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Molecular characterization of the sor gene, which encodes the sulfur oxygenase/reductase of the thermoacidophilic Archaeum Desulfurolobus ambivalens.
Kletzin A. Kletzin A. J Bacteriol. 1992 Sep;174(18):5854-9. doi: 10.1128/jb.174.18.5854-5859.1992. J Bacteriol. 1992. PMID: 1522063 Free PMC article.
The native enzyme is a 550,000-molecular-weight oligomer composed of single 40,000-molecular-weight subunits; this oligomer is capable of the simultaneous oxidation and reduction of sulfur (A. Kletzin, J. Bacteriol. 171:1638-1643, 1989). From the fragment, 3, …
The native enzyme is a 550,000-molecular-weight oligomer composed of single 40,000-molecular-weight subunits; this oligomer is capabl …
The sulfur oxygenase reductase from the mesophilic bacterium Halothiobacillus neapolitanus is a highly active thermozyme.
Veith A, Botelho HM, Kindinger F, Gomes CM, Kletzin A. Veith A, et al. Among authors: kletzin a. J Bacteriol. 2012 Feb;194(3):677-85. doi: 10.1128/JB.06531-11. Epub 2011 Dec 2. J Bacteriol. 2012. PMID: 22139503 Free PMC article.
Identification of core active site residues of the sulfur oxygenase reductase from Acidianus ambivalens by site-directed mutagenesis.
Urich T, Kroke A, Bauer C, Seyfarth K, Reuff M, Kletzin A. Urich T, et al. FEMS Microbiol Lett. 2005 Jul 15;248(2):171-6. doi: 10.1016/j.femsle.2005.05.031. FEMS Microbiol Lett. 2005. PMID: 15970399
C101A, C104S/A, and C101/104S/A double mutants caused a decrease in specific activity to 10-43% of the wild type while the C101S mutant showed only 1% activity of the wild type. The drop in activity of the C101S and E114D mutants was accompanied with a
C101A, C104S/A, and C101/104S/A double mutants caused a decrease in specific activity to 10-43% of the wild type while …
The sulfur oxygenase reductase from Acidianus ambivalens is an icosatetramer as shown by crystallization and Patterson analysis.
Urich T, Coelho R, Kletzin A, Frazao C. Urich T, et al. Biochim Biophys Acta. 2005 Mar 14;1747(2):267-70. doi: 10.1016/j.bbapap.2004.11.015. Epub 2004 Dec 19. Biochim Biophys Acta. 2005. PMID: 15698962
They belonged to space-group I4 and diffraction data were collected up to 1.7 A resolution. Their Patterson symmetry shows additional 4-, 3- and 2-fold non-crystallographic symmetry rotation axes, characteristic of the point group 432. ...
They belonged to space-group I4 and diffraction data were collected up to 1.7 A resolution. Their Patterson symmetry shows additional …
The sulphur oxygenase reductase from Acidianus ambivalens is a multimeric protein containing a low-potential mononuclear non-haem iron centre.
Urich T, Bandeiras TM, Leal SS, Rachel R, Albrecht T, Zimmermann P, Scholz C, Teixeira M, Gomes CM, Kletzin A. Urich T, et al. Biochem J. 2004 Jul 1;381(Pt 1):137-46. doi: 10.1042/BJ20040003. Biochem J. 2004. PMID: 15030315 Free PMC article.
The analysis of the quaternary structures showed a ball-shaped assembly with a central hollow core probably consisting of 24 subunits in a 432 symmetry. ...Thus both EPR and chemical analysis indicate the presence of a mononuclear iron centre, which ha …
The analysis of the quaternary structures showed a ball-shaped assembly with a central hollow core probably consisting of 24 s …
Membrane-bound hydrogenase and sulfur reductase of the hyperthermophilic and acidophilic archaeon Acidianus ambivalens.
Laska S, Lottspeich F, Kletzin A. Laska S, et al. Microbiology. 2003 Sep;149(Pt 9):2357-2371. doi: 10.1099/mic.0.26455-0. Microbiology. 2003. PMID: 12949162
A sulfur reductase (SR) and a hydrogenase were purified from solubilized membrane fractions of anaerobically grown cells of the sulfur-dependent archaeon Acidianus ambivalens and the corresponding genes were sequenced. ...A phylogenetic analysis of the SR ami
A sulfur reductase (SR) and a hydrogenase were purified from solubilized membrane fractions of anaerobically grown cells of th
A Sulfur Oxygenase from the Haloalkaliphilic Bacterium Thioalkalivibrio paradoxus with Atypically Low Reductase Activity.
Rühl P, Pöll U, Braun J, Klingl A, Kletzin A. Rühl P, et al. Among authors: kletzin a. J Bacteriol. 2017 Jan 30;199(4):e00675-16. doi: 10.1128/JB.00675-16. Print 2017 Feb 15. J Bacteriol. 2017. PMID: 27920296 Free PMC article.
X-ray Structure of a self-compartmentalizing sulfur cycle metalloenzyme.
Urich T, Gomes CM, Kletzin A, Frazão C. Urich T, et al. Science. 2006 Feb 17;311(5763):996-1000. doi: 10.1126/science.1120306. Science. 2006. PMID: 16484493
Twenty-four monomers form a large hollow sphere enclosing a positively charged nanocompartment. Apolar channels provide access for linear sulfur species. A cysteine persulfide and a low-potential mononuclear non-heme iron site ligated by a 2-His …
Twenty-four monomers form a large hollow sphere enclosing a positively charged nanocompartment. Apolar channels provide access …
Substrate pathways and mechanisms of inhibition in the sulfur oxygenase reductase of acidianus ambivalens.
Veith A, Urich T, Seyfarth K, Protze J, Frazão C, Kletzin A. Veith A, et al. Among authors: kletzin a. Front Microbiol. 2011 Mar 7;2:37. doi: 10.3389/fmicb.2011.00037. eCollection 2011. Front Microbiol. 2011. PMID: 21747782 Free PMC article.
Coupled enzymatic production of sulfite, thiosulfate, and hydrogen sulfide from sulfur: purification and properties of a sulfur oxygenase reductase from the facultatively anaerobic archaebacterium Desulfurolobus ambivalens.
Kletzin A. Kletzin A. J Bacteriol. 1989 Mar;171(3):1638-43. doi: 10.1128/jb.171.3.1638-1643.1989. J Bacteriol. 1989. PMID: 2493451 Free PMC article.
In the presence of oxygen but not under a hydrogen atmosphere, the enzyme simultaneously produced sulfite, thiosulfate, and hydrogen sulfide from sulfur. Nonenzymatic control experiments showed that thiosulfate was produced mainly in a chemical reaction between sulf …
In the presence of oxygen but not under a hydrogen atmosphere, the enzyme simultaneously produced sulfite, thiosulfate, and hydrogen …
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