Conformational Dynamics of Bacteriochlorophyll <i>c</i> in Chlorosomes from the <i>bchQ</i> Mutant of <i>Chlorobaculum tepidum</i>.

ABSTRACT: In contrast to the common viewpoint that bacteriochlorophyll (BChl) motion is largely absent within the chlorosome assembly, physics-based modeling points to a crucial role of the nanoscale librational motion of the macrocycle for the transfer of excitons. To elucidate this motion experimentally, compositional uniformity and high sensitivity are required. We focused on uniformly ¹³C labeled chlorosome preparations from the bchQ mutant Chlorobaculum tepidum with significantly enhanced structural homogeneity. The librational motion is characterized using Rotational Echo DOuble Resonance (REDOR), and in addition, the impact of temperature on specific functionalities within BChl molecules is studied with 1-dimensional and 2-dimensional dipolar and scalar-based MAS NMR

SUBMITTER: Dsouza L 

PROVIDER: S-EPMC11873974 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature