3q46

Publication Abstract from PubMed

Inorganic pyrophosphatase (IPPase) from the archaeon Thermococcus thioreducens was cloned, overexpressed in Escherichia coli, purified and crystallized in restricted geometry, resulting in large crystal volumes exceeding 5 mm3. IPPase is thermally stable and is able to resist denaturation at temperatures above 348 K. Owing to the high temperature tolerance of the enzyme, the protein was amenable to room-temperature manipulation at the level of protein preparation, crystallization and X-ray and neutron diffraction analyses. A complete synchrotron X-ray diffraction data set to 1.85 A resolution was collected at room temperature from a single crystal of IPPase (monoclinic space group C2, unit-cell parameters a=106.11, b=95.46, c=113.68 A, alpha=gamma=90.0, beta=98.12 degrees ). As large-volume crystals of IPPase can be obtained, preliminary neutron diffraction tests were undertaken. Consequently, Laue diffraction images were obtained, with reflections observed to 2.1 A resolution with I/sigma(I) greater than 2.5. The preliminary crystallographic results reported here set in place future structure-function and mechanism studies of IPPase.

Inorganic pyrophosphatase crystals from Thermococcus thioreducens for X-ray and neutron diffraction.,Hughes RC, Coates L, Blakeley MP, Tomanicek SJ, Langan P, Kovalevsky AY, Garcia-Ruiz JM, Ng JD Acta Crystallogr Sect F Struct Biol Cryst Commun. 2012 Dec 1;68(Pt 12):1482-7., doi: 10.1107/S1744309112032447. Epub 2012 Nov 14. PMID:23192028^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.