# Bio Clip Seq Clip Motif Analysis

> Identify enriched sequence motifs at CLIP-seq binding sites for RBP binding specificity. Use when characterizing the sequence preferences of an RNA-binding protein. Use when this capability is needed.

- Skill: `tomevault-io/bio-clip-seq-clip-motif-analysis` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add tomevault-io/bio-clip-seq-clip-motif-analysis`
- Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/bio-clip-seq-clip-motif-analysis/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: tomevault-io (https://skillmd.com/u/tomevault-io)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/tomevault-io/bio-clip-seq-clip-motif-analysis

---


## Version Compatibility

Reference examples tested with: bedtools 2.31+

Before using code patterns, verify installed versions match. If versions differ:
- CLI: `<tool> --version` then `<tool> --help` to confirm flags

If code throws ImportError, AttributeError, or TypeError, introspect the installed
package and adapt the example to match the actual API rather than retrying.

# CLIP Motif Analysis

**"Find sequence motifs at my RBP binding sites"** → Discover enriched RNA sequence motifs at CLIP-seq peaks to determine the binding specificity of an RNA-binding protein.
- CLI: `findMotifs.pl peaks.fa fasta output/ -rna` (HOMER)
- CLI: `bedtools getfasta` to extract peak sequences first

## HOMER De Novo Motifs

**Goal:** Discover enriched RNA sequence motifs at CLIP-seq binding sites.

**Approach:** Extract FASTA sequences from peak regions using bedtools getfasta, then run HOMER findMotifs.pl in RNA mode to identify overrepresented motifs.

```bash
# Extract sequences from peaks
bedtools getfasta -fi genome.fa -bed peaks.bed -fo peaks.fa

# Find enriched motifs
findMotifs.pl peaks.fa fasta output_dir \
    -len 6,7,8 \
    -rna
```

## MEME-ChIP

```bash
meme-chip -oc output_dir \
    -dna \
    peaks.fa
```

## Known Motif Enrichment

```bash
# HOMER known motif scan
findMotifs.pl peaks.fa fasta output_dir \
    -rna \
    -known
```

## Related Skills

- clip-peak-calling - Get peaks
- chip-seq/motif-analysis - General motif concepts

---
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<!-- tomevault:4.0:skill_md:2026-04-11 -->