Evolving Models for Assembling and Shaping Clathrin-coated Pits
Overview
Authors
Affiliations
Clathrin-mediated endocytosis occurs via the assembly of clathrin-coated pits (CCPs) that invaginate and pinch off to form clathrin-coated vesicles (CCVs). It is well known that adaptor protein 2 (AP2) complexes trigger clathrin assembly on the plasma membrane, and biochemical and structural studies have revealed the nature of these interactions. Numerous endocytic accessory proteins collaborate with clathrin and AP2 to drive CCV formation. However, many questions remain as to the molecular events involved in CCP initiation, stabilization, and curvature generation. Indeed, a plethora of recent evidence derived from cell perturbation, correlative light and EM tomography, live-cell imaging, modeling, and high-resolution structural analyses has revealed more complexity and promiscuity in the protein interactions driving CCP maturation than anticipated. After briefly reviewing the evidence supporting prevailing models, we integrate these new lines of evidence to develop a more dynamic and flexible model for how redundant, dynamic, and competing protein interactions can drive endocytic CCV formation and suggest new approaches to test emerging models.
Clathrin-associated carriers enable recycling through a kiss-and-run mechanism.
Xu J, Liang Y, Li N, Dang S, Jiang A, Liu Y Nat Cell Biol. 2024; 26(10):1652-1668.
PMID: 39300312 DOI: 10.1038/s41556-024-01499-4.
Ubiquitin-driven protein condensation stabilizes clathrin-mediated endocytosis.
Yuan F, Gollapudi S, Day K, Ashby G, Sangani A, Malady B PNAS Nexus. 2024; 3(9):pgae342.
PMID: 39253396 PMC: 11382290. DOI: 10.1093/pnasnexus/pgae342.
Vesiculation pathways in clathrin-mediated endocytosis.
Wang X, Berro J, Ma R bioRxiv. 2024; .
PMID: 39185216 PMC: 11343097. DOI: 10.1101/2024.08.13.607731.
Diversity, Origin and Evolution of the ESCRT Systems.
Makarova K, Tobiasson V, Wolf Y, Lu Z, Liu Y, Zhang S bioRxiv. 2024; .
PMID: 38903064 PMC: 11188069. DOI: 10.1101/2024.02.06.579148.
Primary Human Breast Cancer-Associated Endothelial Cells Favor Interactions with Nanomedicines.
Wang L, Sheth V, Liu K, Panja P, Frickenstein A, He Y Adv Mater. 2024; 36(28):e2403986.
PMID: 38663008 PMC: 11239290. DOI: 10.1002/adma.202403986.