4DFF

The SAR development of dihydroimidazoisoquinoline derivatives as phosphodiesterase 10A inhibitors for the treatment of schizophrenia

PDB DOI: https://doi.org/10.2210/pdb4DFF/pdb

Classification: HYDROLASE/HYDROLASE INHIBITOR
Organism(s): Homo sapiens
Expression System: Spodoptera frugiperda
Mutation(s): No

Deposited: 2012-01-23 Released: 2012-03-14
Deposition Author(s): Ho, G.D., Seganish, W.M., Bercovici, A., Tulshian, D., Greenlee, W.J., Van Rijn, R., Hruza, A., Xiao, L., Rindgen, D., Mullins, D., Guzzi, M., Zhang, X., Bleichardt, C., Hodgson, R.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.11 Å
R-Value Free: 0.223
R-Value Work: 0.190
R-Value Observed: 0.192

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Ligand Structure Quality Assessment

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

Literature

The SAR development of dihydroimidazoisoquinoline derivatives as phosphodiesterase 10A inhibitors for the treatment of schizophrenia.

Ho, G.D., Michael Seganish, W., Bercovici, A., Tulshian, D., Greenlee, W.J., Van Rijn, R., Hruza, A., Xiao, L., Rindgen, D., Mullins, D., Guzzi, M., Zhang, X., Bleickardt, C., Hodgson, R.

(2012) Bioorg Med Chem Lett 22: 2585-2589

PubMed: 22377514 Search on PubMed
DOI: https://doi.org/10.1016/j.bmcl.2012.01.113
Primary Citation of Related Structures:
4DFF

PubMed Abstract:
The identification of potent and orally active dihydroimidazoisoquinolines as PDE 10A inhibitors is reported. The SAR development led to the discovery of compound 35 as a potent, selective, and orally active PDE10A inhibitor. Compound 35 inhibited MK-801-induced hyperactivity at 3mg/kg and displayed a 10-fold separation between the minimal effective doses for inhibition of MK-801-induced hyperactivity and hypolocomotion in rats.

Organizational Affiliation

Department of Medicinal Chemistry, Merck Research Laboratories, Kenilworth, NJ 07033, United States. ginny.ho@merck.com

Macromolecule Content

Total Structure Weight: 81.49 kDa
Atom Count: 4,815
Modelled Residue Count: 584
Deposited Residue Count: 704
Unique protein chains: 1

Macromolecules

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(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
cAMP and cAMP-inhibited cGMP 3',5'-cyclic phosphodiesterase 10A	A, B	352	Homo sapiens	Mutation(s): 0 Gene Names: PDE10A EC: 3.1.4.17 (PDB Primary Data), 3.1.4.35 (PDB Primary Data)
UniProt & NIH Common Fund Data Resources
Find proteins for Q9Y233 (Homo sapiens) Explore Q9Y233 Go to UniProtKB: Q9Y233
PHAROS: Q9Y233 GTEx: ENSG00000112541
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	Q9Y233
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
0JP Query on 0JP Download Ideal Coordinates CCD File SDF format, chain E [auth B] MOL2 format, chain E [auth B] mmCIF format, chain E [auth B]	E [auth B]	8,9-dimethoxy-1-(1,3-thiazol-5-yl)-5,6-dihydroimidazo[5,1-a]isoquinoline C₁₆ H₁₅ N₃ O₂ S GFIAXSKRRKHJBD-UHFFFAOYSA-N		Interactions Focus chain E [auth B] Interactions & Density Focus chain E [auth B]
ZN Query on ZN Download Ideal Coordinates CCD File SDF format, chain D [auth A] SDF format, chain G [auth B] MOL2 format, chain D [auth A] MOL2 format, chain G [auth B] mmCIF format, chain D [auth A] mmCIF format, chain G [auth B]	D [auth A], G [auth B]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N		Interactions Focus chain D [auth A] Focus chain G [auth B] Interactions & Density Focus chain D [auth A] Focus chain G [auth B]
MG Query on MG Download Ideal Coordinates CCD File SDF format, chain C [auth A] SDF format, chain F [auth B] MOL2 format, chain C [auth A] MOL2 format, chain F [auth B] mmCIF format, chain C [auth A] mmCIF format, chain F [auth B]	C [auth A], F [auth B]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N		Interactions Focus chain C [auth A] Focus chain F [auth B] Interactions & Density Focus chain C [auth A] Focus chain F [auth B]

Binding Affinity Annotations
ID	Source	Binding Affinity
0JP	PDBBind: 4DFF	Ki: 35 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 2.11 Å
R-Value Free: 0.223
R-Value Work: 0.190
R-Value Observed: 0.192
Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 48.654	α = 90
b = 81.177	β = 90
c = 153.323	γ = 90

Software Package:

Software Name	Purpose
BUSTER	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

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Ligand Structure Quality Assessment

Entry History

Deposition Data

Released Date: 2012-03-14

Deposition Author(s):

Revision History (Full details and data files)

Version 1.0: 2012-03-14
Type: Initial release
Version 1.1: 2012-04-04
Changes: Database references
Version 1.2: 2024-10-30
Changes: Data collection, Database references, Derived calculations, Structure summary