Lundeen Rachel A, Janssen Elisabeth M-L, Chu Chiheng, Mcneill Kristopher
Institute of Biogeochemistry and Pollutant Dynamics ETH Zurich Universitätstrasse 16 CH-8092 Zurich, Switzerland.
Chimia (Aarau). 2014 Nov;68(11):812-7. doi: 10.2533/chimia.2014.812.
Amino acids, peptides and proteins are central building blocks of life and of key importance in the biogeochemistry of aquatic ecosystems. In sunlit surface waters, amino acid-based molecules at different levels of structural organization are susceptible to transformation by both direct photochemical reactions and indirect processes caused by photochemically produced reactive oxygen species (e.g. hydroxyl radical or singlet oxygen). Photochemical transformation processes can thereby affect the availability of these crucial nutrient sources in aquatic ecosystems, inhibit the function of microbial extracellular enzymes, or even promote the degradation of amino acid-based pollutant molecules. In this article, the environmental photochemistry of amino acids, peptides and proteins in aquatic systems is reviewed.
氨基酸、肽和蛋白质是生命的核心组成部分，在水生生态系统的生物地球化学中至关重要。在阳光照射的表层水体中，不同结构组织水平的氨基酸类分子易受直接光化学反应以及光化学产生的活性氧物种（如羟基自由基或单线态氧）引起的间接过程的影响而发生转化。光化学转化过程进而会影响水生生态系统中这些关键营养源的可利用性，抑制微生物胞外酶的功能，甚至促进氨基酸类污染物分子的降解。本文对水生系统中氨基酸、肽和蛋白质的环境光化学进行了综述。
