5JTQ

The structure of chaperone SecB in complex with unstructured MBP binding site d


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural basis for the antifolding activity of a molecular chaperone.

Huang, C.Rossi, P.Saio, T.Kalodimos, C.G.

(2016) Nature 537: 202-206

  • DOI: 10.1038/nature18965
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Molecular chaperones act on non-native proteins in the cell to prevent their aggregation, premature folding or misfolding. Different chaperones often exert distinct effects, such as acceleration or delay of folding, on client proteins via mechanisms ...

    Molecular chaperones act on non-native proteins in the cell to prevent their aggregation, premature folding or misfolding. Different chaperones often exert distinct effects, such as acceleration or delay of folding, on client proteins via mechanisms that are poorly understood. Here we report the solution structure of SecB, a chaperone that exhibits strong antifolding activity, in complex with alkaline phosphatase and maltose-binding protein captured in their unfolded states. SecB uses long hydrophobic grooves that run around its disk-like shape to recognize and bind to multiple hydrophobic segments across the length of non-native proteins. The multivalent binding mode results in proteins wrapping around SecB. This unique complex architecture alters the kinetics of protein binding to SecB and confers strong antifolding activity on the chaperone. The data show how the different architectures of chaperones result in distinct binding modes with non-native proteins that ultimately define the activity of the chaperone.


    Organizational Affiliation

    Department of Biochemistry, Molecular Biology &Biophysics, University of Minnesota, Minneapolis, Minnesota 55455, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Maltose-binding periplasmic protein
E, F
42Escherichia coli O157:H7Mutation(s): 0 
Gene Names: malEZ5632ECs5017
Find proteins for P0AEY0 (Escherichia coli O157:H7)
Go to UniProtKB:  P0AEY0

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein-export protein SecB
A, B, C, D
155Escherichia coli O157:H7Mutation(s): 0 
Gene Names: secBZ5036ECs4487
Find proteins for P0AG88 (Escherichia coli O157:H7)
Go to UniProtKB:  P0AG88
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 
  • OLDERADO: 5JTQ Olderado

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-08-24
    Type: Initial release
  • Version 1.1: 2016-09-21
    Changes: Database references