p21 (RAC1) activated kinase 6 | PAKB subfamily | IUPHAR/BPS Guide to PHARMACOLOGY

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p21 (RAC1) activated kinase 6

Target not currently curated in GtoImmuPdb

Target id: 2137

Nomenclature: p21 (RAC1) activated kinase 6

Abbreviated Name: PAK6

Family: PAKB subfamily

Annotation status:  image of an orange circle Annotated and awaiting review. Please contact us if you can help with reviewing.  » Email us

Gene and Protein Information
Species TM AA Chromosomal Location Gene Symbol Gene Name Reference
Human - 681 15q14 PAK6 p21 (RAC1) activated kinase 6
Mouse - 682 2 E5 Pak6 p21 (RAC1) activated kinase 6
Rat - 681 3 q35 Pak6 p21 (RAC1) activated kinase 6
Previous and Unofficial Names
p21 (CDKN1A)-activated kinase 6 | p21-activated kinase 6 | PAK5 | p21 protein (Cdc42/Rac)-activated kinase 6
Database Links
ChEMBL Target
Ensembl Gene
Entrez Gene
Human Protein Atlas
KEGG Enzyme
RefSeq Nucleotide
RefSeq Protein
Selected 3D Structures
Image of receptor 3D structure from RCSB PDB
Description:  The crystal structure of human cdc42 in complex with the CRIB domain of human p21-activated kinase 6 (PAK6)
Resolution:  2.4Å
Species:  Human
Image of receptor 3D structure from RCSB PDB
Description:  Crystal structure of the human P21-activated kinase 6
PDB Id:  2C30
Resolution:  1.6Å
Species:  Human
References:  3
Image of receptor 3D structure from RCSB PDB
Description:  PAK6 kinase domain in complex with PF-3758309.
PDB Id:  4KS7
Ligand:  PF-3758309
Resolution:  1.4Å
Species:  Human
References:  4
Enzyme Reaction
EC Number:

Download all structure-activity data for this target as a CSV file

Key to terms and symbols View all chemical structures Click column headers to sort
Ligand Sp. Action Value Parameter Reference
GSK690693 Hs Inhibition 8.2 pIC50 6
pIC50 8.2 (IC50 6x10-9 M) [6]
Description: Data from binding assays.
compound 4 [PMID: 24432870] Hs Inhibition 6.9 pIC50 7
pIC50 6.9 (IC50 1.26x10-7 M) [7]
PF-3758309 Hs Inhibition 6.7 pIC50 7
pIC50 6.7 (IC50 1.81x10-7 M) [7]
DiscoveRx KINOMEscan® screen
A screen of 72 inhibitors against 456 human kinases. Quantitative data were derived using DiscoveRx KINOMEscan® platform.
Reference: 2,8

Key to terms and symbols Click column headers to sort
Target used in screen: PAK6
Ligand Sp. Type Action Value Parameter
staurosporine Hs Inhibitor Inhibition 9.2 pKd
lestaurtinib Hs Inhibitor Inhibition 8.0 pKd
GSK690693 Hs Inhibitor Inhibition 7.7 pKd
tamatinib Hs Inhibitor Inhibition 6.5 pKd
A-674563 Hs Inhibitor Inhibition 6.1 pKd
PP-242 Hs Inhibitor Inhibition 6.0 pKd
KW-2449 Hs Inhibitor Inhibition 5.9 pKd
sunitinib Hs Inhibitor Inhibition 5.6 pKd
ruxolitinib Hs Inhibitor Inhibition 5.5 pKd
SB203580 Hs Inhibitor Inhibition <5.5 pKd
Displaying the top 10 most potent ligands  View all ligands in screen »
EMD Millipore KinaseProfilerTM screen/Reaction Biology Kinase HotspotSM screen
A screen profiling 158 kinase inhibitors (Calbiochem Protein Kinase Inhibitor Library I and II, catalogue numbers 539744 and 539745) for their inhibitory activity at 1µM and 10µM against 234 human recombinant kinases using the EMD Millipore KinaseProfilerTM service.

A screen profiling the inhibitory activity of 178 commercially available kinase inhibitors at 0.5µM against a panel of 300 recombinant protein kinases using the Reaction Biology Corporation Kinase HotspotSM platform.


Reference: 1,5

Key to terms and symbols Click column headers to sort
Target used in screen: PAK6/PAK6
Ligand Sp. Type Action % Activity remaining at 0.5µM % Activity remaining at 1µM % Activity remaining at 10µM
staurosporine Hs Inhibitor Inhibition 4.7 -1.0 -1.0
Gö 6976 Hs Inhibitor Inhibition 20.4 4.0 2.0
K-252a Hs Inhibitor Inhibition 38.9 0.0 -1.0
aminopurvalanol A Hs Inhibitor Inhibition 57.3 26.0 5.0
Gö 6983 Hs Inhibitor Inhibition 70.4 95.0 95.0
p38 MAP kinase inhibitor Hs Inhibitor Inhibition 73.5 89.0 82.0
GSK-3beta inhibitor II Hs Inhibitor Inhibition 74.0 89.0 73.0
Flt-3 inhibitor II Hs Inhibitor Inhibition 74.4 83.0 52.0
GSK-3 inhibitor X Hs Inhibitor Inhibition 74.8 89.0 67.0
SB203580 Hs Inhibitor Inhibition 76.7 110.0 100.0
Displaying the top 10 most potent ligands  View all ligands in screen »


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1. Anastassiadis T, Deacon SW, Devarajan K, Ma H, Peterson JR. (2011) Comprehensive assay of kinase catalytic activity reveals features of kinase inhibitor selectivity. Nat. Biotechnol., 29 (11): 1039-45. [PMID:22037377]

2. Davis MI, Hunt JP, Herrgard S, Ciceri P, Wodicka LM, Pallares G, Hocker M, Treiber DK, Zarrinkar PP. (2011) Comprehensive analysis of kinase inhibitor selectivity. Nat. Biotechnol., 29 (11): 1046-51. [PMID:22037378]

3. Eswaran J, Lee WH, Debreczeni JE, Filippakopoulos P, Turnbull A, Fedorov O, Deacon SW, Peterson JR, Knapp S. (2007) Crystal Structures of the p21-activated kinases PAK4, PAK5, and PAK6 reveal catalytic domain plasticity of active group II PAKs. Structure, 15 (2): 201-13. [PMID:17292838]

4. Gao J, Ha BH, Lou HJ, Morse EM, Zhang R, Calderwood DA, Turk BE, Boggon TJ. (2013) Substrate and inhibitor specificity of the type II p21-activated kinase, PAK6. PLoS ONE, 8 (10): e77818. [PMID:24204982]

5. Gao Y, Davies SP, Augustin M, Woodward A, Patel UA, Kovelman R, Harvey KJ. (2013) A broad activity screen in support of a chemogenomic map for kinase signalling research and drug discovery. Biochem. J., 451 (2): 313-28. [PMID:23398362]

6. Heerding DA, Rhodes N, Leber JD, Clark TJ, Keenan RM, Lafrance LV, Li M, Safonov IG, Takata DT, Venslavsky JW et al.. (2008) Identification of 4-(2-(4-amino-1,2,5-oxadiazol-3-yl)-1-ethyl-7-{[(3S)-3-piperidinylmethyl]oxy}-1H-imidazo[4,5-c]pyridin-4-yl)-2-methyl-3-butyn-2-ol (GSK690693), a novel inhibitor of AKT kinase. J. Med. Chem., 51 (18): 5663-79. [PMID:18800763]

7. Karpov AS, Amiri P, Bellamacina C, Bellance MH, Breitenstein W, Daniel D, Denay R, Fabbro D, Fernandez C, Galuba I et al.. (2015) Optimization of a Dibenzodiazepine Hit to a Potent and Selective Allosteric PAK1 Inhibitor. ACS Med Chem Lett, 6 (7): 776-81. [PMID:26191365]

8. Wodicka LM, Ciceri P, Davis MI, Hunt JP, Floyd M, Salerno S, Hua XH, Ford JM, Armstrong RC, Zarrinkar PP et al.. (2010) Activation state-dependent binding of small molecule kinase inhibitors: structural insights from biochemistry. Chem. Biol., 17 (11): 1241-9. [PMID:21095574]

How to cite this page

PAKB subfamily: p21 (RAC1) activated kinase 6. Last modified on 03/12/2015. Accessed on 19/11/2019. IUPHAR/BPS Guide to PHARMACOLOGY, http://www.guidetopharmacology.org/GRAC/ObjectDisplayForward?objectId=2137.