Unveiling the structure of Leishmania flagella through cryoelectron tomography.

Leishmania flagella exhibit unique asymmetrical features and doublet-specific structures, including an additional inner-junction and 8-nm wide A2 protofilament hole, distinguishing them from other eukaryotes.

• Why it matters: Understanding the ultrastructure of Leishmania flagella is crucial because these parasites rely on motile flagella for transmission, and current treatments face resistance and toxicity issues.
• What they did: Cryoelectron tomography was used to analyze the ultrastructure of Leishmania tarentolae, revealing the 96-nm repeat, paraflagellar rod, and lineage-specific asymmetrical features.
• The result: The findings highlight lineage-specific adaptations in Leishmania flagella, emphasizing structural divergence within eukaryotes that may inform future therapeutic strategies.