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Crystallization and preliminary X‐ray diffraction analysis of l,l‐diaminopimelate aminotransferase (DapL) from Chlamydomonas reinhardtii

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In the anabolic synthesis of diaminopimelate and lysine in plants and in some bacteria, the enzyme l,l‐diaminopimelate aminotransferase (DapL; EC 2.6.1.83) catalyzes the conversion of tetrahydrodipicolinic acid (THDPA) to l,l‐diaminopimelate, bypassing the DapD, DapC and DapE enzymatic steps in the bacterial acyl pathways. Here, the cloning, expression, purification, crystallization and preliminary X‐ray diffraction analysis of DapL from the alga Chlamydomonas reinhardtii are presented. Protein crystals were grown in conditions containing 25%(w/v) PEG 3350 and 200 mM lithium sulfate and initially diffracted to ∼1.35 Å resolution. They belonged to space group P212121, with unit‐cell parameters a = 58.9, b = 91.8, c = 162.9 Å. The data were processed to 1.55 Å resolution with an R merge of 0.081, an R p.i.m. of 0.044, an R r.i.m of 0.093 and a V M of 2.28 Å3 Da−1.
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Keywords: Chlamydomonas reinhardtii; algaecides; l,l‐diaminopimelate aminotransferase; lysine biosynthesis

Document Type: Research Article

Publication date: January 1, 2011

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