Using BFO (Basic Formal Ontology) as its upper-level ontology, the Ontology for Genetic Interval (OGI) represents gene as an entity with its 3D shape, topography, and primary DNA sequence as the foundation for its 3D structure. There is no official homepage for this resource, and it is not currently in active development. However, the maintainer has described it as available for use via BioPortal and OBO Foundry.
dna molecular structure nucleic acid sequence