Abstract
The SCF E3 ubiquitin ligases select specific proteins for ubiquitination (and typically destruction) by coupling variable adaptor (F box) proteins that bind protein substrates to a conserved catalytic engine containing a cullin, Cul1, and the Rbx1/Roc1 RING finger protein. A new crystal structure of the SCF(Skp2) ubiquitin ligase shows the molecular organization of this complex and raises important questions as to how substrate ubiquitination is accomplished.
MeSH terms
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Cell Cycle Proteins / metabolism
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Crystallography, X-Ray
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Cullin Proteins*
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Humans
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Models, Molecular
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Peptide Synthases / chemistry
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Peptide Synthases / physiology*
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Protein Binding
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Protein Conformation
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Protein Structure, Quaternary
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S-Phase Kinase-Associated Proteins
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SKP Cullin F-Box Protein Ligases
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Structure-Activity Relationship
Substances
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Cell Cycle Proteins
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Cullin 1
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Cullin Proteins
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S-Phase Kinase-Associated Proteins
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SKP Cullin F-Box Protein Ligases
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Peptide Synthases