9QID | pdb_00009qid

Human Mortalin (mitochondrial Hsp70) in complex with wild-type GrpE1

• PDB DOI: https://doi.org/10.2210/pdb9QID/pdb
• EM Map EMD-53186: EMDB EMDataResource

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


• Deposited: 2025-03-17 Released: 2026-06-10 
• Deposition Author(s): Bauer, J.A., Pinkas, M.
• Funding Organization(s): Other government, Ministry of Education (MoE, Czech Republic), European Regional Development Fund

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 2.73 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Human Mortalin (mitochondrial Hsp70) in complex with wild-type GrpE1

Havalova, H., Ondrovicova, G., Pinkas, M., Bauer, J.A., Kutejova, E., Pevala, V.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A2B1 Local Symmetry: Cyclic - C2  (Explore in 3D)
Local Stoichiometry: Homo 2-mer - A2 

Local Symmetry: Cyclic - C2  (Explore in 3D)
Local Stoichiometry: Homo 2-mer - A2 

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

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 118.07 kDa 
• Atom Count: 7,211 
• Modeled Residue Count: 927 
• Deposited Residue Count: 1,064 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Stress-70 protein, mitochondrial	A	646	Homo sapiens	Mutation(s): 0  Gene Names: HSPA9, GRP75, HSPA9B, mt-HSP70 EC: 3.6.4.10
UniProt & NIH Common Fund Data Resources
Find proteins for P38646 (Homo sapiens) Explore P38646  Go to UniProtKB:  P38646
PHAROS:  P38646 GTEx:  ENSG00000113013

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
GrpE protein homolog 1, mitochondrial	B, C	209	Homo sapiens	Mutation(s): 0  Gene Names: GRPEL1, GREPEL1
UniProt & NIH Common Fund Data Resources
Find proteins for Q9HAV7 (Homo sapiens) Explore Q9HAV7  Go to UniProtKB:  Q9HAV7
PHAROS:  Q9HAV7 GTEx:  ENSG00000109519

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ATP (Subject of Investigation/LOI)	D [auth A]	ADENOSINE-5'-TRIPHOSPHATE C10 H16 N5 O13 P3 ZKHQWZAMYRWXGA-KQYNXXCUSA-N
MG (Subject of Investigation/LOI)	E [auth A]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 2.73 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX	1.21rc1_5127
RECONSTRUCTION	cryoSPARC

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2026-06-10 
Deposition Author(s): Bauer, J.A., Pinkas, M.

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Funding Organization	Location	Grant Number
Other government	Slovakia	VEGA-2/0069/23
Other government	Slovakia	APVV-19-0298
Other government	Slovakia	APVV-23-0407
Other government	Slovakia	VEGA-2/0081/24
Ministry of Education (MoE, Czech Republic)	Czech Republic	LM2023042
European Regional Development Fund	European Union	CZ.02.01.01/00/23_015/0008175

Revision History  

• Version 1.0: 2026-06-10
  Type: Initial release