Microbial Degradation of Amino Acid-Containing Compounds Using the Microcystin-Degrading Bacterial Strain B-9
作者:Haiyan Jin、Yoshiko Hiraoka、Yurie Okuma、Elisabete Hashimoto、Miki Kurita、Andrea Anas、Hitoshi Uemura、Kiyomi Tsuji、Ken-Ichi Harada
DOI:10.3390/md16020050
日期:——
expected, the tested compounds with amide and ester bonds, such as 3,4-dimethyl hippuric acid and 4-benzyl aspartate, were readily hydrolyzed by strain B-9, although the sulfonamides remained unchanged. The ester compounds were characteristically and rapidly hydrolyzed as soon as they came into contact with strain B-9. Furthermore, the degradation of amide and ester compounds with amino acids was not inhibited
B-9菌株与微孢子菌鞘氨醇单胞菌Y2菌株具有99%的相似性,是革兰氏阴性细菌,具有用于降解与微囊藻毒素相关的化合物和结核菌素的潜力。我们试图扩大菌株B-9的应用范围,并将其应用于真菌产生的霉菌毒素。在测试的霉菌毒素中,只有曲霉毒素A完全水解以提供曲霉毒素α和1-苯基丙氨酸的成分,而伏马毒素B1的水平在96小时后逐渐降低。但是,尽管使用释放到水生环境中的抗生素等药物使用菌株B-9进行了微生物降解,但并未发生降解。这些结果表明,菌株B-9只能降解含氨基酸的化合物。如所预期的,具有酰胺键和酯键(例如3)的受试化合物 尽管磺酰胺保持不变,但是菌株B-9容易水解4-二甲基马尿酸和4-苄基天冬氨酸。酯化合物一旦与菌株B-9接触,便立即进行特征性和快速水解。此外,通过加入乙二胺四乙酸(EDTA)不会抑制酰胺和酯化合物与氨基酸的降解,这表明负责的酶不是MlrC。这些结果表明,菌株B-9具有另外的水解酶和酯