Preliminary analysis of somatic small non-synonymous variants v1.1
|Participant name||D.O.B||Gender||NHS number||Laboratory sample ID||GeL participant ID||GMC||Sample date||Date analysis issued|
|Tumour type||Tumour subtype||ICD10 code||Sample type||Reported tumour content||Tumour sample cross-contamination|
Domain 1 variants
Variants in a virtual panel of potentially actionable genes*. Actionable genes are defined as genes in which small variants (SNVs and indels <50bp) have reported therapeutic, prognostic or clinical trial associations**, as defined by the GenomOncology Knowledge Management System. Where known, the “variant-level actionability” category and applicable tumour type are indicated. For other variants in these genes, their impact on gene function has not yet been characterised and therefore their actionability status is unclear. This means:
(i) local evaluation will be required for listed variants which are not yet characterised (i.e. “variant-level actionability” is denoted N/A)
(ii) even if well characterised as actionable for some tumour types, the listed variants may not be actionable in the participant’s specific tumour type
*Current potentially actionable genes for solid tumours: 77 genes, listed at Actionable genes in solid tumour v1.1
**Links are provided to clinical trials within the United Kingdom which are both actively recruiting participants or closed to recruitment.
Domain 2 variants
Variants in a virtual panel of cancer-related genes***. Cancer-related genes are defined as genes in which any variants have been causally implicated in cancer, as defined by the Cancer Gene Census (Wellcome Trust Sanger Instiute)
***Current cancer-related genes: 590 genes, listed at Cancer census genes v1.1 document
|Transcript||cDNA and protein change||Predicted consequences||Population germline allele frequency (1KG)||VAF||Alt allele/total read depth||COSMIC ID||Gene mode of action|
|ENST00000262367||c.3370-4dupT||splice_region_variant||N/A||0.2||12/61||N/A||oncogene, tumour suppressor|
|missense_variant||N/A||0.28||28/99||COSM1054196 COSM1054194||tumour suppressor|
Domain 3 variants
Small variants in genes not included in domains 1 & 2. These are not included in this document but are accessible via the Supplementary Analysis.
Sequencing quality information
See online Technical Information v1.1.main document and/or LabKey QC portal for details and expected ranges of QC metrics
|Sample type||Mapped reads, %||Chimeric DNA fragments, %||Insert size median, bp||Genome-wide coverage mean, x||Unevenness of local genome coverage, x||COSMIC content with low coverage (<30x), %||Total somatic SNVs||Total somatic indels||Total somatic SVs|
- The pathways for sample processing and data analysis are not yet accredited end-to-end for diagnostic use. Accordingly, any result intended for use in informing clinical management should be confirmed using a test accredited for clinical use.
- Sensitivity: the depth of WGS used in this analysis will detect 99% of SNVs with an allele frequency of ≥0.3, 95% of SNVs with an allele frequency of ≥0.1 and 60% of indels with an allele frequency of ≥0.4 (estimate is based upon admixtures analysis of a highly accurate catalog of variants produced in the “platinum genomes” project). Consequently, variants with allelic frequencies below this level, or in areas of low coverage may not be detected. False negative results cannot be excluded.
- Somatic calls are filtered according to the quality and quantity of reads. Full details of the filters used in this analysis can be found in the Technical Information v1.1.main.
- Variants present in the germline are subtracted to produce a list of somatic variants. Accordingly, variants detected in both the germline and the tumour will not be listed in this analysis.
- In this analysis MNVs (multiple nucleotide variants) are reported as multiple consecutive SNVs and therefore the protein change may require correction.
- Only variants with specific consequences (transcript ablation, splice acceptor variant, splice donor variant, stop gained, frameshift variant, stop lost, initiator codon variant, transcript amplification, inframe insertion, inframe deletion, missense variant, splice region variant, incomplete terminal codon variant) in canonical transcripts are reported. The complete list of canonical transcripts can be accessed at List of canonical transcripts v1.1.
- A variant may have multiple entries in COSMIC database due to the use of different reference sequences. In these cases links to all COSMIC entries are provided.
- Structural variants (SVs) and copy number variants (CNVs) are not included in this analysis. These variants types are included in the Supplementary Analysis.
- For a full description of the methods used to produce these results and for further information regarding QC metrics please refer to the Technical Information v1.1.main. All related documentation is available at Genomics England Website.
- ‘N/A’ indicates that information is not available or not applicable.
Queen Mary University of London
Illumina Laboratory Services United Kingdom – Hinxton
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