2e31
From Proteopedia
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==Overview== | ==Overview== | ||
| - | The ubiquitin ligase complex SCF(Fbs1), which contributes to the | + | The ubiquitin ligase complex SCF(Fbs1), which contributes to the ubiquitination of glycoproteins, is involved in the endoplasmic reticulum-associated degradation pathway. In SCF ubiquitin ligases, a diverse array of F-box proteins confers substrate specificity. Fbs1/Fbx2, a member of the F-box protein family, recognizes high-mannose oligosaccharides. To elucidate the structural basis of SCF(Fbs1) function, we determined the crystal structures of the Skp1-Fbs1 complex and the sugar-binding domain (SBD) of the Fbs1-glycoprotein complex. The mechanistic model indicated by the structures appears to be well conserved among the SCF ubiquitin ligases. The structure of the SBD-glycoprotein complex indicates that the SBD primarily recognizes Man(3)GlcNAc(2), thereby explaining the broad activity of the enzyme against various glycoproteins. Comparison of two crystal structures of the Skp1-Fbs1 complex revealed the relative motion of a linker segment between the F-box and the SBD domains, which might underlie the ability of the complex to recognize different acceptor lysine residues for ubiquitination. |
==About this Structure== | ==About this Structure== | ||
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==Reference== | ==Reference== | ||
| - | Structural basis for the selection of glycosylated substrates by | + | Structural basis for the selection of glycosylated substrates by SCF(Fbs1) ubiquitin ligase., Mizushima T, Yoshida Y, Kumanomidou T, Hasegawa Y, Suzuki A, Yamane T, Tanaka K, Proc Natl Acad Sci U S A. 2007 Apr 3;104(14):5777-81. Epub 2007 Mar 26. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=17389369 17389369] |
[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
[[Category: Mus musculus]] | [[Category: Mus musculus]] | ||
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[[Category: ubiquitin ligase]] | [[Category: ubiquitin ligase]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 17:05:23 2008'' |
Revision as of 15:05, 21 February 2008
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Structural basis for selection of glycosylated substrate by SCFFbs1 ubiquitin ligase
Overview
The ubiquitin ligase complex SCF(Fbs1), which contributes to the ubiquitination of glycoproteins, is involved in the endoplasmic reticulum-associated degradation pathway. In SCF ubiquitin ligases, a diverse array of F-box proteins confers substrate specificity. Fbs1/Fbx2, a member of the F-box protein family, recognizes high-mannose oligosaccharides. To elucidate the structural basis of SCF(Fbs1) function, we determined the crystal structures of the Skp1-Fbs1 complex and the sugar-binding domain (SBD) of the Fbs1-glycoprotein complex. The mechanistic model indicated by the structures appears to be well conserved among the SCF ubiquitin ligases. The structure of the SBD-glycoprotein complex indicates that the SBD primarily recognizes Man(3)GlcNAc(2), thereby explaining the broad activity of the enzyme against various glycoproteins. Comparison of two crystal structures of the Skp1-Fbs1 complex revealed the relative motion of a linker segment between the F-box and the SBD domains, which might underlie the ability of the complex to recognize different acceptor lysine residues for ubiquitination.
About this Structure
2E31 is a Protein complex structure of sequences from Homo sapiens and Mus musculus. Full crystallographic information is available from OCA.
Reference
Structural basis for the selection of glycosylated substrates by SCF(Fbs1) ubiquitin ligase., Mizushima T, Yoshida Y, Kumanomidou T, Hasegawa Y, Suzuki A, Yamane T, Tanaka K, Proc Natl Acad Sci U S A. 2007 Apr 3;104(14):5777-81. Epub 2007 Mar 26. PMID:17389369
Page seeded by OCA on Thu Feb 21 17:05:23 2008
Categories: Homo sapiens | Mus musculus | Protein complex | Hasegawa, Y. | Kumanomidou, T. | Mizushima, T. | Tanaka, K. | Yamane, T. | Yoshida, Y. | Fbs1 | Scf | Ubiquitin | Ubiquitin ligase
