TY - JOUR
T1 - Crystallization and preliminary X-ray analysis of human carbonic anhydrase III
AU - Duda, David M.
AU - Yoshioka, Craig
AU - Govindasamy, Lakshmanan
AU - An, Haiqian
AU - Tu, Chingkuang
AU - Silverman, David N.
AU - McKenna, Robert
N1 - Copyright:
Copyright 2005 Elsevier Science B.V., Amsterdam. All rights reserved.
PY - 2002
Y1 - 2002
N2 - Carbonic anhydrases catalyze the interconversion of carbon dioxide to bicarbonate. Human carbonic anhydrase isozyme III with a C-terminal hexahistidine tag was overexpressed in Eschericha coli, purified and crystallized. Diffraction data (93.4% completeness) were collected to 2.2 Å resolution on an in-house R-AXIS IV++ image-plate system with Osmic mirrors and a Rigaku HU-H3R CU rotating-anode generator operating at 50 kV and 100 mA. A 60° sweep of data were collected from a single crystal with a crystal-to-detector distance of 150 mm and a 0.5° oscillation angle per frame using an exposure of 60 s per frame at 293 K. The crystals were shown to conform to the Laue hexagonal crystal system P6, with unit-cell parameters a = 44.7, c = 222.5 Å and a scaling Rsym of 0.087 for 11 962 unique reflections. Using the known crystal structure of the rat form of carbonic anhydrase isozyme III, a molecular-replacement model was built. This model was used for rotation and translation searches and uniquely defined the space group as P65. Rigid-body refinement of the model was used to generate an initial phased electron-density map with an Rwork of 31.17%.
AB - Carbonic anhydrases catalyze the interconversion of carbon dioxide to bicarbonate. Human carbonic anhydrase isozyme III with a C-terminal hexahistidine tag was overexpressed in Eschericha coli, purified and crystallized. Diffraction data (93.4% completeness) were collected to 2.2 Å resolution on an in-house R-AXIS IV++ image-plate system with Osmic mirrors and a Rigaku HU-H3R CU rotating-anode generator operating at 50 kV and 100 mA. A 60° sweep of data were collected from a single crystal with a crystal-to-detector distance of 150 mm and a 0.5° oscillation angle per frame using an exposure of 60 s per frame at 293 K. The crystals were shown to conform to the Laue hexagonal crystal system P6, with unit-cell parameters a = 44.7, c = 222.5 Å and a scaling Rsym of 0.087 for 11 962 unique reflections. Using the known crystal structure of the rat form of carbonic anhydrase isozyme III, a molecular-replacement model was built. This model was used for rotation and translation searches and uniquely defined the space group as P65. Rigid-body refinement of the model was used to generate an initial phased electron-density map with an Rwork of 31.17%.
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U2 - 10.1107/S0907444902003700
DO - 10.1107/S0907444902003700
M3 - Article
C2 - 11976500
AN - SCOPUS:0036014794
SN - 0907-4449
VL - 58
SP - 849
EP - 852
JO - Acta Crystallographica Section D: Biological Crystallography
JF - Acta Crystallographica Section D: Biological Crystallography
IS - 5
ER -