Identifying Novel Enhancer Elements with CRISPR-Based Screens.

Enhancers control the spatiotemporal expression of genes and are essential for encoding differentiation and development. Since their discovery more than three decades ago, researchers have largely studied enhancers removed from their genomic context. The recent adaptation of CRISPR/Cas9 to genome editing in higher organisms now allows researchers to perturb and test these elements in their genomic context, through both mutation and epigenetic modulation. In this Perspective, we discuss recent advances in scanning noncoding regions of the genome for enhancer activity using CRISPR-based tools.