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Description

Kraken2 is a well-known Next Generation Sequencing (NGS) metagenomics classification tool. It is used widely in scientific research. With kraken2 you can build a database using whole genome sequences to classify read sequences against to identify unknown samples. It is easy to use and performs very rapid sample classification. Kraken2 has application in biology, medical research and even geology.
In this video we will see a general overview of the algorithm behind the kraken2 database language. Then, we will do a hands-on example whereby we download read data sets from the SRA database from NCBI (the National Center for Biotechnology Information) and classify them against the database that we have built. We will also look at the Pavian visualization software which presents a graphical overview of our results (i.e. Stankey diagram). Figures made in this program can also be used for publication purposes.
Students of this course are mainly either biology or medical students or researchers. Some knowledge of Linux is required to take the course, but there are only few commands that need clarification, but they will be explained in detail.
In total, it is worthwhile learning the skills used in this course, which can give you the edge in metagenomics research and analysis.
Who this course is for:
students studying bioinformatics, biotechnology

What you'll learn

how to design, build and query a kraken2 database

how to classify Next Generation Sequence reads to a metagenomics database

how to visualize a classification report in Pavian

Requirements

  • You will need a copy of Adobe XD 2019 or above. A free trial can be downloaded from Adobe.
  • No previous design experience is needed.
  • No previous Adobe XD skills are needed.

Course Content

27 sections • 95 lectures
Expand All Sections
1-Introduction
10
1.1-Introduction
1.2-Installing kraken2
1.3-Kraken2 database and query input
1.4-Kraken2 database input
1.5-Search the SRA website for SARS-CoV-2 data sets
1.6-How to use sequences from outside NCBI
1.7-Find NCBI taxon id for several species
1.8-The kraken2 algorithm
1.9-Understanding the kraken2 algorithm
1.10-How many sequences to add to your database?
2-Building the SIBO kraken2 database
10
2.1-SIBO database overview
2.2-SIBO project overview
2.3-Adding genomes to the SIBO kraken2 database
2.4-Adding genomes to a kraken2 database
2.5-Other types of kraken2 databases and libraries
2.6-types of other kraken2 databases
2.7-Building the database
2.8-What is in the database? kraken2-inspect
2.9-A note on classification
2.10-How do we classify organisms?
3-Querying the database
7
3.1-Downloading SIBO data sets from the SRA database
3.2-Running a query and interpreting output
3.3-Running queries and output
3.4-Interpreting a kraken2 report
3.5-Querying the SIBO database with a Parkinson's gut sample
3.6-Visualizing results with Pavian
3.7-Pavian test quiz
4-Extra kraken2 material
4
4.1-kraken2 environmental variables
4.2-Kraken2 environmental variables
4.3-MPA style reports
4.4-Summary and Conclusion, further ideas and other metagenomics tools