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8ST7

Structure of E3 ligase VsHECT bound to ubiquitin

Summary for 8ST7
Entry DOI10.2210/pdb8st7/pdb
DescriptorUbiquitin, E3 ubiquitin-protein ligase SopA-like catalytic domain-containing protein, prop-2-en-1-amine, ... (4 entities in total)
Functional Keywordse3 ubiquitin ligase, ligase, transferase
Biological sourceHomo sapiens (human)
More
Total number of polymer chains4
Total formula weight69377.15
Authors
Franklin, T.G.,Pruneda, J.N. (deposition date: 2023-05-09, release date: 2023-07-12, Last modification date: 2024-01-03)
Primary citationFranklin, T.G.,Brzovic, P.S.,Pruneda, J.N.
Bacterial ligases reveal fundamental principles of polyubiquitin specificity.
Mol.Cell, 83:4538-4554.e4, 2023
Cited by
PubMed Abstract: Homologous to E6AP C terminus (HECT) E3 ubiquitin (Ub) ligases direct substrates toward distinct cellular fates dictated by the specific form of monomeric or polymeric Ub (polyUb) signal attached. How polyUb specificity is achieved has been a long-standing mystery, despite extensive study in various hosts, ranging from yeast to human. The bacterial pathogens enterohemorrhagic Escherichia coli and Salmonella Typhimurium encode outlying examples of "HECT-like" (bHECT) E3 ligases, but commonalities to eukaryotic HECT (eHECT) mechanism and specificity had not been explored. We expanded the bHECT family with examples in human and plant pathogens. Three bHECT structures in primed, Ub-loaded states resolved key details of the entire Ub ligation process. One structure provided a rare glimpse into the act of ligating polyUb, yielding a means to rewire polyUb specificity of both bHECT and eHECT ligases. Studying this evolutionarily distinct bHECT family has revealed insight into the function of key bacterial virulence factors as well as fundamental principles underlying HECT-type Ub ligation.
PubMed: 38091999
DOI: 10.1016/j.molcel.2023.11.017
PDB entries with the same primary citation
Experimental method
X-RAY DIFFRACTION (1.44 Å)
Structure validation

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