---
license: cc-by-4.0
task_categories:
  - tabular-classification
language:
  - en
tags:
  - biology
  - genomics
  - clinical-genetics
  - missense-variants
  - loss-of-function
  - gain-of-function
  - variant-effect-prediction
  - benchmark
  - precision-medicine
size_categories:
  - 100K<n<1M
---

# GLOF: A large-scale expert-curated benchmark of missense variant functional effects

GLOF (Gain and Loss Of Function) is a benchmark dataset of **112,399 missense variants** across **2,809 human genes**, each classified as **LOF** (loss-of-function), **GOF** (gain-of-function), or **Neutral** by board-certified clinical geneticists.

## Dataset Description

The dataset was curated at [Mendelics Analise Genomica](https://www.mendelics.com/), one of Latin America's largest clinical genomics laboratories. The annotation process integrated ClinVar pathogenicity classifications, published functional studies, established gene-disease relationships, and expert clinical judgment following ACMG/AMP guidelines.

- **Pathogenic variants** were sourced from ClinVar (July 2023 release) and cross-referenced against the March 2026 release; variants with reclassified or conflicting evidence were excluded.
- **Neutral variants** were drawn from gnomAD v3.1 and validated against v4.1 allele frequencies, selecting missense variants with AF > 1%.

## Dataset Schema

| Field | Type | Description |
|-------|------|-------------|
| VARIANTKEY | String | Unique variant identifier: `chr-position-ref-alt` (GRCh38) |
| LABEL | String | Functional classification: `Neutral`, `LOF`, or `GOF` |
| ENSG | String | Ensembl gene identifier |
| GENE_SYMBOL | String | HGNC gene symbol |
| AA_POSITION | Integer | Amino acid substitution position in the canonical protein |
| PROTEIN_REF | Character | Reference (wild-type) amino acid |
| PROTEIN_ALT | Character | Alternate (mutant) amino acid |

## Class Distribution

| Class | Variants | Percentage | Genes |
|-------|----------|------------|-------|
| Neutral | 83,902 | 74.6% | 2,749 |
| LOF | 25,368 | 22.6% | 2,020 |
| GOF | 3,129 | 2.8% | 260 |

## Usage

```python
from datasets import load_dataset

dataset = load_dataset("victormaricato/glof")
```

## License

This dataset is released under the [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/) license.