5FA5

Crystal Structure of PRMT5:MEP50 in complex with MTA and H4 peptide

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.34 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.179 

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Literature

Disordered methionine metabolism in MTAP/CDKN2A-deleted cancers leads to dependence on PRMT5.

Mavrakis, K.J., McDonald, E.R., Schlabach, M.R., Billy, E., Hoffman, G.R., deWeck, A., Ruddy, D.A., Venkatesan, K., Yu, J., McAllister, G., Stump, M., deBeaumont, R., Ho, S., Yue, Y., Liu, Y., Yan-Neale, Y., Yang, G., Lin, F., Yin, H., Gao, H., Kipp, D.R., Zhao, S., McNamara, J.T., Sprague, E.R., Zheng, B., Lin, Y., Cho, Y.S., Gu, J., Crawford, K., Ciccone, D., Vitari, A.C., Lai, A., Capka, V., Hurov, K., Porter, J.A., Tallarico, J., Mickanin, C., Lees, E., Pagliarini, R., Keen, N., Schmelzle, T., Hofmann, F., Stegmeier, F., Sellers, W.R.

(2016) Science 351: 1208-1213

  • DOI: 10.1126/science.aad5944
  • Primary Citation of Related Structures:  
    5FA5

  • PubMed Abstract: 

    • 5-Methylthioadenosine phosphorylase (MTAP) is a key enzyme in the methionine salvage pathway. The MTAP gene is frequently deleted in human cancers because of its chromosomal proximity to the tumor suppressor gene CDKN2A. By interrogating data from a large-scale short hairpin RNA-mediated screen across 390 cancer cell line models, we found that the viability of MTAP-deficient cancer cells is impaired by depletion of the protein arginine methyltransferase PRMT5 ...

    5-Methylthioadenosine phosphorylase (MTAP) is a key enzyme in the methionine salvage pathway. The MTAP gene is frequently deleted in human cancers because of its chromosomal proximity to the tumor suppressor gene CDKN2A. By interrogating data from a large-scale short hairpin RNA-mediated screen across 390 cancer cell line models, we found that the viability of MTAP-deficient cancer cells is impaired by depletion of the protein arginine methyltransferase PRMT5. MTAP-deleted cells accumulate the metabolite methylthioadenosine (MTA), which we found to inhibit PRMT5 methyltransferase activity. Deletion of MTAP in MTAP-proficient cells rendered them sensitive to PRMT5 depletion. Conversely, reconstitution of MTAP in an MTAP-deficient cell line rescued PRMT5 dependence. Thus, MTA accumulation in MTAP-deleted cancers creates a hypomorphic PRMT5 state that is selectively sensitized toward further PRMT5 inhibition. Inhibitors of PRMT5 that leverage this dysregulated metabolic state merit further investigation as a potential therapy for MTAP/CDKN2A-deleted tumors.

    Organizational Affiliation: 

    Novartis Institutes for Biomedical Research, Cambridge, MA 02139, USA. william.sellers@novartis.com fstegmeier@ksqtx.com.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Protein arginine N-methyltransferase 5A650Homo sapiensMutation(s): 0 
Gene Names: PRMT5, HRMT1L5, IBP72, JBP1, SKB1
EC: 2.1.1 (PDB Primary Data), 2.1.1.125 (PDB Primary Data), 2.1.1.320 (UniProt)
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Find proteins for O14744 (Homo sapiens)
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PHAROS:  O14744
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UniProt GroupO14744
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Methylosome protein 50B367Homo sapiensMutation(s): 0 
Gene Names: WDR77, MEP50, WD45, HKMT1069, Nbla10071
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Find proteins for Q9BQA1 (Homo sapiens)
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PHAROS:  Q9BQA1
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UniProt GroupQ9BQA1
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Histone H4C20Homo sapiensMutation(s): 0 
Gene Names: 
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Find proteins for P62805 (Homo sapiens)
Explore P62805 
Go to UniProtKB:  P62805
PHAROS:  P62805
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UniProt GroupP62805
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MTA
Query on MTA
Download Ideal Coordinates CCD File 
D [auth A]5'-DEOXY-5'-METHYLTHIOADENOSINE
C11 H15 N5 O3 S
WUUGFSXJNOTRMR-IOSLPCCCSA-N		 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
MTA Binding MOAD:  5FA5 IC50: 4600 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.34 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.179 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 102.05α = 90
b = 137.85β = 90
c = 178.43γ = 90
Software Package:
Software NamePurpose
BUSTER-TNTrefinement
Aimlessdata scaling
PHASERphasing
PDB_EXTRACTdata extraction
XDSdata reduction

Structure Validation

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Ligand Structure Quality Assessment 


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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-02-24
    Type: Initial release
  • Version 1.1: 2016-03-09
    Changes: Database references
  • Version 1.2: 2016-03-23
    Changes: Database references