ISSN:
1399-0047
Quelle:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Thema:
Chemie und Pharmazie
,
Geologie und Paläontologie
,
Physik
Notizen:
The LrpA transcriptional regulator from Pyrococcus furiosus, a member of the leucine-responsive regulatory protein (Lrp) family, has been crystallized by the hanging-drop method of vapour diffusion using ammonium sulfate as the precipitant. The crystals belong to the tetragonal system and are in space group I4122, with unit-cell parameters a = b = 104.5, c = 245.1 Å. Consideration of the values of VM and possible packing of the molecules within the cell suggest that the asymmetric unit contains a dimer. Examination of the behaviour of the protein on gel-filtration columns and analysis of the self-rotation function suggests that the molecule is an octamer in solution at around pH 5. Determination of the structure of this protein will provide insights into the mechanisms responsible for DNA–protein recognition at high temperature and into how the regulatory properties of the Lrp family are modified by the presence or absence of effector molecules.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1107/S0907444901005261
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