How the pH Controls Photoprotection in the Light-Harvesting Complex of Mosses.

ABSTRACT: In response to varying light conditions, light-harvesting complexes (LHCs) switch from a light-harvesting state to a quenched state to protect the photosynthetic organism from excessive light irradiation in a strategy known as nonphotochemical quenching (NPQ). NPQ is activated by an acidification of the thylakoid lumen, which is sensed directly or indirectly by the LHC, resulting in a conformational change of the complex that leads to the quenched state. The conformational changes responsible for NPQ activation and their connection to specific quenching mechanisms are still unknown. Here, we investigate the pH-triggered conformational changes in the light-harvesting complex stress-related (LHCSR) of mosses. By combining constant-pH molecular dynamics and enhanced sampling techniques, we fi

SUBMITTER: Pedraza-Gonzalez L 

PROVIDER: S-EPMC10080688 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature