+検索条件
-Structure paper
| タイトル | In situ structure of the mouse sperm central apparatus reveals mechanistic insights into asthenozoospermia. |
|---|---|
| ジャーナル・号・ページ | Cell Res, Vol. 35, Issue 8, Page 551-567, Year 2025 |
| 掲載日 | 2025年6月5日 |
著者 | Yun Zhu / Tingting Lin / Guoliang Yin / Linhua Tai / Lianwan Chen / Jing Ma / Guoning Huang / Yi Lu / Zhiyong Zhang / Binbin Wang / Suren Chen / Fei Sun / ![]() |
| PubMed 要旨 | The central apparatus (CA) within the sperm axoneme is vital for sperm motility, yet its molecular architecture and functional mechanisms remain incompletely understood. Combining cryo-electron ...The central apparatus (CA) within the sperm axoneme is vital for sperm motility, yet its molecular architecture and functional mechanisms remain incompletely understood. Combining cryo-electron tomography and AlphaFold2, we resolved the in-cell structure of mouse sperm CA at a subnanometer resolution and built a near-complete atomic model. Our analysis identified 39 CA-associated proteins, including eight previously unreported components. By presenting the full-length structures of CFAP47 and HYDIN, we elucidate their molecular roles in tethering the C1 and C2 microtubules within the CA. Specifically, HYDIN forms a semicircular chain that encircles C1 and C2, with its N-terminal half driving the C1-C2 connection and its C-terminal half providing axial support in C2. CFAP47, the core structural component of the bridge, binds C1 through its N-terminal domains, interacts with HYDIN via its central CFAP47-ring, and anchors to C2 through its C-terminal region. The significantly reduced sperm motility and impaired CA structure observed in Cfap47-knockout mice confirmed the important role of CFAP47. Furthermore, genetic analysis of infertile Chinese men with asthenozoospermia identified previously unreported mutations in the CFAP47. The CA structural model elucidates the pathogenic mechanisms of these mutations, establishing a direct link between CFAP47 dysfunction and impaired sperm motility. Therefore, our study provides mechanistic insights into CA-related fertility disorders. |
リンク | Cell Res / PubMed:40473901 / PubMed Central |
| 手法 | EM (サブトモグラム平均) |
| 解像度 | 5.5 - 25.0 Å |
| 構造データ | ![]() EMDB-60428: C1 half of the central apparatus in mouse sperm axoneme ![]() EMDB-60429: C1a part of the central apparatus in mouse sperm axoneme ![]() EMDB-60430: C1b part of the central apparatus in mouse sperm axoneme ![]() EMDB-60431: C2 half of the central apparatus in mouse sperm axoneme ![]() EMDB-60432: C2 half of the central apparatus in mouse sperm axoneme with 8-nm repeat ![]() EMDB-60436: C2a part of the central apparatus in mouse sperm axoneme ![]() EMDB-60446: C2b part of the central apparatus in mouse sperm axoneme ![]() EMDB-60448: Cm part of the central apparatus in mouse sperm axoneme ![]() EMDB-60449: Cma1 part of the central apparatus in mouse sperm axoneme ![]() EMDB-60454: Cma2 part of the central apparatus in mouse sperm axoneme ![]() EMDB-60455: Cmb part of the central apparatus in mouse sperm axoneme ![]() EMDB-60456: consensus map of the central apparatus in mouse sperm axoneme ![]() EMDB-60597: In situ structure of the central apparatus in CFAP47-KO mouse sperm axoneme EMDB-60633, PDB-9ijj: |
| 由来 |
|
キーワード | PROTEIN TRANSPORT / microtubules / axoneme / sperm / filament |
ムービー
コントローラー
構造ビューア
万見文献について



著者
リンク















キーワード