Matthew P. Johnson

Cryo-EM structures of Cereibacter sphaeroides ferrochelatase reveal an oligomeric state that occludes the substrate-binding site

This study determines the cryo-EM structures of Cereibacter sphaeroides ferrochelatase, revealing oligomeric states that occlude the substrate-binding site.

A 13-subunit c-ring in the Chlamydomonas chloroplast ATP synthase lowers the H⁺/ATP cost of carbon fixation

This paper reports a 13-subunit c-ring in the Chlamydomonas chloroplast ATP synthase, which lowers the H+/ATP cost of carbon fixation compared to the 14-subunit structure in spinach.

Disequilibrium between chloroplast proton motive force and ATP levels in Arabidopsis

The paper shows that in Arabidopsis pgr5CAS mutant, proton motive force is reduced but MgATP2- levels remain unchanged, suggesting PGR5-CET is not needed for ATP augmentation.

Loss of PSAE redirects PGRL1 to photosystem I and enhances PGR5-dependent cyclic electron transfer in Arabidopsis

This study shows that loss of PSAE in Arabidopsis enhances PGR5-dependent cyclic electron transfer and redirects PGRL1 to PSI, while NDH supports CO2 fixation under disrupted PSI conditions.

Tethering ferredoxin-NADP+ reductase to photosystem I promotes photosynthetic cyclic electron transfer

This study shows that tethering FNR to PSI in Chlamydomonas reinhardtii promotes CET over LET, reducing CO2 fixation.

Molecular architecture of thylakoid membranes within intact spinach chloroplasts

This study uses cryo-ET and AI-based methods to analyze thylakoid membrane organization in spinach chloroplasts, revealing similarities to green algae despite differences in 3D architecture.