B Barquera

Summary

Affiliation: University of Illinois
Country: USA

Publications

  1. ncbi Expression and mutagenesis of the NqrC subunit of the NQR respiratory Na(+) pump from Vibrio cholerae with covalently attached FMN
    B Barquera
    Department of Biochemistry, University of Illinois at Urbana Champaign, Urbana, 61801, USA
    FEBS Lett 492:45-9. 2001
  2. ncbi Direct evidence for the protonation of aspartate-75, proposed to be at a quinol binding site, upon reduction of cytochrome bo3 from Escherichia coli
    P Hellwig
    Department of Biochemistry, University of Illinois, 600 South Mathews Avenue, Urbana, Illinois 61801 3364, USA
    Biochemistry 40:1077-82. 2001
  3. ncbi Pathways for proton release during ubihydroquinone oxidation by the bc(1) complex
    A R Crofts
    Department of Biochemistry, University of Illinois at Urbana Champaign, Urbana, IL 61801, USA
    Proc Natl Acad Sci U S A 96:10021-6. 1999
  4. ncbi Glutamate-89 in subunit II of cytochrome bo3 from Escherichia coli is required for the function of the heme-copper oxidase
    J Ma
    Department of Biochemistry, University of Illinois, Urbana 61801, USA
    Biochemistry 38:15150-6. 1999
  5. ncbi The cbb3-type cytochrome c oxidase from Rhodobacter sphaeroides, a proton-pumping heme-copper oxidase
    M Toledo-Cuevas
    Departamento de Bioquimica, UNAM, Ciudad Universitaria, Mexico D F, Mexico
    Biochim Biophys Acta 1365:421-34. 1998
  6. ncbi The Na+ and K+ transport deficiency of an E. coli mutant lacking the NhaA and NhaB proteins is apparent and caused by impaired osmoregulation
    M L Verkhovskaya
    Department of Medical Chemistry, Institute of Biomedical Sciences, University of Helsinki, Finland
    FEBS Lett 439:271-4. 1998
  7. ncbi Sodium-dependent steps in the redox reactions of the Na+-motive NADH:quinone oxidoreductase from Vibrio harveyi
    A V Bogachev
    Department of Bioenergetics, A. N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow 119899, Russia
    Biochemistry 40:7318-23. 2001

Collaborators

Detail Information

Publications7

  1. ncbi Expression and mutagenesis of the NqrC subunit of the NQR respiratory Na(+) pump from Vibrio cholerae with covalently attached FMN
    B Barquera
    Department of Biochemistry, University of Illinois at Urbana Champaign, Urbana, 61801, USA
    FEBS Lett 492:45-9. 2001
    ..In contrast, no covalent flavin was detected when threonine-225 was replaced by leucine. The data show that the FMN attachment does not require assembly of the enzyme and are consistent with the unusual threonine attachment site...
  2. ncbi Direct evidence for the protonation of aspartate-75, proposed to be at a quinol binding site, upon reduction of cytochrome bo3 from Escherichia coli
    P Hellwig
    Department of Biochemistry, University of Illinois, 600 South Mathews Avenue, Urbana, Illinois 61801 3364, USA
    Biochemistry 40:1077-82. 2001
    ..It is suggested that upon reduction of the bound ubiquinone at the high affinity site, D75 takes up a proton, possibly sharing it with ubiquinol...
  3. ncbi Pathways for proton release during ubihydroquinone oxidation by the bc(1) complex
    A R Crofts
    Department of Biochemistry, University of Illinois at Urbana Champaign, Urbana, IL 61801, USA
    Proc Natl Acad Sci U S A 96:10021-6. 1999
    ..H(+) transfer from semiquinone to the carboxylate side chain and rotation to the position found in the myxothiazol structure provide a pathway for release of the second proton...
  4. ncbi Glutamate-89 in subunit II of cytochrome bo3 from Escherichia coli is required for the function of the heme-copper oxidase
    J Ma
    Department of Biochemistry, University of Illinois, Urbana 61801, USA
    Biochemistry 38:15150-6. 1999
    ..Thus, it appears that the inhibition resulting from the E89II mutation is due to a block in the reduction of the heme-copper binuclear center, expected for K-channel mutants...
  5. ncbi The cbb3-type cytochrome c oxidase from Rhodobacter sphaeroides, a proton-pumping heme-copper oxidase
    M Toledo-Cuevas
    Departamento de Bioquimica, UNAM, Ciudad Universitaria, Mexico D F, Mexico
    Biochim Biophys Acta 1365:421-34. 1998
    ..Analysis of proton translocation in several strains shows that cytochrome cbb3 is a proton pump. We also conclude that cytochromes cbb3 and aa3 are the only cytochrome c oxidases in the respiratory chain of R. sphaeroides...
  6. ncbi The Na+ and K+ transport deficiency of an E. coli mutant lacking the NhaA and NhaB proteins is apparent and caused by impaired osmoregulation
    M L Verkhovskaya
    Department of Medical Chemistry, Institute of Biomedical Sciences, University of Helsinki, Finland
    FEBS Lett 439:271-4. 1998
    ..We suggest that this mutant is primarily deficient in osmoregulation rather than in cation transport per se...
  7. ncbi Sodium-dependent steps in the redox reactions of the Na+-motive NADH:quinone oxidoreductase from Vibrio harveyi
    A V Bogachev
    Department of Bioenergetics, A. N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow 119899, Russia
    Biochemistry 40:7318-23. 2001
    ..These data led us to conclude that the sodium-dependent step within the Na+-NQR is located between the noncovalently bound FAD and the covalently bound FMN...