2dt7
From Proteopedia
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==Overview== | ==Overview== | ||
| - | The SF3a complex, consisting of SF3a60, SF3a66, and SF3a120, in 17S U2 | + | The SF3a complex, consisting of SF3a60, SF3a66, and SF3a120, in 17S U2 snRNP is crucial to spliceosomal assembly. SF3a120 contains two tandem SURP domains (SURP1 and SURP2), and SURP2 is responsible for binding to SF3a60. We found that the SURP2 fragment forms a stable complex with an SF3a60 fragment (residues 71-107) and solved its structure by NMR spectroscopy. SURP2 exhibits a fold of the alpha1-alpha2-3(10)-alpha3 topology, and the SF3a60 fragment forms an amphipathic alpha helix intimately contacting alpha1 of SURP2. We also solved the SURP1 structure, which has the same fold as SURP2. The protein-binding interface of SURP2 is quite similar to the corresponding surface of SURP1, except for two amino acid residues. One of them, Leu169, is characteristic of SF3a120 SURP2 among SURP domains. Mutagenesis showed that this single Leu residue is the critical determinant for complex formation, which reveals the protein recognition mechanism in the subunit assembly. |
==About this Structure== | ==About this Structure== | ||
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[[Category: Kuwasako, K.]] | [[Category: Kuwasako, K.]] | ||
[[Category: Muto, Y.]] | [[Category: Muto, Y.]] | ||
| - | [[Category: RSGI, RIKEN | + | [[Category: RSGI, RIKEN Structural Genomics/Proteomics Initiative.]] |
[[Category: Yokoyama, S.]] | [[Category: Yokoyama, S.]] | ||
[[Category: national project on protein structural and functional analyses]] | [[Category: national project on protein structural and functional analyses]] | ||
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[[Category: surp domain]] | [[Category: surp domain]] | ||
| - | ''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 17:02:21 2008'' |
Revision as of 15:02, 21 February 2008
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Solution structure of the second SURP domain of human splicing factor SF3a120 in complex with a fragment of human splicing factor SF3a60
Overview
The SF3a complex, consisting of SF3a60, SF3a66, and SF3a120, in 17S U2 snRNP is crucial to spliceosomal assembly. SF3a120 contains two tandem SURP domains (SURP1 and SURP2), and SURP2 is responsible for binding to SF3a60. We found that the SURP2 fragment forms a stable complex with an SF3a60 fragment (residues 71-107) and solved its structure by NMR spectroscopy. SURP2 exhibits a fold of the alpha1-alpha2-3(10)-alpha3 topology, and the SF3a60 fragment forms an amphipathic alpha helix intimately contacting alpha1 of SURP2. We also solved the SURP1 structure, which has the same fold as SURP2. The protein-binding interface of SURP2 is quite similar to the corresponding surface of SURP1, except for two amino acid residues. One of them, Leu169, is characteristic of SF3a120 SURP2 among SURP domains. Mutagenesis showed that this single Leu residue is the critical determinant for complex formation, which reveals the protein recognition mechanism in the subunit assembly.
About this Structure
2DT7 is a Protein complex structure of sequences from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Solution structures of the SURP domains and the subunit-assembly mechanism within the splicing factor SF3a complex in 17S U2 snRNP., Kuwasako K, He F, Inoue M, Tanaka A, Sugano S, Guntert P, Muto Y, Yokoyama S, Structure. 2006 Nov;14(11):1677-89. PMID:17098193
Page seeded by OCA on Thu Feb 21 17:02:21 2008
Categories: Homo sapiens | Protein complex | Guntert, P. | He, F. | Inoue, M. | Kuwasako, K. | Muto, Y. | RSGI, RIKEN Structural Genomics/Proteomics Initiative. | Yokoyama, S. | National project on protein structural and functional analyses | Nmr | Nppsfa | Riken structural genomics/proteomics initiative | Rsgi | Sf3a120 | Sf3a60 | Structural genomics | Structure genomics | Surp domain
