5JTL

The structure of chaperone SecB in complex with unstructured proPhoA


Experimental Data Snapshot

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

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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
  • Primary Citation of Related Structures:  
    5JTP, 5JTO, 5JTR, 5JTQ, 5JTL, 5JTN, 5JTM

  • 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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Protein-export protein SecBABCD155Escherichia coli O157:H7Mutation(s): 0 
Gene Names: secBZ5036ECs4487
Find proteins for P0AG86 (Escherichia coli (strain K12))
Explore P0AG86 
Go to UniProtKB:  P0AG86
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Alkaline phosphataseE471Escherichia coli K-12Mutation(s): 0 
Gene Names: phoAb0383JW0374
EC: 3.1.3.1
Find proteins for P00634 (Escherichia coli (strain K12))
Explore P00634 
Go to UniProtKB:  P00634
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

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

Structure Validation

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Entry History 

Deposition Data

Revision History 

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