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gnomad-database

Query the Genome Aggregation Database (gnomAD). Use when determining the rarity or allele frequency of specific genetic variants, retrieving gene constraint metrics (pLI, LOEUF) to assess loss-of-function intolerance, finding variants in a genomic region or gene, or querying structural variants. Don't use for analyzing individual patient genomes, tracking somatic mutations in cancer (use COSMIC), or requesting raw sequencing reads (use ENA).

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설치 방법 보기

포함된 파일(5)

  • SKILL.md3.0 KB
  • references/citation.bib5.1 KB
  • scripts/get_gene_constraint.py2.4 KB
  • scripts/get_variant_frequency.py4.2 KB
  • scripts/search_variants.py5.2 KB

SKILL.md(원문)

설치하기 전에 에이전트에게 전달되는 지시 내용을 확인할 수 있습니다.

gnomAD Database

Prerequisites

  1. uv: Read the uv skill and follow its Setup instructions to ensure uv is installed and on PATH.
  2. User Notification: If .licenses/gnomad_database_LICENSE.txt does not already exist in the workspace root directory then (1) prominently notify the user to check the terms at https://gnomad.broadinstitute.org/policies and https://gnomad.broadinstitute.org/data#api, then (2) create the file recording the notification text and timestamp.

Core Rules

  • Use the Wrapper: ALWAYS execute the provided helper scripts to query the database rather than accessing the database directly. The scripts automatically enforce the gnomAD API rate limits gracefully.
  • Notification: If this skill is used, ensure this is mentioned in the output.

Utility Scripts

All scripts are located in the scripts/ subdirectory of this skill's installation directory. When running them, use the full absolute path to the script (e.g. /path/to/gnomad_database/scripts/get_variant_frequency.py).

1. Variant Frequency. Retrieves global and ancestry-specific allele frequencies, homozygote counts, and Grpmax Filtering AF (faf95/faf99) for exome, genome, and total (exome+genome combined) data. The filtering allele frequency (FAF) is the maximum credible genetic ancestry group AF (lower bound of the 95% or 99% CI). Variant ID format must be chrom-pos-ref-alt (e.g., 1-55516888-G-GA). Alternately, you may provide an rsID.

# By variant ID:
uv run scripts/get_variant_frequency.py --variant_id {variant_id} [--dataset {dataset}] --output variant_frequency.json

# By rsID (e.g., rs1800562):
uv run scripts/get_variant_frequency.py --rsid {rsid} [--dataset {dataset}] --output variant_frequency.json

2. Gene Constraint. Retrieves constraint metrics for a gene. The response will explicitly contain pli, and the LOEUF score is represented by oe_lof_upper.

uv run scripts/get_gene_constraint.py --gene {gene_symbol} --output {gene_symbol}_constraint.json

3. Region/Gene Variant Search. Finds all variants in a region or gene.

# By region:
uv run scripts/search_variants.py --chrom {chrom} --start {start} --end {end} --output region_variants.json
# By gene:
uv run scripts/search_variants.py --gene {gene_symbol} --consequence {pLoF|missense} --output {gene_symbol}_variants.json

References

Further documentation on the data: https://gnomad.broadinstitute.org/data#api More general database documentation: https://gnomad.broadinstitute.org/help

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