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-Structure paper
タイトル | Cryo-EM structure supports a role of AQP7 as a junction protein. |
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ジャーナル・号・ページ | Nat Commun, Vol. 14, Issue 1, Page 600, Year 2023 |
掲載日 | 2023年2月3日 |
著者 | Peng Huang / Raminta Venskutonytė / Rashmi B Prasad / Hamidreza Ardalani / Sofia W de Maré / Xiao Fan / Ping Li / Peter Spégel / Nieng Yan / Pontus Gourdon / Isabella Artner / Karin Lindkvist-Petersson / |
PubMed 要旨 | Aquaglyceroporin 7 (AQP7) facilitates glycerol flux across the plasma membrane with a critical physiological role linked to metabolism, obesity, and associated diseases. Here, we present the single- ...Aquaglyceroporin 7 (AQP7) facilitates glycerol flux across the plasma membrane with a critical physiological role linked to metabolism, obesity, and associated diseases. Here, we present the single-particle cryo-EM structure of AQP7 determined at 2.55 Å resolution adopting two adhering tetramers, stabilized by extracellularly exposed loops, in a configuration like that of the well-characterized interaction of AQP0 tetramers. The central pore, in-between the four monomers, displays well-defined densities restricted by two leucine filters. Gas chromatography mass spectrometry (GC/MS) results show that the AQP7 sample contains glycerol 3-phosphate (Gro3P), which is compatible with the identified features in the central pore. AQP7 is shown to be highly expressed in human pancreatic α- and β- cells suggesting that the identified AQP7 octamer assembly, in addition to its function as glycerol channel, may serve as junction proteins within the endocrine pancreas. |
リンク | Nat Commun / PubMed:36737436 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 2.55 - 3.0 Å |
構造データ | EMDB-15527, PDB-8amw: EMDB-15528, PDB-8amx: |
化合物 | ChemComp-GOL: ChemComp-HOH: |
由来 |
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キーワード | MEMBRANE PROTEIN / membrane channel / octamer / adhesion protein / junction protein |