jaspar-database
JASPAR Database
Overview
JASPAR is a curated, open-access database of transcription factor (TF) binding profiles represented as position frequency matrices (PFMs). The 2024 release contains 1,209 profiles in the CORE vertebrate collection, covering 783 TFs with experimentally validated binding data from SELEX, ChIP-seq, and PBM experiments. Access is free via the JASPAR REST API at https://jaspar.elixir.no/api/v1/ — no authentication required — and through the pyJASPAR Python library for matrix retrieval and manipulation.
When to Use
- Looking up the PWM or PFM for a specific TF by name (e.g., CTCF, SP1, GATA1) to use as motif input for a scanning tool
- Retrieving all JASPAR profiles for a species (e.g., Homo sapiens, Mus musculus) to build a motif library for enrichment analysis
- Scanning a DNA promoter sequence for predicted TF binding sites using a known PWM
- Finding all TFs of a given structural class (bHLH, zinc finger, homeodomain) to build a TF family binding profile set
- Getting metadata for a JASPAR matrix: number of binding sites, information content, GC content, experiment type
- Downloading complete JASPAR collection sets (CORE, UNVALIDATED, CNE) in JASPAR or MEME format for batch analysis
- Use
homer-motif-analysisinstead when you need de novo motif discovery from ChIP-seq peaks; JASPAR is for retrieving known matrices - For regulatory element annotations tied to a genomic region use
encode-databaseorregulomedb-database
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