6ASY

BiP-ATP2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.159 
  • R-Value Observed: 0.160 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Conformation transitions of the polypeptide-binding pocket support an active substrate release from Hsp70s.

Yang, J.Zong, Y.Su, J.Li, H.Zhu, H.Columbus, L.Zhou, L.Liu, Q.

(2017) Nat Commun 8: 1201-1201

  • DOI: https://doi.org/10.1038/s41467-017-01310-z
  • Primary Citation of Related Structures:  
    6ASY

  • PubMed Abstract: 

    Cellular protein homeostasis depends on heat shock proteins 70 kDa (Hsp70s), a class of ubiquitous and highly conserved molecular chaperone. Key to the chaperone activity is an ATP-induced allosteric regulation of polypeptide substrate binding and release. To illuminate the molecular mechanism of this allosteric coupling, here we present a novel crystal structure of an intact human BiP, an essential Hsp70 in ER, in an ATP-bound state. Strikingly, the polypeptide-binding pocket is completely closed, seemingly excluding any substrate binding. Our FRET, biochemical and EPR analysis suggests that this fully closed conformation is the major conformation for the ATP-bound state in solution, providing evidence for an active release of bound polypeptide substrates following ATP binding. The Hsp40 co-chaperone converts this fully closed conformation to an open conformation to initiate productive substrate binding. Taken together, this study provided a mechanistic understanding of the dynamic nature of the polypeptide-binding pocket in the Hsp70 chaperone cycle.


  • Organizational Affiliation

    Department of Physiology and Biophysics, Virginia Commonwealth University, Richmond, VA, 23298, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
78 kDa glucose-regulated protein
A, B
606Homo sapiensMutation(s): 0 
Gene Names: HSPA5GRP78
UniProt & NIH Common Fund Data Resources
Find proteins for P11021 (Homo sapiens)
Explore P11021 
Go to UniProtKB:  P11021
PHAROS:  P11021
GTEx:  ENSG00000044574 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP11021
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
ATP
Query on ATP

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

Download Ideal Coordinates CCD File 
I [auth A]
J [auth A]
K [auth A]
L [auth A]
W [auth B]
I [auth A],
J [auth A],
K [auth A],
L [auth A],
W [auth B],
X [auth B],
Y [auth B],
Z [auth B]
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
PO4
Query on PO4

Download Ideal Coordinates CCD File 
AA [auth B]
BA [auth B]
CA [auth B]
DA [auth B]
M [auth A]
AA [auth B],
BA [auth B],
CA [auth B],
DA [auth B],
M [auth A],
N [auth A],
O [auth A],
P [auth A],
Q [auth A],
R [auth A]
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
GOL
Query on GOL

Download Ideal Coordinates CCD File 
C [auth A]
D [auth A]
E [auth A]
F [auth A]
G [auth A]
C [auth A],
D [auth A],
E [auth A],
F [auth A],
G [auth A],
S [auth B],
T [auth B],
U [auth B]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.159 
  • R-Value Observed: 0.160 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 75.829α = 62.05
b = 75.752β = 62.23
c = 78.791γ = 73.42
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
SHELXDphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR01GM098592
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR01GM109193
American Heart AssociationUnited States17GRNT33660506
Virginia Commonwealth UniversityUnited StatesBlick Scholar Award

Revision History  (Full details and data files)

  • Version 1.0: 2017-12-06
    Type: Initial release
  • Version 1.1: 2020-01-01
    Changes: Author supporting evidence
  • Version 1.2: 2024-03-13
    Changes: Data collection, Database references