BM214 Workshop 2: Sequence Searching

Author

Leighton Pritchard and Morgan Feeney

Published

March 1, 2024

Preface to 2023-24 BM214 Workshop 2: Sequence Searching

Welcome to the BM214 (Being a Biomolecular Scientist 2) workshop on sequence searching in bioinformatics, for 2023-24.

This year is the first presentation of the workshop material in this format, and we would be very grateful to hear feedback by email or through the GitHub repository Issues page.

Overview

This workshop asks you to search for biological sequences similar to a query sequence that you provide, using public sequence databases and common bioinformatics research tools.

Important Note

There is new material in this workshop that is not covered in lectures, and this material is examinable. Please take care to reach the text in the expandable callout boxes, as well as that for the workshop activities, to be sure you have understood the topic and obtain full value from the exercises.

Learning Objectives

By the end of this workshop, students will be able to:

  • Explain the implications of sequence similarity for taxonomic and functional relatedness
  • Use common bioinformatics tools, such as BLAST, to identify matches to a query sequence
  • Interpret the output of common bioinformatics sequence search tools
  • Compare, and make informed biological judgements between, the outputs from searches using different tools and databases

Assessment

The workshop is not formally assessed although, as noted, all the material contained in the workshop is examinable. Three scenarios for using sequence search tools are presented for you to work through. Each scenario comprises an section to establish that you are able to use the bioinformatics tool (with associated MyPlace formative quiz), and an additional set of stretch activities designed to introduce you to more advanced uses of these tools.

Important

There are four formative assessments - one for each scenario, and one for the pairwise sequence alignment exercises - of short answer questions on MyPlace which you should complete as part of the workshop.