varVAMP

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Design degenerated primers on highly variable alignments for full genome sequencing or qPCR. Specifically developed for viruses.

varVAMP 최신버젼 다운로드

최종 버전 다운로드 (.zip)

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**var**iable **V**irus**AMP**licons (varVAMP) is a tool to design primers for highly diverse viruses. The input is an alignment of your viral (full-genome) sequences.

# varVAMP
[![language](https://img.shields.io/badge/python-%3E3.9-green)](https://www.python.org/)
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For a lot of virus genera it is difficult to design pan-specific primers. varVAMP solves this by introducing ambiguous characters into primers and minimizes mismatches at the 3' end. Primers might not work for some sequences of your input alignment but should recognize the large majority.

**varVAMP comes in three different flavors:**

**SINGLE**: varVAMP searches for the very best primers and reports back non-overlapping amplicons which can be used for PCR-based screening approaches.

**TILED**: varVAMP uses a graph based approach to design overlapping amplicons that tile the entire viral genome. This designs amplicons that are suitable for Oxford Nanopore or Illumina based full-genome sequencing.

**QPCR**: varVAMP searches for small amplicons with an optimized internal probe (TaqMan). It minimizes temperature differences between the primers and checks for amplicon secondary structures.

# Documentation

* [Installation](https://github.com/jonas-fuchs/varVAMP/blob/master/docs/installation.md)
* [Preparing the data](https://github.com/jonas-fuchs/varVAMP/blob/master/docs/preparing_the_data.md)
* [Usage](https://github.com/jonas-fuchs/varVAMP/blob/master/docs/usage.md)
* [Output](https://github.com/jonas-fuchs/varVAMP/blob/master/docs/output.md)
* [Wet-lab protocol](https://github.com/jonas-fuchs/varVAMP/blob/master/docs/wet_lab_protocol.md)
* [How it works](https://github.com/jonas-fuchs/varVAMP/blob/master/docs/how_varvamp_works.md)
* [FAQ](https://github.com/jonas-fuchs/varVAMP/blob/master/docs/FAQ.md)

# Already established primer schemes

We, in collaboration with specialists for the respective viruses, have already designed and wet-lab evaluated primer schemes for various viral pathogens. All the input data and varVAMP outputs are freely available [here](https://github.com/jonas-fuchs/ViralPrimerSchemes).

Moreover, varVAMP primers are now available at [primerschemes](https://labs.primalscheme.com/). varVAMP now reports primer bed files in ARTICv3 format. Feel free to contribute newly designed schemes via this [Github repository of the QuickLab](https://github.com/quick-lab/primerschemes). Use [primal-page](https://github.com/ChrisgKent/primal-page) developed by [Chris Kent](https://github.com/ChrisgKent) to generate data for compatible pull-requests.

# Citing varVAMP

varVAMP has been published in Nature Communication. If you use this software, please cite:

[Fuchs, J., Kleine, J., Schemmerer, M. et al. varVAMP: degenerate primer design for tiled full genome sequencing and qPCR. Nat Commun 16, 5067 (2025).](https://doi.org/10.1038/s41467-025-60175-9)

---

**Important disclaimer:**
*For the primer design, varVAMP uses [primer3](https://pypi.org/project/primer3-py/) to check if digested kmers of a sequence are potential primers. Some of the functions for this were adapted from [primalscheme](https://github.com/aresti/primalscheme) and I do not claim credit.*

*The remaing code is under the GPLv3 licence. The code is WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.*

varVAMP

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