Russell R R, Pittard A J
J Bacteriol. 1971 Sep;107(3):736-40. doi: 10.1128/jb.107.3.736-740.1971.
During the genetic mapping of a mutation in the pheS gene which confers temperature sensitivity on a strain of Escherichia coli K-12, an extragenic suppressor was discovered which restores ability to grow at the restrictive temperature. The suppressor, which has been named supQ, is cotransduced by bacteriophage P1 with the purE marker. SupQ does not suppress a number of amber or ochre mutations. SupQ(-) is carried by the prototrophic Hfr Hayes strain AB259, and the presence of the supQ(-) allele impairs the growth of this strain at 42 C.
在对赋予大肠杆菌K - 12菌株温度敏感性的pheS基因突变进行基因定位的过程中,发现了一种基因外抑制子,它能恢复菌株在限制温度下生长的能力。这种抑制子被命名为supQ,它与purE标记一起被噬菌体P1共转导。SupQ不能抑制许多琥珀突变或赭石突变。原养型Hfr海斯菌株AB259携带SupQ(-),supQ(-)等位基因的存在会损害该菌株在42℃时的生长。