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# UniProt Sequence Feature Annotation Starter
Use this skill to fetch a UniProtKB accession from the official UniProt REST API and summarize its sequence features into compact JSON.
## What it does
- Calls `https://rest.uniprot.org/uniprotkb/{accession}.json`.
- Extracts accession, entry ID, protein name, gene names, organism metadata, sequence length, and annotation score.
- Collapses large feature payloads into stable type counts plus a small set of representative sequence features.
## When to use it
- You need a lightweight starter for protein sequence-feature annotation.
- You want a deterministic UniProt-backed summary for downstream proteomics or protein biology workflows.
## Example
```bash
python3 skills/proteomics/uniprot-sequence-feature-annotation-starter/scripts/fetch_uniprot_sequence_feature_summary.py \
--accession P04637 \
--out scratch/uniprot/p04637_sequence_features.json
```
## Verification
- Skill-local tests: `python3 -m unittest discover -s skills/proteomics/uniprot-sequence-feature-annotation-starter/tests -p 'test_*.py'`
- Canonical example: `python3 skills/proteomics/uniprot-sequence-feature-annotation-starter/scripts/fetch_uniprot_sequence_feature_summary.py --accession P04637`
