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Melvin Okamura

TitleEmeritus Professor
InstitutionUniversity of California San Diego
DepartmentPhysics
Address9500 Gilman Drive #0319
La Jolla CA 92093
Phone858-534-2506
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    Collapse Research 
    Collapse Research Activities and Funding
    Electron and Proton Transfer in Reaction Centers
    NIH/NIGMS R01GM041637Apr 1, 1989 - Jan 31, 2012
    Role: Principal Investigator

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    Collapse Publications
    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Researchers can login to make corrections and additions, or contact us for help.
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    1. Okamura M, Lubitz W, Allen JP. Remembering George Feher (1924-2017). Photosynth Res. 2018 May 25. PMID: 29802563.
      View in: PubMed
    2. Okamura M, Wraight CA, van Grondelle R. Special issue of photosynthetic research. Photosynth Res. 2014 May; 120(1-2):1-2. PMID: 24287763.
      View in: PubMed
    3. Okamura M. George Feher: a pioneer in reaction center research. Photosynth Res. 2014 May; 120(1-2):29-42. PMID: 24104959.
      View in: PubMed
    4. Flores M, Okamura M, Niklas J, Pandelia ME, Lubitz W. Pulse Q-band EPR and ENDOR spectroscopies of the photochemically generated monoprotonated benzosemiquinone radical in frozen alcoholic solution. J Phys Chem B. 2012 Aug 02; 116(30):8890-900. PMID: 22731760; PMCID: PMC3432317.
    5. Flores M, Savitsky A, Paddock ML, Abresch EC, Dubinskii AA, Okamura M, Lubitz W, Möbius K. Electron-nuclear and electron-electron double resonance spectroscopies show that the primary quinone acceptor QA in reaction centers from photosynthetic bacteria Rhodobacter sphaeroides remains in the same orientation upon light-induced reduction. J Phys Chem B. 2010 Dec 23; 114(50):16894-901. PMID: 21090818.
      View in: PubMed
    6. Abresch EC, Gong XM, Paddock ML, Okamura M. Electron transfer from cytochrome c(2) to the reaction center: a transition state model for ionic strength effects due to neutral mutations. Biochemistry. 2009 Dec 08; 48(48):11390-8. PMID: 19877711; PMCID: PMC2789999.
    7. Iwata T, Paddock ML, Okamura M, Kandori H. Identification of FTIR bands due to internal water molecules around the quinone binding sites in the reaction center from Rhodobacter sphaeroides. Biochemistry. 2009 Feb 17; 48(6):1220-9. PMID: 19161296; PMCID: PMC2701474.
    8. Abresch EC, Paddock ML, Villalobos M, Chang C, Okamura M. Interaction between cytochrome c2 and the photosynthetic reaction center from Rhodobacter sphaeroides: role of interprotein hydrogen bonds in binding and electron transfer. Biochemistry. 2008 Dec 16; 47(50):13318-25. PMID: 19053264; PMCID: PMC2615004.
    9. Nabedryk E, Paddock ML, Okamura M, Breton J. Monitoring the pH dependence of IR carboxylic acid signals upon Q(B)- formation in the Glu-L212 --> Asp/Asp-L213 --> Glu swap mutant reaction center from Rhodobacter sphaeroides. Biochemistry. 2007 Feb 06; 46(5):1176-82. PMID: 17260947.
      View in: PubMed
    10. Nabedryk E, Paddock ML, Okamura M, Breton J. An isotope-edited FTIR investigation of the role of Ser-L223 in binding quinone (QB) and semiquinone (QB-) in the reaction center from Rhodobacter sphaeroides. Biochemistry. 2005 Nov 08; 44(44):14519-27. PMID: 16262252.
      View in: PubMed
    11. Miyashita O, Okamura M, Onuchic JN. Interprotein electron transfer from cytochrome c2 to photosynthetic reaction center: tunneling across an aqueous interface. Proc Natl Acad Sci U S A. 2005 Mar 08; 102(10):3558-63. PMID: 15738426; PMCID: PMC553326.
    12. Axelrod HL, Okamura M. The structure and function of the cytochrome c2: reaction center electron transfer complex from Rhodobacter sphaeroides. Photosynth Res. 2005; 85(1):101-14. PMID: 15977062.
      View in: PubMed
    13. Miyashita O, Onuchic JN, Okamura M. Transition state and encounter complex for fast association of cytochrome c2 with bacterial reaction center. Proc Natl Acad Sci U S A. 2004 Nov 16; 101(46):16174-9. PMID: 15520377; PMCID: PMC528947.
    14. Nabedryk E, Breton J, Okamura M, Paddock ML. Identification of a novel protonation pattern for carboxylic acids upon Q(B) photoreduction in Rhodobacter sphaeroides reaction center mutants at Asp-L213 and Glu-L212 sites. Biochemistry. 2004 Jun 15; 43(23):7236-43. PMID: 15182169.
      View in: PubMed
    15. Xu Q, Axelrod HL, Abresch EC, Paddock ML, Okamura M, Feher G. X-Ray structure determination of three mutants of the bacterial photosynthetic reaction centers from Rb. sphaeroides; altered proton transfer pathways. Structure. 2004 Apr; 12(4):703-15. PMID: 15062092.
      View in: PubMed
    16. Gong XM, Paddock ML, Okamura M. Interactions between cytochrome c2 and photosynthetic reaction center from Rhodobacter sphaeroides: changes in binding affinity and electron transfer rate due to mutation of interfacial hydrophobic residues are strongly correlated. Biochemistry. 2003 Dec 16; 42(49):14492-500. PMID: 14661961.
      View in: PubMed
    17. Miyashita O, Onuchic JN, Okamura M. Continuum electrostatic model for the binding of cytochrome c2 to the photosynthetic reaction center from Rhodobacter sphaeroides. Biochemistry. 2003 Oct 14; 42(40):11651-60. PMID: 14529275.
      View in: PubMed
    18. Calvo R, Isaacson RA, Abresch EC, Okamura M, Feher G. Spin-lattice relaxation of coupled metal-radical spin-dimers in proteins: application to Fe(2+)-cofactor (Q(A)(-.), Q(B)(-.), phi(-.)) dimers in reaction centers from photosynthetic bacteria. Biophys J. 2002 Nov; 83(5):2440-56. PMID: 12414679; PMCID: PMC1302331.
    19. Axelrod HL, Abresch EC, Okamura M, Yeh AP, Rees DC, Feher G. X-ray structure determination of the cytochrome c2: reaction center electron transfer complex from Rhodobacter sphaeroides. J Mol Biol. 2002 May 31; 319(2):501-15. PMID: 12051924.
      View in: PubMed
    20. Mezzetti A, Nabedryk E, Breton J, Okamura M, Paddock ML, Giacometti G, Leibl W. Rapid-scan Fourier transform infrared spectroscopy shows coupling of GLu-L212 protonation and electron transfer to Q(B) in Rhodobacter sphaeroides reaction centers. Biochim Biophys Acta. 2002 Feb 15; 1553(3):320-30. PMID: 11997141.
      View in: PubMed
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