Crystal packing induces a conformational change in profilin-I from Acanthamoeba castellanii.Liu, S., Fedorov, A.A., Pollard, T.D., Lattman, E.E., Almo, S.C., Magnus, K.A.
(1998) J.Struct.Biol. 123: 22-29
- PubMed: 9774541
- DOI: 10.1006/jsbi.1998.4009
- PubMed Abstract:
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- The Molecular Basis for Allergen Cross-Reactivity: Crystal Structure and Ige-Epitope Mapping of Birch Pollen Profilin
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(1997) Structure 5: 33
- X-Ray Structures of Isoforms of the Actin-Binding Protein Profilin that Differ in Their Affinity for Phosphatidylinositol Phosphates
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(1994) Proc.Natl.Acad.Sci.USA 91: 8636
Profilin-I from Acanthamoeba castellanii is a 13-kDa protein that binds actin and poly-l-proline. The native protein has been crystallized in two different but closely related forms. The second form proved more amenable to three-dimensional structura ...
Profilin-I from Acanthamoeba castellanii is a 13-kDa protein that binds actin and poly-l-proline. The native protein has been crystallized in two different but closely related forms. The second form proved more amenable to three-dimensional structural determination using heavy-atom isomorphous methods to obtain crystallographic phase information. We used the second crystal structure as a test molecule in the molecular replacement procedure to determine the structure of the first crystal form of profilin-I. More residues participate in crystal lattice contacts in the first crystal form than in the second. The two crystal forms differ significantly in the C-terminal helix that interacts with actin and in the loop preceding this helix. Coordinates of some main chain atoms here differ by about 1.0 A, and side chain atoms differ by more than 2.0 A.
Department of Biochemistry, Department of Physiology and Biophysics, School of Medicine, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, Ohio, 44106-4935, USA.