Röther Wolf, Birke Jakob, Jendrossek Dieter
Institute of Microbiology, University of Stuttgart, Stuttgart, Germany.
Bio Protoc. 2017 Mar 20;7(6):e2188. doi: 10.21769/BioProtoc.2188.
Microbial biodegradation of rubber relies on extracellular rubber oxygenases that catalyze the oxidative cleavage of the double bond of the polyisoprene backbone into oligo-isoprenoids. This protocol describes the determination of rubber oxygenase activities by an online measurement of molecular oxygen consumption via a non-invasive fluorescence-based assay. The produced oligo-isoprenoid cleavage products with terminal keto- and aldehyde-groups are identified qualitatively and quantitatively by HPLC. Our method allows for the characterization of homologue rubber oxygenases, and can likely be adapted to assay other oxygenases consuming dioxygen. Here we describe the determination of rubber oxygenase activities at the examples of the so far two known types of rubber oxygenases, namely rubber oxygenase A (RoxA) and latex clearing protein (Lcp).
橡胶的微生物生物降解依赖于细胞外橡胶加氧酶,该酶催化聚异戊二烯主链双键的氧化裂解生成低聚异戊二烯类化合物。本方案描述了通过基于非侵入性荧光测定法在线测量分子氧消耗来测定橡胶加氧酶活性的方法。通过高效液相色谱对生成的具有末端酮基和醛基的低聚异戊二烯裂解产物进行定性和定量鉴定。我们的方法可用于表征同源橡胶加氧酶,并且可能适用于检测其他消耗双氧的加氧酶。在此,我们以迄今为止已知的两种橡胶加氧酶,即橡胶加氧酶A(RoxA)和乳胶清除蛋白(Lcp)为例,描述橡胶加氧酶活性的测定方法。