Research Infrastructure · Biology & Biomedical Research

SnpEff

An open-source variant annotation program that predicts gene-, transcript-, and protein-level consequences using a selected genome annotation database.

Last verified

RESEARCH USE

Where SnpEff fits

Select a SnpEff database that exactly matches the reference genome and annotation release, annotate VCF records with functional consequence fields such as ANN, and use SnpSift or another tool for subsequent filtering. Preserve the database name and version, reference FASTA, input convention, command, warnings, and output headers, and inspect representative variants against the source transcript annotation.

Research tasks

  • Predict gene-, transcript-, and protein-level variant consequences
  • Add standardized Sequence Ontology annotations to VCF records
  • Use or build organism-specific annotation databases

What to evaluate before use

  • Results depend on the reference genome, gene models, transcript selection, and database release. A mismatch can create coordinate or allele errors.
  • A predicted consequence is not evidence of clinical pathogenicity or experimental function. One variant can have several transcript-dependent consequences and requires expert interpretation.

Verification note

This entry summarizes the resource's role without assessing scientific accuracy or endorsing its outputs. Features and terms can change; consult the official source before adopting it for consequential work.

variant annotationfunctional consequences

Last verified: 2026-09-17
Source: official documentation ↗