6G38

Crystal structure of haspin in complex with tubercidin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.47 Å
  • R-Value Free: 0.165 
  • R-Value Work: 0.143 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Halogen-Aromatic pi Interactions Modulate Inhibitor Residence Times.

Heroven, C.Georgi, V.Ganotra, G.K.Brennan, P.Wolfreys, F.Wade, R.C.Fernandez-Montalvan, A.E.Chaikuad, A.Knapp, S.

(2018) Angew. Chem. Int. Ed. Engl. 57: 7220-7224

  • DOI: 10.1002/anie.201801666
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Prolonged drug residence times may result in longer lasting drug efficacy, improved pharmacodynamic properties and "kinetic selectivity" over off-targets with fast drug dissociation rates. However, few strategies have been elaborated to rationally mo ...

    Prolonged drug residence times may result in longer lasting drug efficacy, improved pharmacodynamic properties and "kinetic selectivity" over off-targets with fast drug dissociation rates. However, few strategies have been elaborated to rationally modulate drug residence time and thereby to integrate this key property into the drug development process. Here, we show that the interaction between a halogen moiety on an inhibitor and an aromatic residue in the target protein can significantly increase inhibitor residence time. By using the interaction of the serine/threonine kinase haspin with 5-iodotubercidin (5-iTU) derivatives as a model for an archetypal active state (type I) kinase-inhibitor binding mode, we demonstrate that inhibitor residence times markedly increase with the size and polarizability of the halogen atom. This key interaction is dependent on the interactions with an aromatic residue in the gatekeeper position and we observe this interaction in other kinases with an aromatic gatekeeper residue. We provide a detailed mechanistic characterization of the halogen-aromatic π interactions in the haspin-inhibitor complexes by means of kinetic, thermodynamic, and structural measurements along with binding energy calculations. Since halogens are frequently used in drugs and aromatic residues are often present in the binding sites of proteins, our results provide a compelling rationale for introducing aromatic-halogen interactions to prolong drug-target residence times.


    Organizational Affiliation

    University of Oxford, UNITED KINGDOM.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Serine/threonine-protein kinase haspin
A
357Homo sapiensMutation(s): 0 
Gene Names: HASPIN (GSG2)
EC: 2.7.11.1
Find proteins for Q8TF76 (Homo sapiens)
Go to Gene View: HASPIN
Go to UniProtKB:  Q8TF76
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EPE
Query on EPE

Download SDF File 
Download CCD File 
A
4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID
HEPES
C8 H18 N2 O4 S
JKMHFZQWWAIEOD-UHFFFAOYSA-N
 Ligand Interaction
PO4
Query on PO4

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Download CCD File 
A
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
TBN
Query on TBN

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Download CCD File 
A
'2-(4-AMINO-PYRROLO[2,3-D]PYRIMIDIN-7-YL)-5-HYDROXYMETHYL-TETRAHYDRO-FURAN-3,4-DIOL
7-DEAZAADENOSINE
C11 H14 N4 O4
HDZZVAMISRMYHH-KCGFPETGSA-N
 Ligand Interaction
DMS
Query on DMS

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Download CCD File 
A
DIMETHYL SULFOXIDE
C2 H6 O S
IAZDPXIOMUYVGZ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.47 Å
  • R-Value Free: 0.165 
  • R-Value Work: 0.143 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 78.560α = 90.00
b = 78.760β = 90.00
c = 80.020γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
REFMACrefinement
iMOSFLMdata reduction
Aimlessdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-04-18
    Type: Initial release
  • Version 1.1: 2018-05-16
    Type: Data collection, Database references
  • Version 1.2: 2018-06-13
    Type: Data collection, Database references