Reactome: A Curated Pathway Database

HSPA8-mediated ATP hydrolysis promotes vesicle uncoating

Stable Identifier
R-HSA-8868658
Type
Reaction
Species
Homo sapiens
Compartment
Locations in the PathwayBrowser
Summation

HSPA8 hydrolyzes ATP to promote dissociation of the clathrin coat from the vesicle (reviewed in Sousa and Lafer, 2015). Interaction of HSPA8 with the C-terminal tail of clathrin may sterically block re-stabilization of the clathrin coat, which is thought to undergo transient cycles of 'breathing', or loosening of the interactions between the triskelions (Barouch et al, 1997; Rapoport et al, 2008; Xing et al, 2010). Alternately, HSPA8 may destabilize the clathrin coat through intermolecular collisions with the coat (reveiwed in Sousa and Lafer, 2015). The HSPA8-clathrin interaction persists once clathrin has been removed from the vesicle. This is thought to preclude aberrant repolymerization of clathrin by sequestering free clathrin (Schlossman et al, 1984; reviewed in Sousa and Lafer, 2015).

Literature References
Participants
Participant Of
This entity is regulated by:
Title Physical Entity Activity
ATPase activity of PI(4)P:p-T156 AP-2:clathrin:ITSNs:EPS15:REPS1:SGIP1:NECAPs:AAK1:CLASP proteins:cargo:F-BAR proteins:BAR domain proteins:ARP2/3 complex:WASL:f-actin:HIP dimers:DNM:GDP:SYNJs:auxilin:HSPA8:ATP [clathrin-coated vesicle membrane] PI(4)P:p-T156 AP-2:clathrin:ITSNs:EPS15:REPS1:SGIP1:NECAPs:AAK1:CLASP proteins:cargo:F-BAR proteins:BAR domain proteins:ARP2/3 complex:WASL:f-actin:HIP dimers:DNM:GDP:SYNJs:auxilin:HSPA8:ATP [clathrin-coated vesicle membrane] ATPase activity (0016887)
Orthologous Events