Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 42.39 kDa 
• Atom Count: 3172 
• Residue Count: 380 
• Unique protein chains: 1

1HJO

ATPase domain of human heat shock 70kDa protein 1

• DOI: 10.2210/pdb1HJO/pdb

• Classification: HYDROLASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1998-10-13 Released: 1998-10-21 
• Deposition Author(s): Osipiuk, J., Walsh, M.A., Freeman, B.C., Morimoto, R.I., Joachimiak, A.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.253 
• R-Value Work: 0.203 
• R-Value Observed: 0.203 

Literature

Structure of a new crystal form of human Hsp70 ATPase domain.

Osipiuk, J., Walsh, M.A., Freeman, B.C., Morimoto, R.I., Joachimiak, A.

(1999) Acta Crystallogr D Biol Crystallogr 55: 1105-1107

• PubMed: 10216320 
• DOI: 10.1107/s0907444999002103
• Primary Citation of Related Structures:  
  1HJO


• PubMed Abstract: 
  

Hsp70 proteins are highly conserved proteins induced by heat shock and other stress conditions. An ATP-binding domain of human Hsp70 protein has been crystallized in two major morphological forms at pH 7.0 in the presence of PEG 8000 and CaCl2. Both crystal forms belong to the orthorhombic space group P212121, but show no resemblance in unit-cell parameters. Analysis of the crystal structures for both forms shows a 1-2 A shift of one of the subdomains of the protein. This conformational change could reflect a 'natural' flexibility of the protein which might be relevant to ATP binding and may facilitate the interaction of other proteins with Hsp70 protein.

---

Related Citations: 

• Human Hsp70 Molecular Chaperone Binds Two Calcium Ions within the ATPase Domain
  Sriram, M., Osipiuk, J., Freeman, B.C., Morimoto, R.I., Joachimiak, A.
  (1997) Structure 5: 403

• Three-Dimensional Structure of the ATPase Fragment of a 70K Heat-Shock Cognate Protein
  Flaherty, K.M., Deluca-Flaherty, C., Mckay, D.B.
  (1990) Nature 346: 623

---

Organizational Affiliation: 

Argonne National Laboratory, Center for Mechanistic Biology and Biotechnology, 9700 S. Cass Avenue, Argonne, IL 60439, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN (HEAT-SHOCK 70KD PROTEIN)	A	380	Homo sapiens	Mutation(s): 0  Gene Names: HSPA1A, HSP72, HSPA1, HSX70 EC: 3.6.1.3
Find proteins for P0DMV8 (Homo sapiens) Explore P0DMV8  Go to UniProtKB:  P0DMV8
NIH Common Fund Data Resources
PHAROS  P0DMV8 GTEx  ENSG00000204389

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ADP	A	ADENOSINE-5'-DIPHOSPHATE C10 H15 N5 O10 P2 XTWYTFMLZFPYCI-KQYNXXCUSA-N
CA	A	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N
CL	A	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
ADP	IC50:  280   nM  BindingDB
ADP	Kd:  324   nM  BindingDB
ADP	Kd:  320   nM  BindingDB

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.253 
• R-Value Work: 0.203 
• R-Value Observed: 0.203 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 70.215	α = 90
b = 72.564	β = 90
c = 98.927	γ = 90

Software Package:

Software Name	Purpose
AMoRE	phasing
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1998-10-13 
• Released Date: 1998-10-21 
Deposition Author(s): Osipiuk, J., Walsh, M.A., Freeman, B.C., Morimoto, R.I., Joachimiak, A.

Revision History 

• Version 1.0: 1998-10-21
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2012-05-23
  Changes: Structure summary