1B2K: Structural Effects Of Monovalent Anions On Polymorphic Lysozyme Crystals

Citation:
Abstract
Understanding direct salt effects on protein crystal polymorphism is addressed by comparing different crystal forms (triclinic, monoclinic, tetragonal and orthorhombic) for hen, turkey, bob white quail and human lysozymes. Four new structures of hen egg-white lysozyme are reported: crystals grown in the presence of NapTS diffracted to 1.85 A, of NaI to 1.6 A, of NaNO(3) to 1.45 A and of KSCN to 1.63 A. These new structures are compared with previously published structures in order to draw a mapping of the surface of different lysozymes interacting with monovalent anions, such as nitrate, chloride, iodide, bromide and thiocyanate. An analysis of the structural sites of these anions in the various lysozyme structures is presented. This study shows common anion sites whatever the crystal form and the chemical nature of anions, while others seem specific to a given geometry and a particular charge environment induced by the crystal packing.
PDB ID: 1B2KDownload
MMDB ID: 12132
PDB Deposition Date: 1998/11/26
Updated in MMDB: 2007/11
Experimental Method:
x-ray diffraction
Resolution: 1.6  Å
Source Organism:
Similar Structures:
Biological Unit for 1B2K: dimeric; determined by author
Molecular Components in 1B2K
Label Count Molecule
Proteins (2 molecules)
2
Protein (Lysozyme)(Gene symbol: LYZ)
Molecule annotation
Chemicals (17 molecules)
1
17
* Click molecule labels to explore molecular sequence information.

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