Literature DB >> 8075117

Homotropic and heterotropic cooperativity in the tetrahaem cytochrome c3 from Desulfovibrio vulgaris.

D L Turner1, C A Salgueiro, T Catarino, J LeGall, A V Xavier.   

Abstract

The thermodynamic parameters which govern the homotropic (e-/e-) and heterotropic (e-/H+) cooperativity in the tetrahaem cytochrome c3 isolated from Desulfovibrio vulgaris (Hildenborough) were determined, using the paramagnetic shifts of haem methyl groups in the NMR spectra of intermediate oxidized states at different pH levels. A model is put forward to explain how the network of positive and negative cooperativities between the four haems and acid/base group(s) enables the protein to achieve a proton-assisted 2e- step.

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Year:  1994        PMID： 8075117     DOI： 10.1016/0005-2728(94)90117-1

Source DB:  PubMed          Journal:  Biochim Biophys Acta        ISSN： 0006-3002


  7 in total

1.  Reorganization and conformational changes in the reduction of tetraheme cytochromes.

Authors:  A Sofia F Oliveira; Vitor H Teixeira; António M Baptista; Cláudio M Soares
Journal:  Biophys J       Date:  2005-09-16       Impact factor: 4.033

2.  Molecular dynamics simulation of cytochrome c3: studying the reduction processes using free energy calculations.

Authors:  C M Soares; P J Martel; J Mendes; M A Carrondo
Journal:  Biophys J       Date:  1998-04       Impact factor: 4.033

3.  Simulation of electron-proton coupling with a Monte Carlo method: application to cytochrome c3 using continuum electrostatics.

Authors:  A M Baptista; P J Martel; C M Soares
Journal:  Biophys J       Date:  1999-06       Impact factor: 4.033

4.  Ionic strength-dependent physicochemical factors in cytochrome c3 regulating the electron transfer rate.

Authors:  T Ohmura; H Nakamura; K Niki; M A Cusanovich; H Akutsu
Journal:  Biophys J       Date:  1998-09       Impact factor: 4.033

5.  Modeling electron transfer thermodynamics in protein complexes: interaction between two cytochromes c(3).

Authors:  Vitor H Teixeira; António M Baptista; Cláudio M Soares
Journal:  Biophys J       Date:  2004-05       Impact factor: 4.033

6.  Investigation of protonatable residues in Rhodothermus marinus caa3 haem-copper oxygen reductase: comparison with Paracoccus denitrificans aa3 haem-copper oxygen reductase.

Authors:  Cláudio M Soares; António M Baptista; Manuela M Pereira; Miguel Teixeira
Journal:  J Biol Inorg Chem       Date:  2003-12-23       Impact factor: 3.358

7.  Roles of charged residues in pH-dependent redox properties of cytochrome c3 from Desulfovibrio vulgaris Miyazaki F.

Authors:  Naoki Yahata; Kiyoshi Ozawa; Yusuke Tomimoto; Kumiko Morita; Hirofumi Komori; Hideaki Ogata; Yoshiki Higuchi; Hideo Akutsu
Journal:  Biophysics (Nagoya-shi)       Date:  2006-07-21
  7 in total

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