Table of Contents
Exercise 6
Data description
Working plan
We have several candidate profiles of mutations to explore:
How many variants do you detect for each scenario?
A. Individual filters
- Recessive heritage
- Dominant heritage (father is affected).
- For this region: 1:10000-500000
- Evaluate these regions at the same time: 1:10000-500000, 11:1000-500000, 13:500-100000
- For theses genes: CELA2A,CELA2B,CEP104
- Are there variants for these SNPs: rs6682385,rs75478250,rs147502335,rs368140013,rs7951297?
- Description of variants. How many SNVs, INDELs, MNVs, SVs, CNVs?
- Variants with MAF (Minimum Allelic Frequency) < 0.001 for all populations in 1000 Genomes phase 1
- Variants with MAF (Minimum Allelic Frequency) < 0.001 for all populations in 1000 Genomes phase 3
- Variants with MAF (Minimum Allelic Frequency) < 0.001 for European American population in ESP 6500
B. Progressive selection
- We have several clues about our candidate variants. In addition of knowing the pattern of recessive heritage, we search variants with MAF < 0.1 (for all populations in 1000 Genomes phase 3) because it is a rare disease. Consequence type must be “missense_variant”
- How many variants do you have including both characteristics?
- Download these final results in a csv file
- We have several clues about our candidate variants. In addition of knowing the pattern of dominant heritage (father is affected), we search variants with MAF < 0.1 (for all populations in 1000 Genomes phase 3) because it is a rare disease. Consequence type must be “missense_variant”
- How many variants do you have including both characteristics?
- Download these final results in a csv file
Solutions
A. Individual filters
- Candidate variants: 917
- Candidate variants: 1085
- Candidate variants: 5
- Candidate variants: 62
- Candidate variants: 20
- Candidate variants: 5
- 36320 SNVs, 3620 INDELs, 17 MNVs, 3 SVs, 0 CNVs
- Candidate variants in 1000 Genomes, phase 1: 11275
- Candidate variants in 1000 Genomes, phase 3: 12212
- Candidate variants in European American population: 21330
B. Progressive selection
- 917 → 299 → 29
- 1085 → 528 → 88