Macromolecule Content

• Total Structure Weight: 7.48 kDa 
• Atom Count: 529 
• Residue Count: 64 
• Unique protein chains: 1

2DT6

Solution structure of the first SURP domain of human splicing factor SF3a120

• DOI: 10.2210/pdb2DT6/pdb
• BMRB: 11364

• Classification: RNA BINDING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2006-07-11 Released: 2006-12-26 
• Deposition Author(s): Kuwasako, K., He, F., Inoue, M., Tanaka, A., Sugano, S., Guentert, P., Muto, Y., Yokoyama, S., RIKEN Structural Genomics/Proteomics Initiative (RSGI)

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the least restraint violations, structures with the lowest energy 

Literature

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., Guentert, P., Muto, Y., Yokoyama, S.

(2006) Structure 14: 1677-1689

• PubMed: 17098193 
• DOI: 10.1016/j.str.2006.09.009
• Primary Citation of Related Structures:  
  2DT7, 2DT6


• PubMed Abstract: 
  

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.

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Organizational Affiliation: 

Protein Research Group, Yokohama 230-0045, Japan.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Splicing factor 3 subunit 1	A	64	Homo sapiens	Mutation(s): 0  Gene Names: SF3a120, SF3A1, SAP114
Find proteins for Q15459 (Homo sapiens) Explore Q15459  Go to UniProtKB:  Q15459
NIH Common Fund Data Resources
PHAROS:  Q15459 GTEx:  ENSG00000099995

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the least restraint violations, structures with the lowest energy 
• OLDERADO: 2DT6 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2006-07-11 
• Released Date: 2006-12-26 
Deposition Author(s): Kuwasako, K., He, F., Inoue, M., Tanaka, A., Sugano, S., Guentert, P., Muto, Y., Yokoyama, S., RIKEN Structural Genomics/Proteomics Initiative (RSGI)

Revision History 

• Version 1.0: 2006-12-26
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance