What does it usually mean when an actin filament has an ATP

Last updated: 7/23/2022

What does it usually mean when an actin filament has an ATP cap? The actin filament has actin covalently bound to ATP via a phosphodiester bond at the plus end. The actin filament has additional ATP molecules added onto its actin-ATP units at the plus end to stabilize the filament and prevent dynamic instability. The actin filament has additional ATP molecules added onto its actin-ATP units at the plus end to stabilize the filament and prevent treadmilling. The actin filament has actin bound to ATP at the plus end.