Dailey F E, Cronan J E, Maloy S R
J Bacteriol. 1987 Feb;169(2):917-9. doi: 10.1128/jb.169.2.917-919.1987.
Salmonella typhimurium LT2 normally expresses two acetohydroxy acid synthases (AHAS I and AHAS II). The function of AHAS I in this organism was unclear, since AHAS I-deficient (ilvBN) mutants of LT2 grew well on glucose or succinate minimal media, whereas AHAS II-deficient (ilvGM) mutants requried isoleucine for normal growth on glucose minimal media. We report that AHAS I-deficient mutants of S. typhimurium required isoleucine and valine for growth on acetate or oleate minimal media, whereas AHAS II-deficient mutants were able to grow on these media without isoleucine supplementation.
鼠伤寒沙门氏菌LT2通常表达两种乙酰羟酸合酶(AHAS I和AHAS II)。AHAS I在该生物体中的功能尚不清楚,因为LT2的AHAS I缺陷型(ilvBN)突变体在葡萄糖或琥珀酸盐基本培养基上生长良好,而AHAS II缺陷型(ilvGM)突变体在葡萄糖基本培养基上正常生长需要异亮氨酸。我们报告称,鼠伤寒沙门氏菌的AHAS I缺陷型突变体在乙酸盐或油酸盐基本培养基上生长需要异亮氨酸和缬氨酸,而AHAS II缺陷型突变体在不添加异亮氨酸的情况下能够在这些培养基上生长。