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  • Title: Small heat shock proteins, IbpA and IbpB, are involved in resistances to heat and superoxide stresses in Escherichia coli.
    Author: Kitagawa M, Matsumura Y, Tsuchido T.
    Journal: FEMS Microbiol Lett; 2000 Mar 15; 184(2):165-71. PubMed ID: 10713416.
    Abstract:
    To investigate the function of Escherichia coli small heat shock proteins, IbpA and IbpB, we constructed ibpA-, ibpB- and ibpAB-overexpressing strains and also an ibpAB-disrupted strain. The ibpA-, ibpB- and ibpAB-overexpressing strains were found to be resistant not only to heat but also to superoxide stress. However, the ibpAB-disrupted strain was not more sensitive to these stresses than the wild-type strain. The heat sensitivity of a rpoH amber mutant was partially suppressed by the overexpression of plac::ibpAB. These results suggest that IbpA and IbpB may be involved in the resistances to heat and oxidative stress.
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