4mnn

The crystal structure of Sso1120 from Sulfolobus solfataricus

spinqualitylabelsall models 4mnn, resolution 1.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4mnn is a 1 chain structure with sequence from Saccharolobus solfataricus P2. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: GOL Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q97Z21_SACS2 Publication Abstract from PubMed Protein disulfide oxidoreductases (PDOs) are proteins involved in disulfide bond formation playing a crucial role in adaptation to extreme environment. This paper reports the functional and structural characterization of Sso1120, a PDO from the hyperthermophilic archaeon Sulfolobus solfataricus. The protein was expressed in Escherichia coli and purified to homogeneity. The functional characterization showed that the enzyme has reductase activity, as tested by insulin assay, but differently from the other PDOs, it does not present isomerase activity. In addition it is able to form a redox couple with the thioredoxin reductase that could be used in undiscovered pathways. The protein revealed a melting point of around 90 degrees C in CD spectroscopy-monitored thermal denaturation and high denaturant resistance. The X-ray crystallographic structure was solved at 1.80 A resolution, showing differences with respect to other PDOs and an unexpected similarity with the N-terminal domain of the alkyl hydroperoxide reductase F component from Salmonella typhimurium. On the basis of the reported data and of bioinformatics and phylogenetic analyses, a possible involvement of this atypical PDO in a new antioxidant system of S. solfataricus has been proposed. Sulfolobus solfataricus thiol redox puzzle: characterization of an atypical protein disulfide oxidoreductase.,Limauro D, De Simone G, Pirone L, Bartolucci S, D'Ambrosio K, Pedone E Extremophiles. 2013 Dec 5. PMID:24306780 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

Proteopedia Page Contributors and Editors (what is this?)

OCA