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-Structure paper
| タイトル | Structural basis for phosphorylation and allosteric regulation of bacterial glycogen phosphorylase by histidine phosphocarrier protein. |
|---|---|
| ジャーナル・号・ページ | Nat Commun, Year 2026 |
| 掲載日 | 2026年4月27日 |
著者 | Valerio Di Domenico / Jorick Franceus / Leonardo Mastrella / Emma De Beul / Adrià Alcaide-Jiménez / Francisco Paredes-Martínez / Juan Carlos Villegas-Ruiz / Elena Holden / Alejandro Delgado Rey / Cecilia D'Angelo / Javier O Cifuente / Weston B Struwe / Ricardo M Biondi / Alberto Marina / Sean R Connell / Justin L P Benesch / Patricia Casino / Christophe Colleoni / Tom Desmet / Marcelo E Guerin / ![]() |
| PubMed 要旨 | Protein phosphorylation is a universal regulatory mechanism, controlling virtually all aspects of bacterial physiology and pathogenesis, yet histidine phosphorylation remains among the least ...Protein phosphorylation is a universal regulatory mechanism, controlling virtually all aspects of bacterial physiology and pathogenesis, yet histidine phosphorylation remains among the least understood. The histidine phosphocarrier protein HPr not only drives bacterial glucose transmembrane uptake through the phosphotransferase system (PTS), but also controls key enzymes for central carbon metabolism, including glycogen phosphorylase (GP). Here we report cryoEM structures of multimeric Escherichia coli GP and their complexes with HPr. The EM maps reveal an unanticipated density at H806 of GP, consistent with histidine phosphorylation within a histidine-rich pocket at the N-terminal domain. Enzymatic assays reveal that HPr transfers a phosphoryl group to the N1 position of a histidine residue in GP. Through an integrative structural, mutational and functional approach, we uncover the molecular basis of HPr- GP selectivity and define the allosteric mechanism by which HPr regulates GP. We establish histidine phosphorylation as a mechanism of GP regulation, expanding the traditional paradigm of glycogen metabolism control in bacteria. |
リンク | Nat Commun / PubMed:42045210 |
| 手法 | EM (単粒子) |
| 解像度 | 2.06 - 3.1 Å |
| 構造データ | EMDB-54650: Unliganded dimer - bacterial EMDB-54651: Unliganded tetramer of Glycogen phosphorylase from E. coli EMDB-54658: Complexed dimer - bacterial EMDB-54663: Complexed tetramer - bacterial |
| 化合物 | ![]() ChemComp-HOH: |
| 由来 |
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キーワード | TRANSFERASE / Glycogen phosphorylase |
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