Functional specificity of E2F3 isoforms
E2F3 is a central transcription factor driving cell cycle progression, with important roles in differentiation, development, and cancer.
Although most studies consider E2F3 a single entity, the E2F3 gene locus produces two isoforms with many overlapping, opposite, and unique functions.
E2F3A and E2F3B are not simply activator or repressor isoforms and despite significant plasticity in development, they possess unique roles in different contexts.
The specificity of E2F3A and E2F3B arises from structural divergence, different promoter architecture, protein stability, cofactor interactions, chromatin context, and spatiotemporal expression patterns.
Dissecting the isoform-specific functions of E2F3 will rely on new developments in single-cell techniques, chromatin accessibility profiling, and endogenous protein tagging, giving unprecedented levels of temporal and cellular resolution.
https://www.cell.com/trends/cell-biology/fulltext/S0962-8924(26)00211-4
