Structural Basis for ESCRT-III Protein Autoinhibition

ESCRT-III proteins play important roles in multivesicular body (MVB) formation, cytokinesis, and enveloped virus budding. The structure of Ist1, which also functions in cytokinesis and MVB sorting, reveals that it, too, is an ESCRT-III family member and suggests that this protein family uses a common mode of autoinhibition.