Structural highlights
Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedIn bacteria, the second committed step in the diaminopimelate/lysine anabolic pathways is catalyzed by the enzyme dihydrodipicolinate reductase (DapB). DapB catalyzes the reduction of dihydrodipicolinate to yield tetrahydrodipicolinate. Here, the cloning, expression, purification, crystallization and X-ray diffraction analysis of DapB from the human-pathogenic bacterium Bartonella henselae, the causative bacterium of cat-scratch disease, are reported. Protein crystals were grown in conditions consisting of 5%(w/v) PEG 4000, 200 mM sodium acetate, 100 mM sodium citrate tribasic pH 5.5 and were shown to diffract to approximately 2.3 A resolution. They belonged to space group P4322, with unit-cell parameters a = 109.38, b = 109.38, c = 176.95 A. Rr.i.m. was 0.11, Rwork was 0.177 and Rfree was 0.208. The three-dimensional structural features of the enzymes show that DapB from B. henselae is a tetramer consisting of four identical polypeptides. In addition, the substrate NADP+ was found to be bound to one monomer, which resulted in a closed conformational change in the N-terminal domain. The crystal structure of dihydrodipicolinate reductase from the human-pathogenic bacterium Bartonella henselae strain Houston-1 at 2.3 A resolution.,Cala AR, Nadeau MT, Abendroth J, Staker BL, Reers AR, Weatherhead AW, Dobson RC, Myler PJ, Hudson AO Acta Crystallogr F Struct Biol Commun. 2016 Dec 1;72(Pt 12):885-891. Epub 2016, Nov 25. PMID:27917836[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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