Feistner G J, Beaman B L
J Bacteriol. 1987 Sep;169(9):3982-7. doi: 10.1128/jb.169.9.3982-3987.1987.
Culture filtrates of virulent Nocardia asteroides GUH-2 after growth in acetate minimal medium displayed an absorbance maximum at 320 nm. After isolation by polyamide extraction and anion chromatography, a UV-active compound with this absorbance was shown to be 2,3-dihydroxybenzoic acid (DHB) by nuclear magnetic resonance, gas chromatographic, and mass spectrometric techniques. DHB production under several culture conditions was quantified by a standard high-pressure liquid chromatography assay. Under iron deficiency conditions, N. asteroides GUH-2 excreted up to 11 mg of DHB per liter into the culture medium. No DHB was detected when N. asteroides GUH-2 was grown in an iron-rich medium. With the less virulent strain N. asteroides 10905, DHB was not found under any condition tested.
强毒星形诺卡菌GUH-2在乙酸盐基本培养基中生长后的培养滤液在320nm处有最大吸光度。通过聚酰胺萃取和阴离子色谱分离后,利用核磁共振、气相色谱和质谱技术表明,具有该吸光度的紫外线活性化合物为2,3-二羟基苯甲酸(DHB)。通过标准的高压液相色谱分析对几种培养条件下的DHB产量进行了定量。在缺铁条件下,星形诺卡菌GUH-2每升培养基中可分泌高达11mg的DHB。当星形诺卡菌GUH-2在富铁培养基中生长时,未检测到DHB。对于毒力较弱的菌株星形诺卡菌10905,在任何测试条件下均未发现DHB。