hiAnnotator

hiAnnotator annotates GRanges objects in R/Bioconductor by mapping custom annotation sets to genomic intervals to assign functional annotations to genomic features.

Key Features:

• Annotation Functionality: Provides functions to overlay custom annotations onto GRanges genomic intervals, including features such as genes and CpG islands.
• GRanges Object Handling: Operates on two GRanges objects (query and subject) that must share common sequence names (e.g., chromosomes) to enable precise alignment and annotation.
• High-throughput Genomics: Supports annotation of high-throughput genomics datasets represented as GRanges objects.
• Interoperability with Bioconductor: Integrates within the Bioconductor ecosystem and uses Bioconductor data structures and packages in the R environment.

Scientific Applications:

• Genomic Research: Enables annotation-driven analyses such as gene expression interpretation, epigenetic modification mapping, and comparative genomics.
• Custom Annotation Sets: Allows researchers to define and apply bespoke annotation sets tailored to specific experimental or analytical needs.

Methodology:

Aligns rows from the query GRanges object with rows in the subject GRanges object based on shared sequence names and genomic coordinates, then retrieves and associates relevant annotations for each matching region.