Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 42.56 kDa 
• Atom Count: 3,020 
• Modelled Residue Count: 350 
• Deposited Residue Count: 368 
• Unique protein chains: 1

 1TVO

The structure of ERK2 in complex with a small molecule inhibitor

• PDB DOI:  https://doi.org/10.2210/pdb1TVO/pdb

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


• Deposited: 2004-06-30 Released: 2005-09-13 
• Deposition Author(s): Kinoshita, T.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free: 0.272 
• R-Value Work: 0.263 
• R-Value Observed: 0.265 

Literature

Identification of a selective ERK inhibitor and structural determination of the inhibitor-ERK2 complex

Ohori, M., Kinoshita, T., Okubo, M., Sato, K., Yamazaki, A., Arakawa, H., Nishimura, S., Inamura, N., Nakajima, H., Neya, M., Miyake, H., Fujii, T.

(2005) Biochem Biophys Res Commun 336: 357-363

• PubMed: 16139248 
• DOI: https://doi.org/10.1016/j.bbrc.2005.08.082
• Primary Citation of Related Structures:  
  1TVO


• PubMed Abstract: 
  

Selective inhibition of extracellular signal-regulated kinase (ERK) represents a potential approach for the treatment of cancer and other diseases; however, no selective inhibitors are currently available. Here, we describe an ERK-selective inhibitor, FR180204, and determine the structural basis of its selectivity. FR180204 inhibited the kinase activity of ERK1 and ERK2, with K(i) values 0.31 and 0.14microM, respectively. Lineweaver-Burk analysis of the binding interaction revealed that FR180204 acted as competitive inhibitor of ATP. In mink lung epithelial Mv1Lu cells, FR180204 inhibited TGFbeta-induced luciferase-expression. X-ray crystal structure analysis of the human ERK2/FR180204 complex revealed that Q105, D106, L156, and C166, which form the ATP-binding pocket on ERK, play important roles in the drug/protein interaction. These results suggest that FR180204 is an ERK-selective and cell-permeable inhibitor, and could be useful for elucidating the roles of ERK as well as for drug development.

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Organizational Affiliation: 

Lead Discovery Research Laboratories, Astellas Pharma Inc., Miyukigaoka 21, Tsukuba, Ibaraki 305-8585, Japan. [e-mail]

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Mitogen-activated protein kinase 1	A	368	Homo sapiens	Mutation(s): 0  Gene Names: MAPK1, ERK2, PRKM1, PRKM2 EC: 2.7.1.37 (PDB Primary Data), 2.7.11.24 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for P28482 (Homo sapiens) Explore P28482  Go to UniProtKB:  P28482
PHAROS:  P28482

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
FRZ	B [auth A]	5-(2-PHENYLPYRAZOLO[1,5-A]PYRIDIN-3-YL)-1H-PYRAZOLO[3,4-C]PYRIDAZIN-3-AMINE C18 H13 N7 XVECMUKVOMUNLE-UHFFFAOYSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
FRZ	Binding MOAD:  1TVO	Ki: 140 (nM) from 1 assay(s)
	BindingDB:  1TVO	Ki: min: 310, max: 310 (nM) from 2 assay(s)
		Kd: 850 (nM) from 1 assay(s)
		IC50: min: 1200, max: 1900 (nM) from 2 assay(s)
	PDBBind:  1TVO	Ki: 140 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free: 0.272 
• R-Value Work: 0.263 
• R-Value Observed: 0.265 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 48.86	α = 90
b = 69.99	β = 116.5
c = 63.3	γ = 90

Software Package:

Software Name	Purpose
CNX	refinement
CrystalClear	data scaling
AMoRE	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2005-09-13 
Deposition Author(s): Kinoshita, T.

Revision History  

• Version 1.0: 2005-09-13
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2017-10-11
  Changes: Refinement description