36HB | pdb_000036hb

Crystal Structure of De Novo Protein Inhibitor of eEF2K

• PDB DOI: https://doi.org/10.2210/pdb36HB/pdb

• Classification: DE NOVO PROTEIN
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2026-06-09 Released: 2026-06-24 
• Deposition Author(s): Klupt, K.A., Belrose, E.G., Jia, Z.
• Funding Organization(s): Natural Sciences and Engineering Research Council (NSERC, Canada)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.49 Å
• R-Value Free: 
  0.276 (Depositor), 0.276 (DCC) 
• R-Value Work: 
  0.199 (Depositor), 0.199 (DCC) 

Starting Model: in silico

Literature

Crystal Structure of De Novo Protein Inhibitor of eEF2K

Klupt, K.A., Belrose, E.G., Jia, Z.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 6-mer - A3B1C1D1 

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 43.65 kDa 
• Atom Count: 3,052 
• Modeled Residue Count: 362 
• Deposited Residue Count: 362 
• Unique protein chains: 4

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CAM1	A [auth C], B [auth A], C [auth B]	106	Escherichia coli	Mutation(s): 0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Peptide	D	30	Escherichia coli	Mutation(s): 0

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
UNK-MET-LEU-VAL-ILE-ILE-LYS-LEU	E	8	Escherichia coli	Mutation(s): 0

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
UNK-ASN-GLU-GLU-GLU-ILE	F [auth G]	6	Escherichia coli	Mutation(s): 0

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SIN	H [auth A], J [auth D]	SUCCINIC ACID C4 H6 O4 KDYFGRWQOYBRFD-UHFFFAOYSA-N
NA	G [auth C], I [auth A]	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.49 Å
• R-Value Free:  0.276 (Depositor), 0.276 (DCC) 
• R-Value Work:  0.199 (Depositor), 0.199 (DCC) 

Space Group: P 6₅ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 86.97	α = 90
b = 86.97	β = 90
c = 221.58	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
XDS	data reduction
XDS	data scaling
PHASER	phasing

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2026-06-24 
Deposition Author(s): Klupt, K.A., Belrose, E.G., Jia, Z.

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Funding Organization	Location	Grant Number
Natural Sciences and Engineering Research Council (NSERC, Canada)	Canada	RGPIN-2018-04427

Revision History  

• Version 1.0: 2026-06-24
  Type: Initial release