REGULATION OF CLATHRIN ASSEMBLY AND TRIMERIZATION DEFINED USING RECOMBINANT TRISKELION HUBS

REGULATION OF CLATHRIN ASSEMBLY AND TRIMERIZATION DEFINED USING RECOMBINANT TRISKELION HUBS
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DOI:
10.1016/0092-8674(95)90167-1
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发表时间:
1995-10-20
期刊:
影响因子:
64.5
通讯作者:
BRODSKY, FM
BRODSKY, FM
中科院分区:
生物学1区
文献类型:
--
作者:
LIU, SH;WONG, ML;BRODSKY, FM

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Clathrin polymerization into a polyhedral vesicle coat drives receptor sorting at cellular membranes during endocytosis and organelle biogenesis. To study clathrin self-assembly, we expressed the C-terminal third of the clathrin heavy chain in bacteria. The recombinant fragment trimerized, bound clathrin light chains, and morphologically resembled the hub domain of the triskelion-shaped clathrin molecule. Self-assembly of recombinant hubs demonstrated a regulatory role for clathrin light chains and for the distal portions of triskelion legs in clathrin coat formation. Deletion mutagenesis of the hub localized a domain mediating light chain binding and clathrin self-assembly and mapped a transferable trimerization domain. These studies define molecular interactions controlling clathrin self-assembly and establish a recombinant system for future analysis.