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Excitation of the M intermediates of wild-type bacteriorhodopsin and mutant D96N: temperature dependence of absorbance, electric responses and proton movements. Theor Chem Acc 2010. [DOI: 10.1007/s00214-009-0632-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Wu J, Ma D, Wang Y, Ming M, Balashov SP, Ding J. Efficient Approach to Determine the pKa of the Proton Release Complex in the Photocycle of Retinal Proteins. J Phys Chem B 2009; 113:4482-91. [DOI: 10.1021/jp804838h] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jia Wu
- Key Laboratory of Molecular Engineering of Polymers of Ministry of Education, Department of Macromolecular Science, Advanced Materials Laboratory, Fudan University, Shanghai 200433, China and Department of Physiology and Biophysics, University of California, Irvine 92697, USA
| | - Dewang Ma
- Key Laboratory of Molecular Engineering of Polymers of Ministry of Education, Department of Macromolecular Science, Advanced Materials Laboratory, Fudan University, Shanghai 200433, China and Department of Physiology and Biophysics, University of California, Irvine 92697, USA
| | - Yazhuo Wang
- Key Laboratory of Molecular Engineering of Polymers of Ministry of Education, Department of Macromolecular Science, Advanced Materials Laboratory, Fudan University, Shanghai 200433, China and Department of Physiology and Biophysics, University of California, Irvine 92697, USA
| | - Ming Ming
- Key Laboratory of Molecular Engineering of Polymers of Ministry of Education, Department of Macromolecular Science, Advanced Materials Laboratory, Fudan University, Shanghai 200433, China and Department of Physiology and Biophysics, University of California, Irvine 92697, USA
| | - Sergei P. Balashov
- Key Laboratory of Molecular Engineering of Polymers of Ministry of Education, Department of Macromolecular Science, Advanced Materials Laboratory, Fudan University, Shanghai 200433, China and Department of Physiology and Biophysics, University of California, Irvine 92697, USA
| | - Jiandong Ding
- Key Laboratory of Molecular Engineering of Polymers of Ministry of Education, Department of Macromolecular Science, Advanced Materials Laboratory, Fudan University, Shanghai 200433, China and Department of Physiology and Biophysics, University of California, Irvine 92697, USA
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Tóth-Boconádi R, Dér A, Fábián L, Taneva SG, Keszthelyi L. Excitation of the M Intermediates of Bacteriorhodopsin. Photochem Photobiol 2009; 85:609-13. [DOI: 10.1111/j.1751-1097.2008.00521.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Tóth-Boconádi R, Taneva SG, Keszthelyi L. Actinic light-energy dependence of proton release from bacteriorhodopsin. Biophys J 2005; 89:2605-9. [PMID: 16085768 PMCID: PMC1366760 DOI: 10.1529/biophysj.105.066431] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Measuring the light-density (fluence) dependence of proton release from flash excited bacteriorhodopsin with two independent methods we found that the lifetime of proton release increases and the proton pumping activity, defined as a number of protons per number of photocycle, decreases with increasing fluence. An interpretation of these results, based on bending of purple membrane and electrical interaction among the proton release groups of bacteriorhodopsin trimer, is presented.
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Affiliation(s)
- R Tóth-Boconádi
- Institute of Biophysics, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary
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