9R25 | pdb_00009r25

Sorafenib in complex with p38alpha (MAPK14)

• PDB DOI: https://doi.org/10.2210/pdb9R25/pdb

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


• Deposited: 2025-04-29 Released: 2026-05-06 
• Deposition Author(s): Gomez, S.M., Buehrmann, M., Klein, A., Vasa, S.K., Weisner, J., Vatheuer, H., Czodrowski, P., Rauh, D., Linser, R.
• Funding Organization(s): Other private

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 
  0.210 (Depositor), 0.211 (DCC) 
• R-Value Work: 
  0.181 (Depositor), 0.182 (DCC) 
• R-Value Observed: 
  0.183 (Depositor) 

Starting Model: experimental

Literature

Sorafenib and regorafenib differentially impact the dynamic conformational ensemble of p38alpha

Gomez, S.M., Buehrmann, M., Klein, A., Vasa, S.K., Weisner, J., Vatheuer, H., Czodrowski, P., Rauh, D., Linser, R.

To be published.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: isothermal titration calorimetry

Macromolecule Content 

• Total Structure Weight: 42.1 kDa 
• Atom Count: 2,947 
• Modeled Residue Count: 331 
• Deposited Residue Count: 360 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Mitogen-activated protein kinase 14	A	360	Homo sapiens	Mutation(s): 0  Gene Names: MAPK14, CSBP, CSBP1, CSBP2, CSPB1, MXI2, SAPK2A EC: 2.7.11.24
UniProt & NIH Common Fund Data Resources
Find proteins for Q16539 (Homo sapiens) Explore Q16539  Go to UniProtKB:  Q16539
PHAROS:  Q16539 GTEx:  ENSG00000112062

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
BAX (Subject of Investigation/LOI)	B [auth A]	4-{4-[({[4-CHLORO-3-(TRIFLUOROMETHYL)PHENYL]AMINO}CARBONYL)AMINO]PHENOXY}-N-METHYLPYRIDINE-2-CARBOXAMIDE C21 H16 Cl F3 N4 O3 MLDQJTXFUGDVEO-UHFFFAOYSA-N
BOG	C [auth A]	octyl beta-D-glucopyranoside C14 H28 O6 HEGSGKPQLMEBJL-RKQHYHRCSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free:  0.210 (Depositor), 0.211 (DCC) 
• R-Value Work:  0.181 (Depositor), 0.182 (DCC) 
• R-Value Observed: 0.183 (Depositor) 

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 66.43	α = 90
b = 75.08	β = 90
c = 78.34	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XSCALE	data scaling
PHASER	phasing

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2026-05-06 
Deposition Author(s): Gomez, S.M., Buehrmann, M., Klein, A., Vasa, S.K., Weisner, J., Vatheuer, H., Czodrowski, P., Rauh, D., Linser, R.

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Funding Organization	Location	Grant Number
Other private		--

Revision History  

• Version 1.0: 2026-05-06
  Type: Initial release