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Structural and functional analysis of somatic coding and UTR indels in breast and lung cancer genomes
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Structural and functional analysis of somatic coding and UTR indels in breast and lung cancer genomes
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Journal Article
Structural and functional analysis of somatic coding and UTR indels in breast and lung cancer genomes
2021
Overview
Insertions and deletions (Indels) represent one of the major variation types in the human genome and have been implicated in diseases including cancer. To study the features of somatic indels in different cancer genomes, we investigated the indels from two large samples of cancer types: invasive breast carcinoma (BRCA) and lung adenocarcinoma (LUAD). Besides mapping somatic indels in both coding and untranslated regions (UTRs) from the cancer whole exome sequences, we investigated the overlap between these indels and transcription factor binding sites (TFBSs), the key elements for regulation of gene expression that have been found in both coding and non-coding sequences. Compared to the germline indels in healthy genomes, somatic indels contain more coding indels with higher than expected frame-shift (FS) indels in cancer genomes. LUAD has a higher ratio of deletions and higher coding and FS indel rates than BRCA. More importantly, these somatic indels in cancer genomes tend to locate in sequences with important functions, which can affect the core secondary structures of proteins and have a bigger overlap with predicted TFBSs in coding regions than the germline indels. The somatic CDS indels are also enriched in highly conserved nucleotides when compared with germline CDS indels.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ Adenocarcinoma of Lung - genetics
/ Adenocarcinoma of Lung - metabolism
/ Breast Neoplasms - metabolism
/ Cancer
/ Female
/ Gene Expression Regulation, Neoplastic
/ Genomes
/ Humanities and Social Sciences
/ Humans
/ Open Reading Frames - genetics
/ Science
/ Structure-function relationships
