2j46
WATER STRUCTURE OF T. AQUATICUS FFH NG DOMAIN AT 1.1A RESOLUTION
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OverviewOverview
Two new structures of the SRP GTPase Ffh have been determined at 1.1 A, resolution and provide the basis for comparative examination of the, extensive water structure of the apo conformation of these GTPases. A set, of well defined water-binding positions have been identified in the active, site of the two-domain ;NG' GTPase, as well as at two functionally, important interfaces. The water hydrogen-bonding network accommodates, alternate conformations of the protein side chains by undergoing local, rearrangements and, in one case, illustrates binding of a solute molecule, within the active site by displacement of water molecules without further, disruption of the water-interaction network. A subset of the water, positions are well defined in several lower resolution structures, including those of different nucleotide-binding states; these appear to, function in maintaining the protein structure. Consistent arrangements of, surface water between three different ultrahigh-resolution structures, provide a framework for beginning to understand how local water structure, contributes to protein-ligand and protein-protein binding in the SRP, GTPases.
About this StructureAbout this Structure
2J46 is a Single protein structure of sequence from Thermus aquaticus with CL, ACT, MN and MRD as ligands. Full crystallographic information is available from OCA.
ReferenceReference
Analysis of protein hydration in ultrahigh-resolution structures of the SRP GTPase Ffh., Ramirez UD, Freymann DM, Acta Crystallogr D Biol Crystallogr. 2006 Dec;62(Pt 12):1520-34. Epub 2006, Nov 23. PMID:17139088
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