Redesigning Aldolase Stereoselectivity by Homologous Grafting

The 2-deoxy-d-ribose-5-phosphate aldolase (DERA) offers access to highly desirable building blocks for organic synthesis by catalyzing a stereoselective C-C bond formation between acetaldehyde and certain electrophilic aldehydes. DERA´s potential is particularly highlighted by the ability to catalyz...

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Veröffentlicht in:PloS one 2016-06, Vol.11 (6), p.e0156525-e0156525
Hauptverfasser: Bisterfeld, Carolin, Classen, Thomas, Küberl, Irene, Henßen, Birgit, Metz, Alexander, Gohlke, Holger, Pietruszka, Jörg
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container_issue 6
container_start_page e0156525
container_title PloS one
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creator Bisterfeld, Carolin
Classen, Thomas
Küberl, Irene
Henßen, Birgit
Metz, Alexander
Gohlke, Holger
Pietruszka, Jörg
description The 2-deoxy-d-ribose-5-phosphate aldolase (DERA) offers access to highly desirable building blocks for organic synthesis by catalyzing a stereoselective C-C bond formation between acetaldehyde and certain electrophilic aldehydes. DERA´s potential is particularly highlighted by the ability to catalyze sequential, highly enantioselective aldol reactions. However, its synthetic use is limited by the absence of an enantiocomplementary enzyme. Here, we introduce the concept of homologous grafting to identify stereoselectivity-determining amino acid positions in DERA. We identified such positions by structural analysis of the homologous aldolases 2-keto-3-deoxy-6-phosphogluconate aldolase (KDPG) and the enantiocomplementary enzyme 2-keto-3-deoxy-6-phosphogalactonate aldolase (KDPGal). Mutation of these positions led to a slightly inversed enantiopreference of both aldolases to the same extent. By transferring these sequence motifs onto DERA we achieved the intended change in enantioselectivity.
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subjects Acetaldehyde
Aldehyde-Lyases - chemistry
Aldehyde-Lyases - metabolism
Aldehydes
Aldolase
Aldolases
Amino Acid Sequence
Amino acids
Amino Acids - metabolism
Analysis
Biocatalysis
Biocatalysts
Biochemistry
Biology and Life Sciences
Carbon-carbon composites
Chemical reactions
Chemical synthesis
Chromatography
Crystal structure
D-Ribose
Enantiomers
Enzymes
Escherichia coli - enzymology
Fructose-Bisphosphate Aldolase - chemistry
Fructose-Bisphosphate Aldolase - metabolism
Grafting
Homology
Influence
Kinetics
Models, Molecular
Monosaccharides
Mutation
Pharmaceutical sciences
Phylogeny
Physical Sciences
Protein Engineering
Protein Structure, Secondary
Proteins
Pyruvates - metabolism
Research and Analysis Methods
Ribose
Stereoisomerism
Stereoselectivity
Structural analysis
Substrate Specificity
title Redesigning Aldolase Stereoselectivity by Homologous Grafting
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