Online tutorial

Foundations of protein structure

Principles of protein architecture and function

Drawings of different protein structures

Time to complete:

> 3 hours

This course includes:

  • Activities
  • Quizzes

Written by:

Last reviewed:

March 2026


Creative Commons

All materials are free cultural works licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license, except where further licensing details are provided.


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Proteins are the primary functional molecules of the cell, translating genetic information into biological function. This course provides a comprehensive introduction to the principles of protein architecture, from the chemical properties of amino acids to the assembly of multi-subunit complexes.

Feedback and help

Who is this course for?

This tutorial is aimed at researchers, undergraduates, and clinicians who would like to use protein structures for their research, but do not know how to achieve this in practice. The content of this course provides an understanding of the fundamental concepts of protein structural biology, including protein composition, folding, architecture, dynamics, and interactions. Throughout the course, there may be terms used you are unfamiliar with. If so, please review the Glossary of terms for help.

This training module has been developed in collaboration with the Australian BioCommons and the Australian Structural Biology Computing community.

What will I achieve?

By the end of the course you will be able to:

  • Describe the properties of amino acids, the peptide bond, and primary protein structure
  • Explain how sequence relates to secondary protein structure, including alpha helixes and beta sheets
  • Understand the forces that underpin these structures, and that protein structure impacts function (i.e. structure = function)
  • Describe protein tertiary structure, including motifs, domains, and folds
  • Explain how proteins fold and how their sequence can be modified post-translation
  • Understand quaternary protein structure, and that proteins don’t work alone
  • Describe why proteins are dynamic and flexible, and how this impacts function
  • Explain protein-protein interactions, ligand-protein binding, and binding sites

DOI: TOL.foundations-protein-structure-t.2026.00001.1