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Filters applied: . Clear all The following term was not found in PubMed: Sampson-Choma
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Did you mean toska k. Sampson-Choma (57 results)?
Crystal structure of the cytochrome p450cam mutant that exhibits the same spectral perturbations induced by putidaredoxin binding.
Nagano S, Tosha T, Ishimori K, Morishima I, Poulos TL. Nagano S, et al. J Biol Chem. 2004 Oct 8;279(41):42844-9. doi: 10.1074/jbc.M404217200. Epub 2004 Jul 21. J Biol Chem. 2004. PMID: 15269210 Free article.
These effects are unique to Pdx because nonphysiological electron donors are unable to support camphor monooxygenation. The accompanying 1H NMR paper (Tosha, T., Yoshioka, S., Ishimori, K., and Morishima, I. (2004) J. ...
These effects are unique to Pdx because nonphysiological electron donors are unable to support camphor monooxygenation. The accompanying 1H …
Roles of the proximal hydrogen bonding network in cytochrome P450cam-catalyzed oxygenation.
Yoshioka S, Tosha T, Takahashi S, Ishimori K, Hori H, Morishima I. Yoshioka S, et al. J Am Chem Soc. 2002 Dec 11;124(49):14571-9. doi: 10.1021/ja0265409. J Am Chem Soc. 2002. PMID: 12465966
Together with the results on L358P in which the amide proton at position 358 was removed (Yoshioka, S., Takahashi, S., Ishimori, K., Morishima, I. J. Inorg. Biochem. 2000, 81, 141-151), we propose that the side chain hydrogen bond and the electrostatic interaction of the a …
Together with the results on L358P in which the amide proton at position 358 was removed (Yoshioka, S., Takahashi, S., Ishimori, K., …
Unique peroxidase reaction mechanism in prostaglandin endoperoxide H synthase-2: compound I in prostaglandin endoperoxide H synthase-2 can be formed without assistance by distal glutamine residue.
Ichimura S, Uchida T, Taniguchi S, Hira S, Tosha T, Morishima I, Kitagawa T, Ishimori K. Ichimura S, et al. J Biol Chem. 2007 Jun 1;282(22):16681-90. doi: 10.1074/jbc.M610785200. Epub 2007 Apr 1. J Biol Chem. 2007. PMID: 17403665 Free article.
Although a previous study (Landino, L. M., Crews, B. C., Gierse, J. K., Hauser, S. D., and Marnett, L. (1997) J. Biol. Chem. 272, 21565-21574) suggested that the Gln residue might serve as a functionally equivalent residue to Arg, our current results clearly showed that th …
Although a previous study (Landino, L. M., Crews, B. C., Gierse, J. K., Hauser, S. D., and Marnett, L. (1997) J. Biol. Chem. 272, 215 …
CD and MCD spectroscopic studies of the two Dps miniferritin proteins from Bacillus anthracis: role of O2 and H2O2 substrates in reactivity of the diiron catalytic centers.
Schwartz JK, Liu XS, Tosha T, Diebold A, Theil EC, Solomon EI. Schwartz JK, et al. Biochemistry. 2010 Dec 14;49(49):10516-25. doi: 10.1021/bi101346c. Epub 2010 Nov 12. Biochemistry. 2010. PMID: 21028901 Free PMC article.
The data show a single 5- or 6-coordinate Fe(II) in the absence of oxidant; Fe(II) binding to Dps2 is 30 more stable than Dps1; and the lower limit of K(D) for binding a second Fe(II), in the absence of oxidant, is 2-3 orders of magnitude weaker than for the binding of the …
The data show a single 5- or 6-coordinate Fe(II) in the absence of oxidant; Fe(II) binding to Dps2 is 30 more stable than Dps1; and the lowe …
The ferritin Fe2 site at the diiron catalytic center controls the reaction with O2 in the rapid mineralization pathway.
Tosha T, Hasan MR, Theil EC. Tosha T, et al. Proc Natl Acad Sci U S A. 2008 Nov 25;105(47):18182-7. doi: 10.1073/pnas.0805083105. Epub 2008 Nov 14. Proc Natl Acad Sci U S A. 2008. PMID: 19011101 Free PMC article.
Ferritin with Asp(140), Ser(140), or Ala(140) formed diferric peroxo intermediates with variable kinetic stabilities and rates: t(1/2) varied 1- to 10-fold; k(cat) varied approximately 2- to 3-fold. Thus, relatively small differences in diiron protein catalytic sites deter …
Ferritin with Asp(140), Ser(140), or Ala(140) formed diferric peroxo intermediates with variable kinetic stabilities and rates: t(1/2) varie …
Oxidizing intermediates from the sterically hindered iron salen complexes related to the oxygen activation by nonheme iron enzymes.
Kurahashi T, Kobayashi Y, Nagatomo S, Tosha T, Kitagawa T, Fujii H. Kurahashi T, et al. Inorg Chem. 2005 Oct 31;44(22):8156-66. doi: 10.1021/ic051377e. Inorg Chem. 2005. PMID: 16241166
One-electron oxidation of 3 leads to oxidative degradation of the fifth EtO ligand to liberate acetaldehyde even at 203 K. The iron(III)-phenoxyl radical shows high reactivity for alcoxide on iron(III) but exhibits virtually no reactivity for alcohols including even benzyl …
One-electron oxidation of 3 leads to oxidative degradation of the fifth EtO ligand to liberate acetaldehyde even at 203 K. The iron(I …
Molecular mechanism of the electron transfer reaction in cytochrome P450(cam)--putidaredoxin: roles of glutamine 360 at the heme proximal site.
Tosha T, Yoshioka S, Hori H, Takahashi S, Ishimori K, Morishima I. Tosha T, et al. Biochemistry. 2002 Nov 26;41(47):13883-93. doi: 10.1021/bi0261037. Biochemistry. 2002. PMID: 12437345
The kinetic analysis of the ET reactions from reduced Pdx to ferric P450(cam) (the first ET) and to ferrous oxygenated P450(cam) (the second ET) showed the dissociation constants (K(m)) that were moderately perturbed for the Lys and Leu mutants and the distinctly increased …
The kinetic analysis of the ET reactions from reduced Pdx to ferric P450(cam) (the first ET) and to ferrous oxygenated P450(cam) (the second …
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