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---
layout: default
---
A swiss army knife for manipulating and editing PDB files.
## Installation Instructions
`pdb-tools` are available on PyPi and can be installed though `pip`. This is the
recommended way as it makes updating/uninstalling rather simple:
```bash
pip install pdb-tools
```
Because we use semantic versioning in the development of `pdb-tools`, every bugfix
or new feature results in a new version of the software that is automatically published
on PyPI. As such, there is no difference between the code on github and the latest version
you can install with `pip`. To update your installation to the latest version of the code
run:
```bash
pip install --upgrade pdb-tools
```
## What can I do with them?
The purpose of each tool should be obvious from its name. In any case, [here](#list-of-tools)
is a list of all the tools in the suite and their function. All tools share the
same command-line interface. Below are a couple of examples to get you started. If you want to
check out more examples of how to use the tools and their applications, or have any cool examples
of your own, check out the [cookbook](cookbook).
* Downloading a structure
```bash
pdb_fetch 1brs > 1brs.pdb # 6 chains
pdb_fetch -biounit 1brs > 1brs.pdb # 2 chains
```
* Renumbering a structure
```bash
pdb_reres -1 1ctf.pdb > 1ctf_renumbered.pdb
```
* Selecting chain(s)
```bash
pdb_selchain -A 1brs.pdb > 1brs_A.pdb
pdb_selchain -A,D 1brs.pdb > 1brs_AD.pdb
```
* Deleting hydrogens
```bash
pdb_delelem -H 1brs.pdb > 1brs_noH.pdb
```
* Selecting backbone atoms
```bash
pdb_selatom -CA,C,N,O 1brs.pdb > 1brs_bb.pdb
```
* Selecting chains, removing HETATM, and producing a valid PDB file
```bash
pdb_selchain -A,D 1brs.pdb | pdb_delhetatm | pdb_tidy > 1brs_AD_noHET.pdb
```
*Note: On Windows the tools will have the `.exe` extension.*
## What _can't_ I do with them?
Operations that involve coordinates or numerical calculations are usually not in
the scope of `pdb-tools`. Use a proper library for that, it will be much faster
and scalable. Also, although we provide mmCIF<->PDB converters, we do not support
large mmCIF files with more than 99999 atoms, or 9999 residues in a single chain.
Our tools will complain if you try using them on such a molecule.
## About
Manipulating PDB files is often painful. Extracting a particular chain or set of
residues, renumbering residues, splitting or merging models and chains, or just
ensuring the file is conforming to the PDB specifications are examples of tasks
that can be done using any decent parsing library or graphical interface. These,
however, almost always require 1) scripting knowledge, 2) time, and 3) installing
one or more programs.
`pdb-tools` were designed to be a swiss army knife for the PDB format. The
philosophy of the scripts is simple: one script, one task. If you want to do two
things, pipe the scripts together. Requests for new scripts will be taken into
consideration - use the Issues button or write them yourself and create a Pull
Request.
## Looking for the _other_ pdb-tools?
The Harms lab maintains a set of tools also called `pdbtools`, which perform a
slightly different set of functions. You can find them [here](https://github.com/harmslab/pdbtools).
## Citation
We finally decided to write up a small publication describing the tools. If you
used them in a project that is going to be published, please cite us:
```
Rodrigues JPGLM, Teixeira JMC, Trellet M and Bonvin AMJJ.
pdb-tools: a swiss army knife for molecular structures.
F1000Research 2018, 7:1961 (https://doi.org/10.12688/f1000research.17456.1)
```
If you use a reference manager that supports BibTex, use this record:
```
@Article{ 10.12688/f1000research.17456.1,
AUTHOR = { Rodrigues, JPGLM and Teixeira, JMC and Trellet, M and Bonvin, AMJJ},
TITLE = {pdb-tools: a swiss army knife for molecular structures [version 1; peer review: 2 approved]
},
JOURNAL = {F1000Research},
VOLUME = {7},
YEAR = {2018},
NUMBER = {1961},
DOI = {10.12688/f1000research.17456.1}
}
```
## Requirements
`pdb-tools` should run on Python 2.7+ and Python 3.x. We test on Python 2.7, 3.6,
and 3.7. There are no dependencies.
## Installing from Source
Download the zip archive or clone the repository with git. We recommend the `git`
approach since it makes updating the tools extremely simple.
```bash
# To download
git clone https://github.com/haddocking/pdb-tools
cd pdb-tools
# To update
git pull origin master
# To install
python setup.py install
```
## Contributing
If you want to contribute to the development of `pdb-tools`, provide a bug fix,
or a new tools, read our `CONTRIBUTING` instructions [here](https://github.com/haddocking/pdb-tools/blob/master/CONTRIBUTING.md).
## License
`pdb-tools` are open-source and licensed under the Apache License, version 2.0.
For details, see the LICENSE file.
## List of Tools
|
