3F9W

Structural Insights into Lysine Multiple Methylation by SET Domain Methyltransferases, SET8-Y334F / H4-Lys20 / AdoHcy

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.162 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history. 

Literature

Structural origins for the product specificity of SET domain protein methyltransferases.

Couture, J.F., Dirk, L.M., Brunzelle, J.S., Houtz, R.L., Trievel, R.C.

(2008) Proc.Natl.Acad.Sci.Usa 105: 20659-20664

  • DOI: 10.1073/pnas.0806712105
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • SET domain protein lysine methyltransferases (PKMTs) regulate transcription and other cellular functions through site-specific methylation of histones and other substrates. PKMTs catalyze the formation of monomethylated, dimethylated, or trimethylate ...

    SET domain protein lysine methyltransferases (PKMTs) regulate transcription and other cellular functions through site-specific methylation of histones and other substrates. PKMTs catalyze the formation of monomethylated, dimethylated, or trimethylated products, establishing an additional hierarchy with respect to methyllysine recognition in signaling. Biochemical studies of PKMTs have identified a conserved position within their active sites, the Phe/Tyr switch, that governs their respective product specificities. To elucidate the mechanism underlying this switch, we have characterized a Phe/Tyr switch mutant of the histone H4 Lys-20 (H4K20) methyltransferase SET8, which alters its specificity from a monomethyltransferase to a dimethyltransferase. The crystal structures of the SET8 Y334F mutant bound to histone H4 peptides bearing unmodified, monomethyl, and dimethyl Lys-20 reveal that the phenylalanine substitution attenuates hydrogen bonding to a structurally conserved water molecule adjacent to the Phe/Tyr switch, facilitating its dissociation. The additional space generated by the solvent's dissociation enables the monomethyllysyl side chain to adopt a conformation that is catalytically competent for dimethylation and furnishes sufficient volume to accommodate the dimethyl epsilon-ammonium product. Collectively, these results indicate that the Phe/Tyr switch regulates product specificity through altering the affinity of an active-site water molecule whose dissociation is required for lysine multiple methylation.

    Organizational Affiliation: 

    Department of Biological Chemistry, University of Michigan, Ann Arbor, MI 48109, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Histone-lysine N-methyltransferase SETD8
A, B, C, D
166Homo sapiensMutation(s): 1 
Gene Names: KMT5A (PRSET7, SET07, SET8, SETD8)
EC: 2.1.1.-
Find proteins for Q9NQR1 (Homo sapiens)
Go to Gene View: KMT5A
Go to UniProtKB:  Q9NQR1
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Histone H4
E, F, G, H
10Homo sapiensMutation(s): 0 
Gene Names: H4C1, H4C2, H4C3, H4C4, H4C5, H4C6, H4C8, H4C9, H4C11, H4C12, H4C13, H4C14, H4C15, H4-16 (H4/A, H4FA, HIST1H4A, H4/I, H4FI, HIST1H4B, H4/G, H4FG, HIST1H4C, H4/B, H4FB, HIST1H4D, H4/J, H4FJ, HIST1H4E, H4/C, H4FC, HIST1H4F, H4/H, H4FH, HIST1H4H, H4/M, H4FM, HIST1H4I, H4/E, H4FE, HIST1H4J, H4/D, H4FD, HIST1H4K, H4/K, H4FK, HIST1H4L, H4/N, H4F2, H4FN, HIST2H4, HIST2H4A, H4/O, H4FO, HIST2H4B, HIST4H4)
Find proteins for P62805 (Homo sapiens)
Go to UniProtKB:  P62805
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SAH
Query on SAH
Download SDF File 
Download CCD File 
A, B, C, D
S-ADENOSYL-L-HOMOCYSTEINE
C14 H20 N6 O5 S
ZJUKTBDSGOFHSH-WFMPWKQPSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.162 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 44.000α = 89.20
b = 45.600β = 87.10
c = 94.200γ = 90.80
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing
REFMACrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-11-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2018-01-24
    Type: Structure summary