1k2e | pdb_00001k2e
crystal structure of a nudix protein from Pyrobaculum aerophilum
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| 1k2e, resolution 1.80Å | |||||||||||||
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| Ligands: | SO4, NI, GOL and ACY | ||||||||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||||||||
Overview
Nudix proteins, formerly called MutT homolog proteins, are a large family of proteins that play an important role in reducing the accumulation of potentially toxic compounds inside the cell. They hydrolyze a wide variety of substrates that are mainly composed of a nucleoside diphosphate linked to some other moiety X and thus are called Nudix hydrolases. Here, the crystal structure of a Nudix hydrolase from the hyperthermophilic archaeon Pyrobaculum aerophilum is reported. The structure was determined by the single-wavelength anomalous scattering method with data collected at the peak anomalous wavelength of an iridium-derivatized crystal. It reveals an extensive dimer interface, with each subunit contributing two strands to the beta-sheet of the other subunit. Individual subunits consist of a mixed highly twisted and curved beta-sheet of 11 beta-strands and two alpha-helices, forming an alpha-beta-alpha sandwich. The conserved Nudix box signature motif, which contains the essential catalytic residues, is located at the first alpha-helix and the beta-strand and loop preceding it. The unusually short connections between secondary-structural elements, together with the dimer form of the structure, are likely to contribute to the thermostability of the P. aerophilum Nudix protein.
About this Structure
1K2E is a Single protein structure of sequence from Pyrobaculum aerophilum. Full crystallographic information is available from OCA.
Reference
Structure of a Nudix protein from Pyrobaculum aerophilum reveals a dimer with two intersubunit beta-sheets., Wang S, Mura C, Sawaya MR, Cascio D, Eisenberg D, Acta Crystallogr D Biol Crystallogr. 2002 Apr;58(Pt 4):571-8. Epub 2002, Mar 22. PMID:11914479
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