prs-pipeline
Dagster pipeline for computing PRS reference distributions from the 1000 Genomes reference panel.
Overview
This pipeline downloads the PGS Catalog 1000G reference panel (~7 GB), computes polygenic risk scores
for all 2,504 reference individuals across all PGS Catalog scores, aggregates per-superpopulation
distribution statistics, and pushes reference_distributions.parquet to HuggingFace
(just-dna-seq/prs-percentiles).
End users of just-prs automatically pull this tiny parquet via PRSCatalog.reference_distributions().
Running
cd prs-pipeline
uv run dagster dev -m prs_pipeline.definitions
Then open http://localhost:3000 in your browser.
Assets
Scoring & Distribution Pipeline
| Asset | Group | Description |
|---|---|---|
ebi_reference_panel_fingerprint |
download | HTTP fingerprint for freshness tracking of the remote reference panel |
ebi_scoring_files_fingerprint |
download | HTTP fingerprint for the remote scoring file manifest |
scoring_files |
download | Bulk-download all harmonized PGS scoring .txt.gz files from EBI FTP |
scoring_files_parquet |
compute | Convert all .txt.gz scoring files to spec-driven parquet caches (zstd-9, embedded headers). Deletes .txt.gz after verified conversion to save ~5.5 GB disk space. Tracks per-file failures in conversion_failures.parquet |
reference_panel |
download | Download + extract reference panel binary files (.pgen/.pvar/.psam) |
reference_scores |
compute | Score all PGS IDs against the reference panel via compute_reference_prs_batch() |
reference_percentile_audit |
compute | Audit cached or HuggingFace reference percentile parquets, log pass/warn/fail counts, and write/upload quality sidecars without recomputing scores |
canary_collapse_audit |
compute | Score caller-supplied --vcf canaries across the catalog (or flag cached results); push catalog flags + audit sidecar without recomputing 1000G scores |
hf_prs_percentiles |
upload | Enrich distributions with metadata and absolute risk, push to HuggingFace |
Metadata & Prevalence Pipeline
| Asset | Group | Description |
|---|---|---|
raw_pgs_metadata |
download | Download PGS Catalog bulk metadata sheets (scores, performance, evaluation, publications) |
cleaned_pgs_metadata |
compute | Clean and normalize metadata, produce parquets including publications.parquet |
gwas_studies |
download | Download GWAS Catalog bulk studies + trait mappings, parse case/control from free-text |
trait_prevalence |
compute | Merge 3-tier prevalence data (seed CSV → GWAS cohorts → PGS eval cohorts) into trait_prevalence.parquet |
hf_pgs_catalog |
upload | Push cleaned metadata + prevalence to HuggingFace |
For details on how absolute risk estimation works, see the methodology document.
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