Structure of Burkholderia Cepacia Udp-Glucose Dehydrogenase (Ugd) Bcec and Role of Tyr10 in Final Hydrolysis of Ugd Thioester Intermediate.

Cloning, Expression, Purification, Crystallization and Preliminary Crystallographic Studies of Bcec, a Udp-Glucose Dehydrogenase from Burkholderia Cepacia Ist408.

HHHHHHGSMNLTIIGSGSVGLVTGACLADIGHDVFCLDVDQAKIDILNNGGVPIHEPGLKEVIARNRSAGRLRFSTDIEA
AVAHGDVQFIAVGTPPDEDGSADLQYVLAAARNIGRYMTGFKVIVDKSTVPVGTAERVRAAVAEELAKRGGDQMFSVVSN
PEFLKEGAAVDDFTRPDRIVIGCDDDVPGERARELMKKLYAPFNRNHERTLYMDVRSAEFTKYAANAMLATRISFMNELA
NLADRFGADIEAVRRGIGSDPRIGYHFLYAGCGYGGSCFPKDVEALIRTADEHGQSLQILKAVSSVNATQKRVLADKIVA
RFGEDLTGRTFAIWGLAFKPNTDDMREAPSRELIAELLSRGARIAAYDPVAQEEARRVIALDLADHPSWLERLSFVDDEA
QAARDADALVIVTEWKIFKSPDFVALGRLWKTPVIFDGRNLYEPETMSEQGIEYHPIGRPGSRQAVAARVTGTAPASA

AT 293 K UPON VAPOR DIFFUSION OF SITTING DROPS OF 1 MICRO-LITER PROTEIN SOLUTION (5 MG/ML PROTEIN, 25 MM TRIS-HCL PH 8.3, 50 MM NACL, 2.5 MM DTT, 0.25 MM UDP-GLCA, AND 0.5 MM OXIDIZED NAD), AND 1 MICRO-LITER WELL SOLUTION (200 MM AMMONIUM SULFATE, 100 MM SODIUM ACETATE PH 4.5, 11-14 % (W/V) PEG 4K, AND 50 MM NAF), EQUILIBRATED AGAINST 500 MICRO-LITER PRECIPITATION SOLUTION IN THE WELL.

BCEC AND THE FINAL STEP OF UGDS REACTION

ENGINEERED RESIDUE IN CHAIN A, TYR 10 TO SER ENGINEERED RESIDUE IN CHAIN B, TYR 10 TO SER ENGINEERED RESIDUE IN CHAIN C, TYR 10 TO SER ENGINEERED RESIDUE IN CHAIN D, TYR 10 TO SER
CRYSTALLIZED BCEC_Y10S ALSO CONTAINS ADDITIONAL N-TERMINAL TAG HHHHHHGS

NATIVE BCEC, PDB ENTRY 2Y0E ,WITH TYR 10 TRUNCATED TO ALA.

(CHAIN A AND RESID 304:456) OR (CHAIN A AND RESID 1501)

(CHAIN B AND RESID 304:456) OR (CHAIN B AND RESID 1501)

(CHAIN C AND RESID 304:456) OR (CHAIN C AND RESID 1501)

(CHAIN D AND RESID 304:456) OR (CHAIN D AND RESID 1501)

OXIDOREDUCTASE, CARBOHYDRATE SYNTHESIS, EXOPOLYSACCHARIDE, CYSTIC FIBROSIS