Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 132, Issue 33, Pages 11753-11758Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja104412a
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Funding
- BBSRC
- BBSRC [BB/E020704/1] Funding Source: UKRI
- Biotechnology and Biological Sciences Research Council [BB/E020704/1] Funding Source: researchfish
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2-Keto-3-deoxygluconate aldolase from the hyperthermophile Sulfolobus solfataricus is a highly thermostable type I aldolase that can catalyze carbon-carbon bond formation using nonphosphorylated substrates. However, it exhibits poor diastereocontrol in many of its aldol reactions, including the reaction of its natural substrates, pyruvate and D-glyceraldehyde, which afford a 55:45 mixture of D-2-keto-3-deoxygluconate (D-KDGlu) and D-2-keto-3-deoxy-galactonate (D-KDGal). We have employed detailed X-ray crystallographic structural information of this aldolase bound to these diastereoisomeric aldol products to selectively target specific amino acids for mutation for the rapid creation of stereochemically complementary mutants that catalyze either (Re)- or (Si)-facial selective aldol reactions to afford either D-KDGlu or D-KDGal with good levels of diastereocontrol.
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