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Updated: Feb 10, 2026

Visual and Microscopic Evaluation of Streptomyces Developmental Mutants
Published on: September 12, 2018
Expression, purification and preliminary crystallographic analysis of phosphoribosyl isomerase (PriA) from
Helena Wright1, Francisco Barona-Gómez, David A Hodgson
1Department of Biological Sciences, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, England.
Abstract:
The priA gene encoding the enzyme phosphoribosyl isomerase from Streptomyces coelicolor, a novel bifunctional enzyme involved in both histidine and tryptophan biosynthesis, was heterologously expressed and purified in Escherichia coli as an N-terminal His-tag fusion. The purified recombinant enzyme was crystallized using the hanging-drop method in 1.50 M ammonium sulfate and 100 mM sodium citrate pH 4.8. Crystals were obtained of up to 0.05 x 0.05 x 0.3 mm in size. A full data set to 2 A resolution was collected at the ESRF beamline ID14-1 and space group P3(1,2)21 was assigned, with unit-cell parameters a = 65.1, c = 104.7 A.
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