Abstract
Aspartate kinase (AK) from Thermus thermophilus, which catalyzes the first step of threonine and methionine biosynthesis, is regulated via feedback inhibition by the end product threonine. To elucidate the mechanism of regulation of AK, the regulatory subunit (the beta subunit of T. thermophilus AK) was crystallized in the presence of the inhibitor threonine. Diffraction data were collected to 2.15 A at a synchrotron source. The crystal belongs to the cubic space group P4(3)32 or P4(1)32, with unit-cell parameters a = b = c = 141.8 A.
MeSH terms
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Aspartate Kinase / antagonists & inhibitors
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Aspartate Kinase / chemistry*
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Aspartate Kinase / genetics
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Aspartate Kinase / metabolism
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Bacterial Proteins / antagonists & inhibitors
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Bacterial Proteins / chemistry*
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Bacterial Proteins / genetics
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Bacterial Proteins / metabolism
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Crystallography, X-Ray
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Protein Kinase Inhibitors / chemistry
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Protein Subunits
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Thermus thermophilus / enzymology*
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Thermus thermophilus / genetics
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Threonine / chemistry
Substances
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Bacterial Proteins
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Protein Kinase Inhibitors
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Protein Subunits
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Threonine
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Aspartate Kinase