STRUCTURAL PROTEIN / Bacterial cytoskeleton / Crystalline cellulose secretion
機能・相同性
Cellulose synthase operon protein D, bacterial / Cellulose synthase subunit D superfamily / Cellulose synthase subunit D / cellulose biosynthetic process / Cellulose biosynthesis protein
ジャーナル: Sci Adv / 年: 2022 タイトル: Bacterial crystalline cellulose secretion via a supramolecular BcsHD scaffold. 著者: Wiem Abidi / Marion Decossas / Lucía Torres-Sánchez / Lucie Puygrenier / Sylvie Létoffé / Jean-Marc Ghigo / Petya V Krasteva / 要旨: Cellulose, the most abundant biopolymer on Earth, is not only the predominant constituent of plants but also a key extracellular polysaccharide in the biofilms of many bacterial species. Depending on ...Cellulose, the most abundant biopolymer on Earth, is not only the predominant constituent of plants but also a key extracellular polysaccharide in the biofilms of many bacterial species. Depending on the producers, chemical modifications, and three-dimensional assemblies, bacterial cellulose (BC) can present diverse degrees of crystallinity. Highly ordered, or crystalline, cellulose presents great economical relevance due to its ever-growing number of biotechnological applications. Even if some acetic acid bacteria have long been identified as BC superproducers, the molecular mechanisms determining the secretion of crystalline versus amorphous cellulose remain largely unknown. Here, we present structural and mechanistic insights into the role of the accessory subunits BcsH (CcpAx) and BcsD (CesD) that determine crystalline BC secretion in the lineage. We show that oligomeric BcsH drives the assembly of BcsD into a supramolecular cytoskeletal scaffold that likely stabilizes the cellulose-extruding synthase nanoarrays through an unexpected inside-out mechanism for secretion system assembly.
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A: Cellulose biosynthesis protein G: Cellulose biosynthesis protein E: Cellulose biosynthesis protein C: Cellulose biosynthesis protein H: Cellulose biosynthesis protein B: Cellulose biosynthesis protein D: Cellulose biosynthesis protein F: Cellulose biosynthesis protein
名称: BcsD from G. hansenii / タイプ: COMPLEX 詳細: Octameric BcsD in solution. Expressed recombinantly in E. coli and purified via a cleavable N-terminal hexahistidine tag. Entity ID: #1 / 由来: RECOMBINANT