Investigating the molecular mechanisms of GWAS signals

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17 Terms

1

How many disease-associated variants map outside protein-coding sequences?

more than 90%

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2

What are the applications of second-generation sequencing technology?

RNA seq, ChIP-seq, high-throughout chromosome conformation capture (Hi-C), chromatin accessibility profiling

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3

What does RNA-seq allow for?

detection of gene expression level, identification of new transcripts

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4

What does ChIP-seq do?

pull down DNA fragments protected by a specific protein

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5

What is step 1 of Hi-C?

formaldehyde fixation and crosslinking of chromosomal regions in close spatial proximity

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6

What is step 2 of Hi-C?

digested DNA fragments are labelled with biotin, ligated and then fragmented further by sonication

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7

What is step 3 of Hi-C?

all ligated DNA fragments are pulled-down with streptavidin beads

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8

What is step 4 of Hi-C?

sequencing to measure how frequent two genomic regions interact

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9

What is the goal of the genotype-tissue expression project?

to study human gene expression and regulation and its relationship to genetic variation in 54 tissues of ~1000 individuals

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10

What is the goal of the human cell atlas?

to create comprehensive reference maps of all human cells

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11

What does functional omics propose?

the molecular mechanisms of GWAS signals in non-coding regions

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12

What is the first purpose of functional omics?

identifying cell types and subtypes enriched with traits-associated signals at candidate cis-regulatory elements

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13

What is the second purpose of functional omics?

prioritizing candidate causal variants at disease-associated loci

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14

What is the third purpose of functional omics?

linking disease variants to putative target genes

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15

What do genetic screens reveal?

the function of genes and regulatory variants

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16

What are the common types of CRISPR screening methods?

survival, fluorescence-activated cell sorting based. arrayed, single-celled

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17

What are the CRISPR-based strategies to link GWAS-identified SNP variants to gene expression?

high-density tiling flow cytometry screens, single-cell functional genomics screen

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