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CotA of Bacillus subtilis Is a Copper-Dependent Laccase
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ABSTRACT
The spore coat protein CotA of
Bacillus subtilis
displays similarities with multicopper oxidases, including manganese oxidases and laccases.
B. subtilis
is able to oxidize manganese, but neither CotA nor other sporulation proteins are involved. We demonstrate that CotA is a laccase. Syringaldazine, a specific substrate of laccases, reacted with wild-type spores but not with Δ
cotA
spores. CotA may participate in the biosynthesis of the brown spore pigment, which appears to be a melanin-like product and to protect against UV light.
American Society for Microbiology
Title: CotA of
Bacillus subtilis
Is a Copper-Dependent Laccase
Description:
ABSTRACT
The spore coat protein CotA of
Bacillus subtilis
displays similarities with multicopper oxidases, including manganese oxidases and laccases.
B.
subtilis
is able to oxidize manganese, but neither CotA nor other sporulation proteins are involved.
We demonstrate that CotA is a laccase.
Syringaldazine, a specific substrate of laccases, reacted with wild-type spores but not with Δ
cotA
spores.
CotA may participate in the biosynthesis of the brown spore pigment, which appears to be a melanin-like product and to protect against UV light.
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