Rajaram, Venkatesan and Rajaganapathi, Jagannathan and Khan, Farida and Savithri, Handanahal S and Murthy, Mathur RN (2003) Crystallization and preliminary X-ray diffraction studies on recombinant diaminopropionate ammonia lyase from Escherichia coli. In: Acta Crystallographica Section D: Biological Crystallography, 59 (Part 9). pp. 1668-1669.
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Diaminopropionate (DAP) ammonia lyase (a PLP-dependent enzyme; EC 18.104.22.168) catalyzes the \alpha,\beta-elimination reaction of both L- and D-\alpha,\beta-diaminopropionate to form pyruvate and ammonia. Escherichia coli DAP ammonia lyase gene was cloned and overexpressed in E. coli and the protein was purified to homogeneity and crystallized using the hanging-drop vapour-diffusion technique. Crystals of two different morphologies were obtained, one of which belonged to the tetragonal space group $P4_12_12$ (or $P4_32_12$), with unit-cell parameters a = b = 86.01, c = 209.56 \AA, and the other to the monoclinic space group $P_21$, with unit-cell parameters a = 87.78, b = 94.35, c = 96.02 \AA, = 109.73°. The tetragonal crystals diffracted X-rays to 3.0 \AA resolution, while diffraction from the monoclinic form extended to 2.5 \AA. Complete X-ray diffraction data sets have been collected for both crystal forms.
|Item Type:||Journal Article|
|Additional Information:||Copyright of this article belongs to International Union of Crystallography.|
|Department/Centre:||Division of Biological Sciences > Molecular Biophysics Unit
Division of Biological Sciences > Biochemistry
|Date Deposited:||31 May 2006|
|Last Modified:||19 Sep 2010 04:28|
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