Nanoscale regulation of Ca²⁺ dependent phase transitions and real-time dynamics of SAP97/hDLG.

ABSTRACT: Synapse associated protein-97/Human Disk Large (SAP97/hDLG) is a conserved, alternatively spliced, modular, scaffolding protein critical in regulating the molecular organization of cell-cell junctions in vertebrates. We confirm that the molecular determinants of first order phase transition of SAP97/hDLG is controlled by morpho-functional changes in its nanoscale organization. Furthermore, the nanoscale molecular signatures of these signalling islands and phase transitions are altered in response to changes in cytosolic Ca²⁺. Additionally, exchange kinetics of alternatively spliced isoforms of the intrinsically disordered region in SAP97/hDLG C-terminus shows differential sensitivities to Ca²⁺ bound Calmodulin, affirming that the molecular signatures of local phase tr

SUBMITTER: Rajeev P 

PROVIDER: S-EPMC9307800 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature