Preliminary crystallographic investigations of recombinant GDP-4-keto-6-deoxy-D-mannose epimerase/reductase from E. coli.
The GDP-4-keto-6-deoxy-D-mannose epimerase/reductase (GM_ER) isolated from E. coli has been overexpressed as a GST-fusion protein and purified to homogeneity. The enzyme, an NADP+(H)-binding homodimer of 70 kDa, is responsible for the production of GDP-L-fucose. GM_ER shows significant structural homology to the human erythrocyte protein FX, which is involved in blood-group glycoconjugate biosynthesis, displaying 3,5 epimerase/reductase activity on GDP-4-keto-6-deoxy-D-mannose. GM_ER has been crystallized in a trigonal crystalline form, containing one molecule per asymmetric unit, suitable for high-resolution crystallographic investigations.
Tonetti
M
M
Istituto Policattedra di Chimica Biologica, Universita' di Genova, Viale Benedetto XV, 1. I-16132 Genova, Italy.
Rizzi
M
M
Vigevani
P
P
Sturla
L
L
Bisso
A
A
De Flora
A
A
Bolognesi
M
M
D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000737:chemistry* / Q000302:isolation & purification; D002238:Carbohydrate Epimerases / Q000737:chemistry* / Q000302:isolation & purification; D003460:Crystallization; D018360:Crystallography, X-Ray; D004926:Escherichia coli / Q000201:enzymology*; D029968:Escherichia coli Proteins; D006801:Humans; D007658:Ketone Oxidoreductases; D008969:Molecular Sequence Data; D009097:Multienzyme Complexes; D011487:Protein Conformation; D011993:Recombinant Fusion Proteins / Q000737:chemistry / Q000302:isolation & purification; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid; D013401:Sugar Alcohol Dehydrogenases / Q000737:chemistry* / Q000302:isolation & purification
D001426:Bacterial Proteins; D029968:Escherichia coli Proteins; D009097:Multienzyme Complexes; D011993:Recombinant Fusion Proteins; C110682:wcaG protein, E coli; D013401:Sugar Alcohol Dehydrogenases; D007658:Ketone Oxidoreductases; D002238:Carbohydrate Epimerases