6D6S

Solution structure of Trigger Factor dimer


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 800 
  • 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

Oligomerization of a molecular chaperone modulates its activity.

Saio, T.Kawagoe, S.Ishimori, K.Kalodimos, C.G.

(2018) Elife 7

  • DOI: 10.7554/eLife.35731
  • Primary Citation of Related Structures:  
    6D6S

  • PubMed Abstract: 
  • Molecular chaperones alter the folding properties of cellular proteins via mechanisms that are not well understood. Here, we show that Trigger Factor (TF), an ATP-independent chaperone, exerts strikingly contrasting effects on the folding of non-native proteins as it transitions between a monomeric and a dimeric state ...

    Molecular chaperones alter the folding properties of cellular proteins via mechanisms that are not well understood. Here, we show that Trigger Factor (TF), an ATP-independent chaperone, exerts strikingly contrasting effects on the folding of non-native proteins as it transitions between a monomeric and a dimeric state. We used NMR spectroscopy to determine the atomic resolution structure of the 100 kDa dimeric TF. The structural data show that some of the substrate-binding sites are buried in the dimeric interface, explaining the lower affinity for protein substrates of the dimeric compared to the monomeric TF. Surprisingly, the dimeric TF associates faster with proteins and it exhibits stronger anti-aggregation and holdase activity than the monomeric TF. The structural data show that the dimer assembles in a way that substrate-binding sites in the two subunits form a large contiguous surface inside a cavity, thus accounting for the observed accelerated association with unfolded proteins. Our results demonstrate how the activity of a chaperone can be modulated to provide distinct functional outcomes in the cell.


    Organizational Affiliation

    Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, United States.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Trigger factorA, B443Escherichia coli K-12Mutation(s): 0 
Gene Names: tigb0436JW0426
EC: 5.2.1.8
UniProt
Find proteins for P0A850 (Escherichia coli (strain K12))
Explore P0A850 
Go to UniProtKB:  P0A850
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 800 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 
  • OLDERADO: 6D6S Olderado

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)United StatesR35 GM122462
Japan Science and TechnologyJapanPRESTO
Japan Society for the Promotion of Science (JSPS)JapanKAKENHI (17H05657)

Revision History  (Full details and data files)

  • Version 1.0: 2018-06-13
    Type: Initial release
  • Version 1.1: 2019-12-18
    Changes: Author supporting evidence, Data collection