Bellina Bruno, Merthe Daniel J, Kresin Vitaly V
Department of Physics and Astronomy, University of Southern California, Los Angeles, California 90089-0484, USA.
J Chem Phys. 2015 Mar 21;142(11):114306. doi: 10.1063/1.4914902.
We used cold helium droplets as nano-scale reactors to form and ionize, by electron bombardment and charge transfer, aromatic amino acid heterodimers of histidine with tryptophan, methyl-tryptophan, and indole. The molecular interaction occurring through an N-H···N hydrogen bond leads to a proton transfer from the indole group of tryptophan to the imidazole group of histidine in a radical cationic environment.
我们使用冷氦滴作为纳米级反应器，通过电子轰击和电荷转移来形成并电离组氨酸与色氨酸、甲基色氨酸和吲哚的芳香族氨基酸异二聚体。通过N-H···N氢键发生的分子相互作用导致在自由基阳离子环境中质子从色氨酸的吲哚基团转移到组氨酸的咪唑基团。
