HSP90(heat shock protein 90)是一种重要的分子伴侣蛋白,负责客户蛋白的激活和成熟。靶向HSP90可通过竞争性占据ATP位点或者干扰HSP90与共伴侣蛋白之间的蛋白互作位点,进而有效抑制癌细胞增殖。因此,HSP90的位点识别与功能的研究对于...HSP90(heat shock protein 90)是一种重要的分子伴侣蛋白,负责客户蛋白的激活和成熟。靶向HSP90可通过竞争性占据ATP位点或者干扰HSP90与共伴侣蛋白之间的蛋白互作位点,进而有效抑制癌细胞增殖。因此,HSP90的位点识别与功能的研究对于分子发现至关重要。本研究聚焦于多肽P1,揭示了其与HSP90之间的双重结合机制,P1能够同时作用于HSP90的ATP结合位点和共伴侣蛋白CDC37(cell division cycle 37)结合界面。通过ATPase实验和Co-IP实验,发现P1具有同时抑制ATP的活性和HSP90-CDC37之间的蛋白互作的能力,这为靶向HSP90伴侣系统的新型抑制剂提供了新思路。展开更多
Multifunctional catalysts that integrate high efficiency hydrogen evolution reaction(HER), oxygen evolution reaction(OER) and oxygen reduction reaction(ORR) catalytic activity in a single material are attractive for u...Multifunctional catalysts that integrate high efficiency hydrogen evolution reaction(HER), oxygen evolution reaction(OER) and oxygen reduction reaction(ORR) catalytic activity in a single material are attractive for unitized regenerative fuel cells and overall water splitting technologies. As the best-known HER and ORR electrocatalysts, Pt and its alloys have only moderate OER activity. Ruthenium and iridium oxides exhibit the highest OER activities but not as active as Pt for HER and ORR. Here, we proposed a general principle for achieving trifunctional electrocatalysis for three reactions in a single material. Using the newly-synthesized pyrazine-modified graphdiyne(PR-GDY) as an example, we demonstrated that the synergistic effect of the pyridinic nitrogen and anchored transition-metal(TM) single atoms renders highly-efficient HER/OER/ORR trifunctional electrocatalytic activity. For the Ni-doped PR-GDY, the overpotentials for HER, OER and ORR can be respectively as low as -0.05, 0.29 and 0.38 V, which are comparable or even superior to the best-known single-functional and bi-functional precious electrocatalysts.These computational results offer not only a promising trifunctional electrocatalyst but also a strategy for the design of multifunctional electrocatalysts.展开更多
基金supported by the Basic Research Project of Natural Science Foundation of Shandong Province(ZR2018ZB0751)the National Natural Science Foundation of China(11774201)the Taishan Scholar Program of Shandong Province。
文摘Multifunctional catalysts that integrate high efficiency hydrogen evolution reaction(HER), oxygen evolution reaction(OER) and oxygen reduction reaction(ORR) catalytic activity in a single material are attractive for unitized regenerative fuel cells and overall water splitting technologies. As the best-known HER and ORR electrocatalysts, Pt and its alloys have only moderate OER activity. Ruthenium and iridium oxides exhibit the highest OER activities but not as active as Pt for HER and ORR. Here, we proposed a general principle for achieving trifunctional electrocatalysis for three reactions in a single material. Using the newly-synthesized pyrazine-modified graphdiyne(PR-GDY) as an example, we demonstrated that the synergistic effect of the pyridinic nitrogen and anchored transition-metal(TM) single atoms renders highly-efficient HER/OER/ORR trifunctional electrocatalytic activity. For the Ni-doped PR-GDY, the overpotentials for HER, OER and ORR can be respectively as low as -0.05, 0.29 and 0.38 V, which are comparable or even superior to the best-known single-functional and bi-functional precious electrocatalysts.These computational results offer not only a promising trifunctional electrocatalyst but also a strategy for the design of multifunctional electrocatalysts.
