Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Standalone Viewers  
Protein Workshop | Ligand Explorer

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - AB 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 137082.59 
• Atom Count: 9368 
• Residue Count: 1222 
• Unique protein chains: 2

3C7N

Structure of the Hsp110:Hsc70 Nucleotide Exchange Complex

• DOI: 10.2210/pdb3C7N/pdb

• Classification: CHAPERONE/CHAPERONE
• Organism(s): Saccharomyces cerevisiae (strain ATCC 204508 / S288c), Bos taurus
• Expression System: Escherichia coli BL21(DE3)


• Deposited: 2008-02-07 Released: 2008-05-27 
• Deposition Author(s): Schuermann, J.P., Jiang, J., Hart, P.J., Sousa, R.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.115 Å
• R-Value Free: 0.283 
• R-Value Work: 0.224 

Literature

Structure of the Hsp110:Hsc70 nucleotide exchange machine

Schuermann, J.P., Jiang, J., Cuellar, J., Llorca, O., Wang, L., Gimenez, L.E., Jin, S., Taylor, A.B., Demeler, B., Morano, K.A., Hart, P.J., Valpuesta, J.M., Lafer, E.M., Sousa, R.

(2008) Mol.Cell 31: 232-243

• PubMed: 18550409 
• DOI: 10.1016/j.molcel.2008.05.006


• PubMed Abstract: 
  

Hsp70s mediate protein folding, translocation, and macromolecular complex remodeling reactions. Their activities are regulated by proteins that exchange ADP for ATP from the nucleotide-binding domain (NBD) of the Hsp70. These nucleotide exchange factors (NEFs) include the Hsp110s, which are themselves members of the Hsp70 family. We report the structure of an Hsp110:Hsc70 nucleotide exchange complex. The complex is characterized by extensive protein:protein interactions and symmetric bridging interactions between the nucleotides bound in each partner protein's NBD. An electropositive pore allows nucleotides to enter and exit the complex. The role of nucleotides in complex formation and dissociation, and the effects of the protein:protein interactions on nucleotide exchange, can be understood in terms of the coupled effects of the nucleotides and protein:protein interactions on the open-closed isomerization of the NBDs. The symmetrical interactions in the complex may model other Hsp70 family heterodimers in which two Hsp70s reciprocally act as NEFs.

---

Organizational Affiliation: 

Department of Biochemistry, University of Texas Health Science Center, San Antonio, TX 78229-3900, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Heat shock protein homolog SSE1	A	668	Saccharomyces cerevisiae (strain ATCC 204508 / S288c)	Mutation(s): 0  Gene Names: SSE1 (MSI3)
Find proteins for P32589 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c)) Go to UniProtKB:  P32589

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
Heat shock cognate	B	554	Bos taurus	Mutation(s): 0  Gene Names: HSPA8 (HSC70)
Find proteins for P19120 (Bos taurus) Go to Gene View: HSPA8 Go to UniProtKB:  P19120

Small Molecules

Ligands 5 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
SO4	A, B	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
ADP	A, B	ADENOSINE-5'-DIPHOSPHATE C10 H15 N5 O10 P2 XTWYTFMLZFPYCI-KQYNXXCUSA-N
CL	B	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M
MG	A, B	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N
BEF	A	BERYLLIUM TRIFLUORIDE ION Be F3 OGIAHMCCNXDTIE-UHFFFAOYSA-K

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
ADP	IC50: 280 nM (100) BINDINGDB
ADP	Kd: 320 - 324 nM (100) BINDINGDB
ADP	Kd: 200 nM PDBBIND

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.115 Å
• R-Value Free: 0.283 
• R-Value Work: 0.224 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length (Å)	Angle (°)
a = 123.533	α = 90.00
b = 169.501	β = 90.00
c = 87.724	γ = 90.00

Software Package:

Software Name	Purpose
PDB_EXTRACT	data extraction
HKL-2000	data reduction
PHENIX	refinement
HKL-2000	data collection
HKL-2000	data scaling
DENZO	data reduction
MOLREP	phasing
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2008-02-07 
• Released Date: 2008-05-27 
• Deposition Author(s): Schuermann, J.P., Jiang, J., Hart, P.J., Sousa, R.

Revision History 

• Version 1.0: 2008-05-27
  Type: Initial release
• Version 1.1: 2011-07-13
  Type: Version format compliance
• Version 1.2: 2017-10-25
  Type: Refinement description, Source and taxonomy