Abstract
Four aryl-phospho-β-d-glucosidases were identified in Bacillus subtilis by using 4-methylumbelliferyl-phospho-β-d-glucopyranoside as a substrate. Two of these enzymes are the products of the bglA and bglH genes, previously suggested to encode aryl-phospho-β-d-glucosidases, while the other enzymes are encoded by the yckE and ydhP genes. Together, these four genes account for >99.9% of the glucosidase activity in B. subtilis on aryl-phospho-β-d-glucosides. yckE was expressed at a low and constant level during growth, sporulation, and spore germination, and was not induced by aryl-β-d-glucosides. ydhP was also not induced by aryl-β-d-glucosides. However, while ydhP was expressed at only a very low level in exponential-phase cells and germinating spores, this gene was expressed at a higher levels upon entry into the stationary phase of growth. Strains lacking yckE or ydhP exhibited no defects in growth, sporulation, or spore germination or in growth on aryl-β-d-glucosides. However, a strain lacking bglA, bglH and yckE grew poorly if at all on aryl-β-d-glucosides as the sole carbon source.
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Abbreviations
- MU :
-
4-Methylumbelliferone
- MUG :
-
4-Methylumbelliferyl-β-d-glucopyranoside
- MUGal :
-
4-Methylumbelliferyl-β-d-galactopyranoside
- MUG-P :
-
4-Methylumbelliferyl-β-d-glucopyranoside-6-phosphate
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Acknowledgements
This work was supported by contracts from the 3M Corporation. We are grateful to A. Aronson for the gift of strain JZ30 and to Kasia Koziol-Dube for assistance with some experiments.
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Setlow, B., Cabrera-Hernandez, A., Cabrera-Martinez, R.M. et al. Identification of aryl-phospho-β-d-glucosidases in Bacillus subtilis . Arch Microbiol 181, 60–67 (2004). https://doi.org/10.1007/s00203-003-0628-2
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DOI: https://doi.org/10.1007/s00203-003-0628-2