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The effects of mutational process and selection on driver mutations across cancer types

 View ORCID ProfileDaniel Temko, Ian Tomlinson, Simone Severini, Benjamin Schuster-Boeckler, Trevor Graham

doi: https://doi.org/10.1101/149096

This article is a preprint and has not been peer-reviewed [what does this mean?].

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Abstract

Epidemiological evidence has long associated environmental mutagens with increased cancer risk. However, links between specific mutation-causing processes and the acquisition of individual driver mutations have remained obscure. Here we have used public cancer sequencing data to infer the independent effects of mutation and selection on driver mutation complement. First, we detect associations between a range of mutational processes, including those linked to smoking, ageing, APOBEC and DNA mismatch repair (MMR) and the presence of key driver mutations across cancer types. Second, we quantify differential selection between well-known alternative driver mutations, including differences in selection between distinct mutant residues in the same gene. These results show that while mutational processes play a large role in determining which driver mutations are present in a cancer, the role of selection frequently dominates.

http://www.biorxiv.org/content/early/2017/06/12/149096