Sll1466, a glycosyl transferase homolog involved in global cellular regulation and high-light tolerance of Synechocystis PCC6803

► Sll1466 interacts with the loop domain of core-membrane linker. ► Phototrophic growth of the Sll1466 knock-out mutant is sensitive to light. ► A smaller size and higher mobility of phycobilisomes in the Sll1466 knock-out mutant. ► A changed lipid composition of the thylakoid membrane in the Sll1466 knock-out mutant.