Matthew P. Johnson
University of Sheffield
311 Papers
1.6K Citations
Matthew P. Johnson is an academic researcher from University of Sheffield. The author has contributed to research in topics: Thylakoid & Photosystem II. The author has an hindex of 39, co-authored 268 publications. Previous affiliations of Matthew P. Johnson include Columbia University & University of California, Berkeley.
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Papers
The photoprotective molecular switch in the photosystem II antenna
TL;DR: It is suggested how PsbS and xanthophylls may exert control over qE by controlling the affinity of LHCII complexes for protons with reference to the concepts of hydrophobicity, allostery and hysteresis.
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Photoprotective Energy Dissipation Involves the Reorganization of Photosystem II Light-Harvesting Complexes in the Grana Membranes of Spinach Chloroplasts
Matthew P. Johnson,Tomasz K. Goral,Christopher D. P. Duffy,Anthony P.R. Brain,Conrad W. Mullineaux,Alexander V. Ruban +5 more
TL;DR: An investigation into the structural basis of light-harvesting regulation in intact spinach chloroplasts using freeze-fracture electron microscopy, combined with laser confocal microscopy employing the fluorescence recovery after photobleaching technique demonstrates that formation of the photoprotective state requires a structural reorganization of the photosynthetic membrane involving dissociation of LHCII from PSII and its aggregation.
Elevated Zeaxanthin Bound to Oligomeric LHCII Enhances the Resistance of Arabidopsis to Photooxidative Stress by a Lipid-protective, Antioxidant Mechanism
Matthew P. Johnson,Michel Havaux,Christian Triantaphylidès,Brigitte Ksas,Andrew A. Pascal,Bruno Robert,Paul A. Davison,Alexander V. Ruban,Peter Horton +8 more
TL;DR: It is suggested that the protein/lipid interface is the active site for the antioxidant activity of zeaxanthin, which mediates stress tolerance by the protection of bound lipids in transformed plants.
193
Borrowing Constraints, College Enrollment, and Delayed Entry
TL;DR: This article examined the effect of relaxing borrowing constraints on educational attainment by simulating increases in the amount students are permitted to borrow from government-sponsored loan programs and found that borrowing constraints have a small impact on attainment: the removal of education related borrowing constraints raises bachelor's degree completion by 2.4 percentage points.
Light-harvesting antenna composition controls the macrostructure and dynamics of thylakoid membranes in Arabidopsis
Tomasz K. Goral,Matthew P. Johnson,Christopher D. P. Duffy,Anthony P.R. Brain,Alexander V. Ruban,Conrad W. Mullineaux +5 more
TL;DR: It is suggested that a key feature of the physiological function of PsbS is to decrease the formation of ordered semi-crystalline arrays of Photosystem II in the low-light state, accelerating the re-organization of the photosystem II macrostructure that is necessary for induction of non-photochemical quenching.
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