Build a Vector-Based Sequence Catalog Cross-Contamination Screener

Convert sequence k-mer profiles into vector embeddings to detect non-target species fragments in public sequence submissions. Index reference taxa profiles in Qdrant and isolate anomalous sequence entries.

Sequence Repository Quality Manager

Read input FASTA files and decompose reads into standardized oligonucleotide k-mer frequency vectors.

Index canonical species reference profiles within Qdrant collection spaces.

Query uploaded sequence vectors against reference spaces to compute cosine similarity scores.

Produce an automated contamination triage manifest flagging outliers for biocurator inspection.

Vector similarity scatter workspace with nearest-neighbor taxon matches and manual quarantine actions.

Synthesize normalized FASTA records and obtain reference k-mers from public NCBI eukaryotic gene downloads. Starter examples below are synthetic. They are not downloaded records.

NCBI Datasets gene download Extract multi-species FASTA records using NCBI Datasets parameters (--taxon human, --include rna).

qdrant, biopython, numpy. qdrant enables vector indexing and similarity search over sequence k-mer embedding representations. Local Python vectorizer runtime without specialized neural weights.

Submit runnable source, pinned dependencies, setup commands, a working interface, example outputs, and a recorded end-to-end demo. Include tests and an action log.

Transforms FASTA nucleotide strings into normalized k-mer frequency vectors.

Indexes reference vectors into Qdrant collection and queries query sequence distances.

Identifies alien sequences that show top similarity to non-target taxon profiles.

Provides human-in-the-loop review actions to override or confirm sequence quarantine.

```json [ { "input": { "collection_name": "taxa_vectors", "target_taxon": "human", "query_sequences": [ { "id": "SEQ_01", "vector": [ 0.95, 0.05, 0 ] }, { "id": "SEQ_02", "vector": [ 0.05, 0.9, 0.05 ] } ], "reference_centroids": { "human": [ 0.92, 0.08, 0 ], "bacterial_contaminant": [ 0.08, 0.88, 0.04 ] } }, "expected_output": { "target_taxon": "human", "results": [ { "id": "SEQ_01", "matched_taxon": "human", "confidence": 0.99, "status": "approved" }, { "id": "SEQ_02", "matched_taxon": "bacterial_contaminant", "confidence": 0.98, "status": "quarantined" } ] } }, { "input": { "collection_name": "taxa_vectors", "target_taxon": "human", "query_sequences": [ { "id": "SEQ_EMPTY", "vector": [ 0, 0, 0 ] } ], "reference_centroids": { "human": [ 0.92, 0.08, 0 ] } }, "expected_output": { "target_taxon": "human", "results": [ { "id": "SEQ_EMPTY", "matched_taxon": "unassigned", "confidence": 0, "status": "flagged_error" } ] } } ] ```

Bioinformatics sequence quality control tool; operates on public or synthetic DNA sequences only. Use mock external writes. Require human review before any real deployment.