popeve-variant-predictor-agent

name	popeve-variant-predictor-agent
description	AI-powered genetic variant pathogenicity prediction using PopEVE deep learning model for population-aware disease variant identification and rare disease diagnosis.

PopEVE Variant Predictor Agent

The PopEVE Variant Predictor Agent leverages the PopEVE deep learning model from Harvard Medical School to predict pathogenicity of genetic variants. PopEVE analyzes evolutionary conservation, protein structure, and population frequency to identify disease-causing variants, having identified over 100 previously unrecognized variants responsible for undiagnosed rare genetic diseases.

When to Use This Skill

• When predicting pathogenicity of missense variants genome-wide.
• For rare disease diagnosis with variants of uncertain significance (VUS).
• To prioritize candidate variants in exome/genome sequencing.
• When interpreting novel variants not in ClinVar or literature.
• For population-stratified variant interpretation.

Core Capabilities

1. Pathogenicity Prediction: Score any missense variant for disease likelihood.

2. VUS Resolution: Reclassify variants of uncertain significance.

3. Rare Disease Diagnosis: Identify causal variants in undiagnosed patients.

4. Population-Aware Scoring: Account for ancestry-specific variant frequencies.

5. Protein Context Analysis: Integrate structural and functional domains.

6. Batch Variant Scoring: Process thousands of variants efficiently.

Model Architecture

Component	Description	Data Source
Evolutionary Module	Deep sequence alignment	UniRef90, 250M seqs
Structural Module	AlphaFold2 structures	200M+ structures
Population Module	gnomAD frequencies	800K+ individuals
Clinical Module	ClinVar training	100K+ classifications
Integration	Multi-task neural network	Combined features

Scoring Thresholds

PopEVE Score	Interpretation	Suggested Action
> 0.9	Likely Pathogenic	High priority
0.7 - 0.9	Possibly Pathogenic	Review carefully
0.3 - 0.7	Uncertain	Additional evidence needed
0.1 - 0.3	Possibly Benign	Lower priority
< 0.1	Likely Benign	Deprioritize

Workflow

1. Input: VCF file, gene list, or individual variants.

2. Annotation: Map variants to transcripts and proteins.

3. Feature Extraction: Compute evolutionary, structural, population features.

4. Prediction: Run PopEVE model for pathogenicity scores.

5. Population Adjustment: Apply ancestry-specific calibration.

6. Ranking: Prioritize variants by score and gene relevance.

7. Output: Scored variants with interpretations.

Example Usage

User: "Score all missense variants from this rare disease patient's exome to identify potential causal variants."

Agent Action:

python3 Skills/Genomics/PopEVE_Variant_Predictor_Agent/popeve_predict.py \
    --vcf patient_exome.vcf \
    --genome GRCh38 \
    --ancestry EUR \
    --gene_panel rare_disease_genes.txt \
    --min_score 0.5 \
    --output pathogenicity_scores.tsv

Input Formats

Format	Description	Example
VCF	Standard variant calls	patient.vcf.gz
TSV	Simple variant list	chr, pos, ref, alt
HGVS	Protein notation	NP_000546.1:p.Arg248Gln
Gene + Position	Gene-centric	TP53:R248Q

Output Components

Column	Description
Variant	Genomic/protein notation
PopEVE_Score	0-1 pathogenicity score
Classification	Benign/VUS/Pathogenic
Confidence	Prediction confidence
EVE_Score	Evolutionary component
Structure_Score	Structural impact
Population_AF	Population frequency
Gene	Affected gene
Domain	Protein domain affected
ClinVar	Existing classification if any

Comparison with Other Tools

Tool	PopEVE Advantage
SIFT/PolyPhen	More accurate, deep learning
CADD	Population-aware, less bias
REVEL	Better rare variant handling
AlphaMissense	Complimentary; can ensemble
ClinVar	Scores novel variants

AI/ML Components

Deep Learning Architecture:

• Transformer for sequence context
• Graph neural network for structure
• Variational autoencoder for evolution
• Gradient boosting for integration

Training Strategy:

• Semi-supervised with ClinVar labels
• Evolutionary likelihood (unsupervised)
• Population frequency calibration
• Cross-validation across genes

Population Modeling:

• Ancestry-specific allele frequencies
• Selection coefficient estimation
• Demographic history modeling

Performance Metrics

Metric	PopEVE	AlphaMissense	REVEL
AUROC (ClinVar)	0.95	0.94	0.92
AUROC (DMS)	0.89	0.90	0.85
VUS Resolution	45%	40%	35%
Cross-ancestry	0.93	0.91	0.88

Prerequisites

• Python 3.10+
• PyTorch, transformers
• PopEVE model weights
• Reference genome (GRCh37/38)
• VEP or similar annotator
• gnomAD database access

Related Skills

• AlphaMissense_Agent - For AlphaMissense predictions
• DiagAI_Agent - For clinical diagnosis support
• ACMG_Classifier_Agent - For ACMG classification
• Pharmacogenomics_Agent - For drug-gene variants

Disease Categories

Category	Example Genes	PopEVE Performance
Cardiomyopathy	MYH7, MYBPC3	Excellent
Neurological	SCN1A, KCNQ2	Excellent
Cancer Predisposition	BRCA1, TP53	Good-Excellent
Metabolic	PAH, CFTR	Good
Immunodeficiency	BTK, WAS	Good

Special Considerations

1. Gene Coverage: Best for well-conserved genes with orthologs
2. Protein-Coding Only: Missense variants in coding regions
3. Novel Genes: Lower confidence for poorly characterized genes
4. Ancestry Calibration: Use appropriate population reference
5. Ensemble Approach: Combine with AlphaMissense for best results

Clinical Integration

Step	Action
1	Run PopEVE on all coding variants
2	Filter by phenotype-relevant genes
3	Rank by PopEVE score
4	Review top candidates
5	Apply ACMG criteria with PopEVE as evidence
6	Validate with functional studies if available

Author

AI Group - Biomedical AI Platform