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Evidence for two structural genes for alkaline phosphatase in Bacillus subtilis
F M Hulett1, C Bookstein, K Jensen
1Laboratory for Molecular Biology, University of Illinois, Chicago 60680.
Journal of Bacteriology
|February 1, 1990
Summary
Researchers purified two alkaline phosphatases from Bacillus subtilis, finding differences in their structure and properties. Southern analysis suggests B. subtilis has two alkaline phosphatase genes.
Area of Science:
- Biochemistry
- Molecular Biology
- Microbiology
Background:
- Alkaline phosphatases (ALPs) are crucial enzymes involved in various biological processes.
- Understanding the diversity and genetic basis of ALPs in bacteria like Bacillus subtilis is important.
Purpose of the Study:
- To purify and characterize secreted alkaline phosphatase proteins from Bacillus subtilis.
- To investigate the structural and functional differences between these enzymes.
- To determine the genetic basis for alkaline phosphatase production in B. subtilis.
Main Methods:
- Protein purification from bacterial cultures.
- Analysis of subunit molecular weight, substrate specificity, and charge characteristics.
- Amino acid sequencing and comparison with known ALP structures.
- Southern blot analysis of genomic DNA.
Main Results:
- Two distinct alkaline phosphatase proteins were isolated from Bacillus subtilis.
- The proteins exhibited variations in molecular weight, substrate specificity, and charge.
- Amino acid sequence analysis revealed conserved structural features with other ALPs.
- Evidence suggests the presence of two distinct structural genes encoding alkaline phosphatases in B. subtilis.
Conclusions:
- Bacillus subtilis produces at least two unique secreted alkaline phosphatases.
- These enzymes possess distinct biochemical properties and structural features.
- The genome of B. subtilis likely contains two genes responsible for alkaline phosphatase synthesis.