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5.1.3.7: UDP-N-acetylglucosamine 4-epimerase

This is an abbreviated version!
For detailed information about UDP-N-acetylglucosamine 4-epimerase, go to the full flat file.

Word Map on EC 5.1.3.7

Reaction

UDP-N-acetyl-alpha-D-glucosamine
=
UDP-N-acetyl-alpha-D-galactosamine

Synonyms

Epimerase, uridine diphosphoacetylglucosamine, Galactowaldenase, GalE, galE-2, GalESp2, GNE, Gne epimerase, group 3 epimerase, KfoA, More, TM0509, TMGalE, UAE, UDP acetylglucosamine epimerase, UDP-galactose 4-epimerase, UDP-galactose-4-epimerase, UDP-GalNAc 4-epimerase, UDP-Glc(NAc) 4-epimerase, UDP-GlcNAc 4-epimerase, UDP-GlcNAc epimerase, UDP-GlcNAc/Glc 4-epimerase, UDP-hexose 4-epimerase, UDP-N-acetylglucosamine 4'-epimerase, UDP-N-acetylglucosamine 4-epimerase, UDP-N-acetylglucosamine-4'-epimerase, UDP-sugar 4-epimerase, UDPGlcNAc 4-epimerase, Uridine 5'-diphospho-N-acetylglucosamine-4-epimerase, Uridine diphosphate N-acetylglucosamine-4-epimerase, Uridine diphosphoacetylglucosamine epimerase, WbgU, WbPP

ECTree

     5 Isomerases
         5.1 Racemases and epimerases
             5.1.3 Acting on carbohydrates and derivatives
                5.1.3.7 UDP-N-acetylglucosamine 4-epimerase

Engineering

Engineering on EC 5.1.3.7 - UDP-N-acetylglucosamine 4-epimerase

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PROTEIN VARIANTS
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
H305A
-
site-directed mutagenesis, structure determination and analysis, the mutant shows reduced activity with UDP-N-acetylglucosamine
S144T/H305A
-
site-directed mutagenesis, the mutant shows highly reduced activity with UDP-N-acetylglucosamine
S144T/R304G/H305A
-
site-directed mutagenesis, the mutant shows highly reduced activity with UDP-N-acetylglucosamine
S144T/R304G/H305A/S306Y
-
site-directed mutagenesis, the mutant shows no activity with either UDP-GlcNAc or UDP-Glc
S301Y
G118A/G119A
-
site-directed mutagenesis, the mutant shows highly reduced activity with UDP-N-acetylglucosamine and reduced activity with UDP-Gal, the mutant's substrate specificity is shifted toward non-acetylated substrates
G188S/G119S
-
site-directed mutagenesis, the mutant shows highly reduced activity with UDP-N-acetylglucosamine and reduced activity with UDP-Gal, the mutant's substrate specificity is shifted toward non-acetylated substrates
S116A
-
site-directed mutagenesis, the mutant shows highly reduced activity with UDP-N-acetylglucosamine and reduced activity with UDP-Gal, the mutant's substrate specificity is shifted toward non-acetylated substrates
S279Y
-
site-directed mutagenesis, the mutant shows highly reduced activity with UDP-N-acetylglucosamine and reduced activity with UDP-Gal, the mutant's substrate specificity is shifted toward non-acetylated substrates
T117S
-
site-directed mutagenesis, the mutant shows highly reduced activity with UDP-N-acetylglucosamine and reduced activity with UDP-Gal, the mutant's substrate specificity is shifted toward non-acetylated substrates
S306Y
site-directed mutagenesis, the mutation allows a switch from group 2 to group 1 and forms steric clashes between the group 3 epimerases and their substrates, which results in the observed loss of activity
A209H
A209N
G102K
G102K/Q201E
site-directed mutagenesis, as a result of the introduction of both mutations at the same time, a salt bridge is formed, which results in a rescue of the activity for acetylated substrates, probably due to restoration of the slight distortion that is observed in both single mutants
Q201E
Q201E/G102K
-
mutant enzyme shows slightly reduced epimerization activity with UDP-N-acetyl-D-glucosamine and UDP-N-acetyl-D-galactosamine, no epimerization activity with UDP-D-glucose and very limited activity with UDP-D-galactose
S143A
-
mutant enzyme shows epimerization activity with UDP-N-acetyl-D-glucosamine and UDP-N-acetyl-D-galactosamine similar to wild-type enzyme and no epimerization activity with UDP-D-glucose and UDP-D-galactose
S144K
-
mutant enzyme shows no epimerization activity with UDP-N-acetyl-D-glucosamine/UDP-N-acetyl-D-galactosamine and UDP-D-glucose/UDP-D-galactose
S306Y
C300Y
site-directed mutagenesis, the mutation results in decreased activity toward UDP-GlcNAc and UDP-GalNAc
K86G
site-directed mutagenesis, the mutation abolishes the ability of the enzyme to transform UDP-Glc/UDP-Gal completely
C300Y
Streptococcus pneumoniae ATCC BAA-334 / TIGR4
-
site-directed mutagenesis, the mutation results in decreased activity toward UDP-GlcNAc and UDP-GalNAc
-
K86G
Streptococcus pneumoniae ATCC BAA-334 / TIGR4
-
site-directed mutagenesis, the mutation abolishes the ability of the enzyme to transform UDP-Glc/UDP-Gal completely
-
additional information