculation) (default: False)
