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5.1.1.10: amino-acid racemase

This is an abbreviated version!
For detailed information about amino-acid racemase, go to the full flat file.

Word Map on EC 5.1.1.10

Reaction

an L-amino acid
=
a D-amino acid

Synonyms

AAR, ACL racemase, amino acid racemase, amino-acid racemase, ArgR, BAR, broad specificity amino acid racemase, broad substrate specificity amino acid racemase, broad-specificity amino acid racemase, broad-spectrum amino acid racemase, Bsar, D-amino acid racemase 1, DAR1, GkNSAAR, L-Amino acid racemase, LACBS_00576, MalY, More, N-succinylamino acid racemase, NSAR, patB, PH0138, PLP-independent amino acid racemase, Racemase, amino acid, RacX, YgeA

ECTree

     5 Isomerases
         5.1 Racemases and epimerases
             5.1.1 Acting on amino acids and derivatives
                5.1.1.10 amino-acid racemase

Purification

Purification on EC 5.1.1.10 - amino-acid racemase

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PURIFICATION (Commentary)
ORGANISM
UNIPROT
LITERATURE
both isoforms A and B
-
expression in Escherichia coli with N-terminal His-tag, purification protocol from inclusion bodies
-
His-tag is removed by thrombin cleavage
-
His6-tagged BAR is applied onto a His-Trap HP 1-ml column
-
Ni-NTA column chromatography and Sepharcryl 200 gel filtration
-
protein is purified by applying to a diethylaminoethyl sepharose fast flow column and a phenyl sepharose 6 fast flow column
-
purified in a one-step procedure by immobilized cobalt affinity chromatography
-
recombinant C-terminally His-tagged enzyme from Escherichia coli strain BL21(DE3) pLysS by nickel affinity chromatography
recombinant enzyme expressed in insect cells
-
recombinant His-tagged enzyme from Escherichia coli strain BL21 by nickel affinity chromatography and dialysis
recombinant His6-tagged wild-type and mutant enzymes from Escherichia coli strain BL21(DE3) by nickel affinity chromatography and dialysis, to homogeneity
recombinant soluble enzyme BAR from Escherichia coli strain BL21(DE3) by heat treatment at 90°C for 20 min, ammonium sulfate fractionation, and hydrophobic interaction chromatography, dialysis, anion echange chromatography, and again dialysis
two enzyme lyophilisates of different purity are obtained from which the crude is sufficient for the racemization of methionine and the pure is used for asparagine
-
using Ni-NTA chromatography