Junta de Castilla y Leon, Consejeria de Educacion y Cultura y Fondo Social Europeo
BU263P18
スペイン
Spanish Ministry of Science, Innovation, and Universities
PID2019-111215RB-100
スペイン
Generalitat de Catalunya
2017 SGR 1192
スペイン
Spanish Ministry of Science, Innovation, and Universities
PID2020-120275GB-I00
スペイン
Spanish National Research Council
スペイン
引用
ジャーナル: Sci Adv / 年: 2023 タイトル: Plastic degradation by insect hexamerins: Near-atomic resolution structures of the polyethylene-degrading proteins from the wax worm saliva. 著者: Mercedes Spínola-Amilibia / Ramiro Illanes-Vicioso / Elena Ruiz-López / Pere Colomer-Vidal / Francisco Rodriguez-Ventura / Rosa Peces Pérez / Clemente F Arias / Tomas Torroba / Maria Solà ...著者: Mercedes Spínola-Amilibia / Ramiro Illanes-Vicioso / Elena Ruiz-López / Pere Colomer-Vidal / Francisco Rodriguez-Ventura / Rosa Peces Pérez / Clemente F Arias / Tomas Torroba / Maria Solà / Ernesto Arias-Palomo / Federica Bertocchini / 要旨: Plastic waste management is a pressing ecological, social, and economic challenge. The saliva of the lepidopteran larvae is capable of oxidizing and depolymerizing polyethylene in hours at room ...Plastic waste management is a pressing ecological, social, and economic challenge. The saliva of the lepidopteran larvae is capable of oxidizing and depolymerizing polyethylene in hours at room temperature. Here, we analyze by cryo-electron microscopy (cryo-EM) 's saliva directly from the native source. The three-dimensional reconstructions reveal that the buccal secretion is mainly composed of four hexamerins belonging to the hemocyanin/phenoloxidase family, renamed Demetra, Cibeles, Ceres, and a previously unidentified factor termed Cora. Functional assays show that this factor, as its counterparts Demetra and Ceres, is also able to oxidize and degrade polyethylene. The cryo-EM data and the x-ray analysis from purified fractions show that they self-assemble primarily into three macromolecular complexes with striking structural differences that likely modulate their activity. Overall, these results establish the ground to further explore the hexamerins' functionalities, their role in vivo, and their eventual biotechnological application.