The pangenome of the human fungal pathogen Cryptococcus neoformans reveals that subtelomeres are hotspots for gene content variation

Accessory gene content in Cryptococcus neoformans is enriched in subtelomeric regions, with 6.2% of ortholog groups varying across 383 isolates spanning VNI, VNII, VNBI, and VNBII.

• Why it matters: Limited knowledge of gene-content variation across molecular types leaves uncertainty about how genomic diversity may contribute to biology and pathogenesis in advanced HIV disease.
• What they did: The study built a C. neoformans pangenome from de novo assembly and annotation of short-read Illumina data, defining 6,564 ortholog groups from reference strain H99 and validating classifications with long-read assemblies.
• The result: Many accessory genes are molecular-type specific and poorly conserved within the species yet similar to related Cryptococcaceae, suggesting horizontal gene transfer and implicating subtelomeres as hotspots for gene content variation.