The three-dimensional structure of chicken liver basic fatty acid-binding protein has been determined at 2.7 Å resolution by X-ray crystallography. Phases were calculated using the multiple isomorphous replacement procedure and a preliminary model was built. This model, with an initial R-factor of 0.57, was then improved by a cycle of refinement by simulated annealing which brought the R factor down to 0.32. The protein is structured as a compact 10-stranded-β-barrel which encapsulates a residual electron density that can be interpreted as a fatty acid molecule. The NH2-terminus portion of the molecule contains two short α-helices. The structure of this liver protein appears very similar to that of the Escherichia coli derived rat intestinal FABP recently determined by X-ray diffraction methods. © 1990 Kluwer Academic Publishers.
Crystal Structure of Chicken Liver basic fatty acid-binding protein at 2.7A resolution
SPADON, PAOLA;MAMMI, MARIO;ZANOTTI, GIUSEPPE;
1990
Abstract
The three-dimensional structure of chicken liver basic fatty acid-binding protein has been determined at 2.7 Å resolution by X-ray crystallography. Phases were calculated using the multiple isomorphous replacement procedure and a preliminary model was built. This model, with an initial R-factor of 0.57, was then improved by a cycle of refinement by simulated annealing which brought the R factor down to 0.32. The protein is structured as a compact 10-stranded-β-barrel which encapsulates a residual electron density that can be interpreted as a fatty acid molecule. The NH2-terminus portion of the molecule contains two short α-helices. The structure of this liver protein appears very similar to that of the Escherichia coli derived rat intestinal FABP recently determined by X-ray diffraction methods. © 1990 Kluwer Academic Publishers.
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