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6UTI

Allosteric coupling between alpha-rings of 20S proteasome, 20S proteasome with singly capped PAN complex

Summary for 6UTI
Entry DOI10.2210/pdb6uti/pdb
EMDB information20877 20878 20879 20880 20881
DescriptorProteasome subunit alpha, Proteasome subunit beta (3 entities in total)
Functional Keywordspan, proteasome, singly-capped, hydrolase
Biological sourceThermoplasma acidophilum
More
Total number of polymer chains28
Total formula weight663171.59
Authors
Cheng, Y.,Yu, Z. (deposition date: 2019-10-29, release date: 2020-09-09, Last modification date: 2024-03-06)
Primary citationYu, Z.,Yu, Y.,Wang, F.,Myasnikov, A.G.,Coffino, P.,Cheng, Y.
Allosteric coupling between alpha-rings of the 20S proteasome.
Nat Commun, 11:4580-4580, 2020
Cited by
PubMed Abstract: Proteasomal machinery performs essential regulated protein degradation in eukaryotes. Classic proteasomes are symmetric, with a regulatory ATPase docked at each end of the cylindrical 20S. Asymmetric complexes are also present in cells, either with a single ATPase or with an ATPase and non-ATPase at two opposite ends. The mechanism that populates these different proteasomal complexes is unknown. Using archaea homologs, we construct asymmetric forms of proteasomes. We demonstrate that the gate conformation of the two opposite ends of 20S are coupled: binding one ATPase opens a gate locally, and also opens the opposite gate allosterically. Such allosteric coupling leads to cooperative binding of proteasomal ATPases to 20S and promotes formation of proteasomes symmetrically configured with two identical ATPases. It may also promote formation of asymmetric complexes with an ATPase and a non-ATPase at opposite ends. We propose that in eukaryotes a similar mechanism regulates the composition of the proteasomal population.
PubMed: 32917864
DOI: 10.1038/s41467-020-18415-7
PDB entries with the same primary citation
Experimental method
ELECTRON MICROSCOPY (3.4 Å)
Structure validation

227561

数据于2024-11-20公开中

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