Zobrazeno 1 - 10
of 101
pro vyhledávání: '"Joann Williams"'
Publikováno v:
Photochemicalphotobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology. 21(1)
In this paper we report the design of hybrid reaction centers with a novel redox-active cofactor. Reaction centers perform the primary photochemistry of photosynthesis, namely the light-induced transfer of an electron from the bacteriochlorophyll dim
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::76a958c93e41de2e0cc50e9d27488559
https://pubmed.ncbi.nlm.nih.gov/34850374
https://pubmed.ncbi.nlm.nih.gov/34850374
Publikováno v:
The Journal of Physical Chemistry B. 123:8717-8726
Low-temperature persistent and transient hole-burning (HB) spectra are presented for the triple hydrogen-bonded L131LH + M160LH + M197FH mutant of Rhodobacter sphaeroides. These spectra expose the heterogeneous nature of the P-, B-, and H-bands, cons
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3e8549255d29171d671545edeafc6260
https://doi.org/10.1021/acs.jpcb.9b08388
https://doi.org/10.1021/acs.jpcb.9b08388
Publikováno v:
Biochemistry. 56:6460-6469
The ability of an artificial four-helix bundle Mn-protein, P1, to bind and transfer an electron to photosynthetic reaction centers from the purple bacterium Rhodobacter sphaeroides was characterized using optical spectroscopy. Upon illumination of re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::02bdb31603b1d204b9d59e1cd6125c99
https://doi.org/10.1021/acs.biochem.7b00978
https://doi.org/10.1021/acs.biochem.7b00978
Publikováno v:
Photosynthesis research. 143(2)
A biohybrid model system is described that interfaces synthetic Mn-oxides with bacterial reaction centers to gain knowledge concerning redox reactions by metal clusters in proteins, in particular the Mn4CaO5 cluster of photosystem II. The ability of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e97249f097b2d7ace152eebc5c2694c0
https://pubmed.ncbi.nlm.nih.gov/31641987
https://pubmed.ncbi.nlm.nih.gov/31641987
Autor:
Joann Williams, Eduardo Espiritu, Chad R. Simmons, Selvakumar Edwardraja, James P. Allen, Giovanna Ghirlanda, Tien L. Olson
Publikováno v:
Biochimica et Biophysica Acta (BBA) - Bioenergetics. 1857(5):539-547
A compelling target for the design of electron transfer proteins with novel cofactors is to create a model for the oxygen-evolving complex, a Mn4Ca cluster, of photosystem II. A mononuclear Mn cofactor can be added to the bacterial reaction center, b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2a3a6d129e4934f139207cbfc326221e
Autor:
James P. Allen, Joann Williams, Su Lin, Natalie Akram, Neal W. Woodbury, Sarthak Mandal, Eduardo Espiritu
Publikováno v:
The journal of physical chemistry. B. 122(44)
Energetics, protein dynamics, and electronic coupling are the key factors in controlling both electron and energy transfer in photosynthetic bacterial reaction centers (RCs). Here, we examine the rates and mechanistic pathways of the P+HA– radical-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b9a9cdf2df9e647b32d2a754749a6a8d
https://pubmed.ncbi.nlm.nih.gov/30351114
https://pubmed.ncbi.nlm.nih.gov/30351114
Autor:
Joann Williams, Anne-Marie Carey, Neal W. Woodbury, Bing Rong Gao, Joshua Locsin, Su Lin, Sarthak Mandal, James P. Allen
Publikováno v:
The journal of physical chemistry. B. 121(27)
In purple bacterial reaction centers, triplet excitation energy transfer occurs from the primary donor P, a bacteriochlorophyll dimer, to a neighboring carotenoid to prevent photodamage from the generation of reactive oxygen species. The BB bacterioc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ea729f63186360fd96d35c1679148c52
https://pubmed.ncbi.nlm.nih.gov/28605596
https://pubmed.ncbi.nlm.nih.gov/28605596
Autor:
Selvakumar Edwardraja, Marco Flores, Giovanna Ghirlanda, Elizabeth Canarie, Joann Williams, Eduardo Espiritu, Tien L. Olson, James P. Allen
Publikováno v:
Biochimica et biophysica acta. Bioenergetics. 1858(12)
To better understand metalloproteins with Mn-clusters, we have designed artificial four-helix bundles to have one, two, or three dinuclear metal centers able to bind Mn(II). Circular dichroism measurements showed that the Mn-proteins have substantial
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8bd83198b8c70dda01f5e20ce49febc0
https://pubmed.ncbi.nlm.nih.gov/28882760
https://pubmed.ncbi.nlm.nih.gov/28882760
Publikováno v:
Photosynthesis Research. 120:207-220
The electronic structure of a Mn(II) ion bound to highly oxidizing reaction centers of Rhodobacter sphaeroides was studied in a mutant modified to possess a metal binding site at a location comparable to the Mn4Ca cluster of photosystem II. The Mn-bi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::17477794e64aa382e35fe747cfe6912a
https://doi.org/10.1007/s11120-013-9887-1
https://doi.org/10.1007/s11120-013-9887-1
Publikováno v:
Photosynthesis Research. 120:87-98
This review presents a broad overview of the research that enabled the structure determination of the bacterial reaction centers from Blastochloris viridis and Rhodobacter sphaeroides, with a focus on the contributions from Duysens, Clayton, and Fehe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::63c8123c23829c1004bcc15121b22a3e
https://doi.org/10.1007/s11120-013-9821-6
https://doi.org/10.1007/s11120-013-9821-6