+検索条件
-Structure paper
| タイトル | In-cell structure and variability of pyrenoid Rubisco. |
|---|---|
| ジャーナル・号・ページ | Nat Commun, Vol. 16, Issue 1, Page 7763, Year 2025 |
| 掲載日 | 2025年8月20日 |
著者 | Nadav Elad / Zhen Hou / Maud Dumoux / Alireza Ramezani / Juan R Perilla / Peijun Zhang / ![]() |
| PubMed 要旨 | Ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) is central to global CO fixation. In eukaryotic algae, its catalytic efficiency is enhanced through the pyrenoid - a protein-dense ...Ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) is central to global CO fixation. In eukaryotic algae, its catalytic efficiency is enhanced through the pyrenoid - a protein-dense organelle within the chloroplast that concentrates CO. Although Rubisco structure has been extensively studied in vitro, its native structure, dynamics and interactions within the pyrenoid remain elusive. Here, we present the native Rubisco structure inside the green alga Chlamydomonas reinhardtii determined by cryo-electron tomography and subtomogram averaging of cryo-focused ion beam milled cells. Multiple structural subsets of Rubisco are identified, stochastically distributed throughout the pyrenoid. While Rubisco adopts an active conformation in the best-resolved map, comparison among the subsets reveals significant local variations at the active site, at the large subunit dimer interfaces, and at binding protein contact regions. These findings offer a comprehensive understanding of the structure, dynamics, and functional organization of native Rubisco within the pyrenoid, providing valuable insights into its critical role in CO fixation. |
リンク | Nat Commun / PubMed:40835820 / PubMed Central |
| 手法 | EM (サブトモグラム平均) |
| 解像度 | 8.1 Å |
| 構造データ | EMDB-52438, PDB-9hvm: |
| 由来 |
|
キーワード | PHOTOSYNTHESIS / chloroplast / pyrenoid / cryo-ET / cryo-FIB / subtomogram averaging |
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