2. Academic Validation
  3. A basal body microtubule singlet-to-doublet transition in Plasmodium male gametogenesis

A basal body microtubule singlet-to-doublet transition in Plasmodium male gametogenesis

  • Nat Commun. 2025 Oct 15;16(1):9150. doi: 10.1038/s41467-025-64158-8.
Shuzhen Yang # 1,  Shanshan Ma # 2,  Chengxian Yuan # 1,  Zhixun Li 2,  Fanbiao Ji 1,  Luming Yao 1,  Huiting Cui 3,  Qiang Guo 4 5,  Jing Yuan 6
Affiliations

Affiliations

  • 1 State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China.
  • 2 State Key Laboratory of Membrane Biology, Peking-Tsinghua Center for Life Sciences, Academy for Advanced Interdisciplinary Studies, School of Life Sciences, Peking University, Beijing, China.
  • 3 State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China. [email protected].
  • 4 State Key Laboratory of Membrane Biology, Peking-Tsinghua Center for Life Sciences, Academy for Advanced Interdisciplinary Studies, School of Life Sciences, Peking University, Beijing, China. [email protected].
  • 5 Changping Laboratory, Beijing, China. [email protected].
  • 6 State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China. [email protected].
  • # Contributed equally.
PMID: 41093827 DOI: 10.1038/s41467-025-64158-8
Abstract

Axoneme assembly constitutes a pivotal process in male gametogenesis of Plasmodium. Plasmodium possesses a unique nuclear envelope-anchored basal body that templates axoneme assembly, distinct from the basal body that templates the axoneme of cilia or flagella to protrude from the cell surface. In the canonical basal body, the microtubule (MT) triplet extends and forms the axonemal MT doublet. However, this characteristic MT triplet has not been detected in Plasmodium. Indeed, the MT organization and the mechanism underlying the axonemal MT doublet assembly remain elusive in Plasmodium. Here we utilize high-resolution imaging methods including iterative ultrastructure expansion microscopy (iU-ExM) and cryo-electron tomography (cryo-ET) to resolve the native MT organization in the basal body of male gametes from the rodent malaria Parasite P. yoelii. The Parasite exhibits an MT singlet-to-doublet transition, distinct from the canonical MT triplet-to-doublet transition. Furthermore, we reveal that δ-Tubulin and ε-Tubulin are expressed in male gametocytes and regulate axoneme formation during male gametogenesis. δ-Tubulin is localized at the proximal end of the MT B-tubule and modulates B-tubule assembly of MT doublet. Our work provides the native architecture of MT singlet-to-doublet transition and reveals the key role of δ-Tubulin and ε-Tubulin in MT singlet-to-doublet transition in the basal body of Plasmodium.

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