Burmese python (Python bivittatus)
The Burmese python is one of the largest snakes in the world, reaching length up to 23 feet (7 meters)! Read more about Burmese pythons in National Geographic.
ID 24610235 Copr. Oxilixo | Dreamstime.com
Chromosome-length genome assembly
Download the Python_molurus_bivittatus-5.0.2_HiC.fasta.gz file containing the chromosome-length (2n=36) assembly of the burmese python genome. All modifications with respect to the draft (see below) are annotated in the Python_molurus_bivittatus-5.0.2_HiC.assembly file. Some basic stats associated with the new reference, Python_molurus_bivittatus-5.0.2_HiC, are listed below. The full data release can be explored here.
Contig length (bp) | Number of contigs | Contig N50 (bp) | Longest contig (bp) |
|---|---|---|---|
1,384,532,810 | 274,617 | 10,643 | 103,905 |
Scaffold length (bp) | Number of scaffolds | Scaffold N50 (bp) | Longest scaffold (bp) |
|---|---|---|---|
1,440,184,814 | 29,190 | 196,651,090 | 317,910,269 |
Draft
The chromosome-length genome assembly is based on the draft assembly Python_molurus_bivittatus-5.0.2 (GCA_000186305.2), credited below.
Castoe, Todd A., A. P. Jason de Koning, Kathryn T. Hall, Daren C. Card, Drew R. Schield, Matthew K. Fujita, Robert P. Ruggiero, et al. 2013. "The Burmese Python Genome Reveals the Molecular Basis for Extreme Adaptation in Snakes." Proceedings of the National Academy of Sciences of the United States of America 110 (51): 20645-50. https://doi.org/10.1073/pnas.1314475110.
Method
3D Assembly was performed using 3D-DNA pipeline (Dudchenko et al., Science, 2017). The genome was reviewed using Juicebox Assembly Tools (Dudchenko et al., bioRxiv, 2018). See Methods for more information.
Hi-C sample
The blood sample for in situ Hi-C preparation was donated by a female individual, and provided to us by SeaWorld.
Hi-C Contact maps
Hi-C data was aligned to the draft reference using Juicer (Durand, Shamim et al., Cell Systems, 2016), and contact maps visualizing the alignments with respect to the draft and the new reference were built using 3D-DNA (Dudchenko et al., Science, 2017). The contact maps can be explored below via Juicebox.js interactive tool (Robinson et al., Cell Systems, 2018). To explore the assembly in greater detail, please download the .hic and .assembly files from the data release folder and use Juicebox Assembly Tools (Dudchenko et al., bioRxiv, 2018).
References
If you use this genome assembly in your research, please check that the conditions of use associated with the draft permit it, and acknowledge the following work.
Castoe, Todd A., A. P. Jason de Koning, Kathryn T. Hall, Daren C. Card, Drew R. Schield, Matthew K. Fujita, Robert P. Ruggiero, et al. 2013. "The Burmese Python Genome Reveals the Molecular Basis for Extreme Adaptation in Snakes." Proceedings of the National Academy of Sciences of the United States of America 110 (51): 20645-50. https://doi.org/10.1073/pnas.1314475110.
Dudchenko, O., Batra, S.S., Omer, A.D., Nyquist, S.K., Hoeger, M., Durand, N.C., Shamim, M.S., Machol, I., Lander, E.S., Aiden, A.P., Aiden, E.L., 2017. De novo assembly of the Aedes aegypti genome using Hi-C yields chromosome-length scaffolds. Science 356, 92–95. https://doi.org/10.1126/science.aal3327.
Dudchenko, O., Shamim, M.S., Batra, S., Durand, N.C., Musial, N.T., Mostofa, R., Pham, M., Hilaire, B.G.S., Yao, W., Stamenova, E., Hoeger, M., Nyquist, S.K., Korchina, V., Pletch, K., Flanagan, J.P., Tomaszewicz, A., McAloose, D., Estrada, C.P., Novak, B.J., Omer, A.D., Aiden, E.L., 2018. The Juicebox Assembly Tools module facilitates de novo assembly of mammalian genomes with chromosome-length scaffolds for under $1000. bioRxiv 254797. https://doi.org/10.1101/254797.
Disclaimer
This is a work in progress. If you notice any discrepancies in the map or have data that confirms or contradicts the suggested reference, please email us at thednazoo@gmail.com or leave a comment on the Forum.