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  • Title: Effects of inactivation or overexpression of the sspF gene on properties of Bacillus subtilis spores.
    Author: Loshon CA, Kraus P, Setlow B, Setlow P.
    Journal: J Bacteriol; 1997 Jan; 179(1):272-5. PubMed ID: 8982008.
    Abstract:
    Inactivation of the Bacillus subtilis sspF gene had no effect on sporulation, spore resistance, or germination in a wild-type strain or one lacking DNA protective alpha/beta-type small, acid-soluble proteins (SASP). Overexpression of SspF in wild-type spores or in spores lacking major alpha/beta-type SASP (alpha- beta- spores) had no effect on sporulation but slowed spore outgrowth and restored a small amount of UV and heat resistance to alpha- beta- spores. In vitro analyses showed that SspF is a DNA binding protein and is cleaved by the SASP-specific protease (GPR) at a site similar to that cleaved in alpha/beta-type SASP. SspF was also degraded during spore germination and outgrowth, and this degradation was initiated by GPR.
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