4JN4

Allosteric opening of the polypeptide-binding site when an Hsp70 binds ATP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.197 
  • R-Value Work: 0.162 
  • R-Value Observed: 0.164 

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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Allosteric opening of the polypeptide-binding site when an Hsp70 binds ATP.

Qi, R.Sarbeng, E.B.Liu, Q.Le, K.Q.Xu, X.Xu, H.Yang, J.Wong, J.L.Vorvis, C.Hendrickson, W.A.Zhou, L.Liu, Q.

(2013) Nat Struct Mol Biol 20: 900-907

  • DOI: 10.1038/nsmb.2583
  • Primary Citation of Related Structures:  
    4JN4, 4JNE, 4JNF

  • PubMed Abstract: 
  • The 70-kilodalton (kDa) heat-shock proteins (Hsp70s) are ubiquitous molecular chaperones essential for cellular protein folding and proteostasis. Each Hsp70 has two functional domains: a nucleotide-binding domain (NBD), which binds and hydrolyzes ATP, and a substrate-binding domain (SBD), which binds extended polypeptides ...

    The 70-kilodalton (kDa) heat-shock proteins (Hsp70s) are ubiquitous molecular chaperones essential for cellular protein folding and proteostasis. Each Hsp70 has two functional domains: a nucleotide-binding domain (NBD), which binds and hydrolyzes ATP, and a substrate-binding domain (SBD), which binds extended polypeptides. NBD and SBD interact little when in the presence of ADP; however, ATP binding allosterically couples the polypeptide- and ATP-binding sites. ATP binding promotes polypeptide release; polypeptide rebinding stimulates ATP hydrolysis. This allosteric coupling is poorly understood. Here we present the crystal structure of an intact ATP-bound Hsp70 from Escherichia coli at 1.96-Å resolution. The ATP-bound NBD adopts a unique conformation, forming extensive interfaces with an SBD that has changed radically, having its α-helical lid displaced and the polypeptide-binding channel of its β-subdomain restructured. These conformational changes, together with our biochemical assays, provide a structural explanation for allosteric coupling in Hsp70 activity.


    Organizational Affiliation

    Department of Physiology and Biophysics, Virginia Commonwealth University, Richmond, Virginia, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Chaperone protein DnaKA, B608Escherichia coli K-12Mutation(s): 3 
Gene Names: dnaKgroPgrpFsegb0014JW0013
UniProt
Find proteins for P0A6Y8 (Escherichia coli (strain K12))
Explore P0A6Y8 
Go to UniProtKB:  P0A6Y8
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ATP (Subject of Investigation/LOI)
Query on ATP

Download Ideal Coordinates CCD File 
D [auth A], M [auth B]ADENOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O13 P3
ZKHQWZAMYRWXGA-KQYNXXCUSA-N
 Ligand Interaction
SO4
Query on SO4

Download Ideal Coordinates CCD File 
E [auth A] , F [auth A] , G [auth A] , H [auth A] , I [auth A] , N [auth B] , O [auth B] , P [auth B] , 
E [auth A], F [auth A], G [auth A], H [auth A], I [auth A], N [auth B], O [auth B], P [auth B], Q [auth B], R [auth B], S [auth B]
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GOL
Query on GOL

Download Ideal Coordinates CCD File 
J [auth A], K [auth A], T [auth B], U [auth B]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
C [auth A], L [auth B]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
ATP PDBBind:  4JN4 Kd: 1380 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.197 
  • R-Value Work: 0.162 
  • R-Value Observed: 0.164 
  • Space Group: I 4 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 291.739α = 90
b = 291.739β = 90
c = 99.5γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
PHASERphasing
PHENIXrefinement
XDSdata reduction
SCALAdata scaling

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-05-29
    Type: Initial release
  • Version 1.1: 2013-07-10
    Changes: Database references
  • Version 1.2: 2013-08-07
    Changes: Database references