5F5V

Crystal structure of the Snu23-Prp38-MFAP1(217-296) complex of Chaetomium thermophilum


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.347 
  • R-Value Work: 0.295 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Scaffolding in the Spliceosome via Single alpha Helices.

Ulrich, A.K.C.Seeger, M.Schutze, T.Bartlick, N.Wahl, M.C.

(2016) Structure 24: 1972-1983

  • DOI: 10.1016/j.str.2016.09.007
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The spliceosomal B complex-specific protein Prp38 forms a complex with the intrinsically unstructured proteins MFAP1 and Snu23. Our binding and crystal structure analyses show that MFAP1 and Snu23 contact Prp38 via ER/K motif-stabilized single α heli ...

    The spliceosomal B complex-specific protein Prp38 forms a complex with the intrinsically unstructured proteins MFAP1 and Snu23. Our binding and crystal structure analyses show that MFAP1 and Snu23 contact Prp38 via ER/K motif-stabilized single α helices, which have previously been recognized only as rigid connectors or force springs between protein domains. A variant of the Prp38-binding single α helix of MFAP1, in which ER/K motifs not involved in Prp38 binding were mutated, was less α-helical in isolation and showed a reduced Prp38 affinity, with opposing tendencies in interaction enthalpy and entropy. Our results indicate that the strengths of single α helix-based interactions can be tuned by the degree of helix stabilization in the unbound state. MFAP1, Snu23, and several other spliceosomal proteins contain multiple regions that likely form single α helices via which they might tether several binding partners and act as intermittent scaffolds that facilitate remodeling steps during assembly of an active spliceosome.


    Organizational Affiliation

    Laboratory of Structural Biochemistry, Freie Universität Berlin, Takustraße 6, 14195 Berlin, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Prp38
A, D
223Chaetomium thermophilum (strain DSM 1495 / CBS 144.50 / IMI 039719)Mutation(s): 0 
Find proteins for G0S1D3 (Chaetomium thermophilum (strain DSM 1495 / CBS 144.50 / IMI 039719))
Go to UniProtKB:  G0S1D3
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Putative uncharacterized protein
B, E
84Chaetomium thermophilum (strain DSM 1495 / CBS 144.50 / IMI 039719)Mutation(s): 0 
Find proteins for G0SHD7 (Chaetomium thermophilum (strain DSM 1495 / CBS 144.50 / IMI 039719))
Go to UniProtKB:  G0SHD7
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Zinc finger domain-containing protein
C, F
36Chaetomium thermophilum (strain DSM 1495 / CBS 144.50 / IMI 039719)Mutation(s): 0 
Find proteins for G0S6R0 (Chaetomium thermophilum (strain DSM 1495 / CBS 144.50 / IMI 039719))
Go to UniProtKB:  G0S6R0
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.347 
  • R-Value Work: 0.295 
  • Space Group: P 32
Unit Cell:
Length (Å)Angle (°)
a = 84.810α = 90.00
b = 84.810β = 90.00
c = 96.390γ = 120.00
Software Package:
Software NamePurpose
XDSdata reduction
PHASERphasing
PDB_EXTRACTdata extraction
XSCALEdata scaling
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
German Research FoundationGermanyWA1126/7-1

Revision History 

  • Version 1.0: 2016-10-12
    Type: Initial release
  • Version 1.1: 2017-09-06
    Type: Author supporting evidence, Data collection
  • Version 1.2: 2018-04-18
    Type: Data collection, Database references