4OC6 | pdb_00004oc6

Structure of Cathepsin D with inhibitor 2-bromo-N-[(2S,3S)-4-{[2-(2,4-dichlorophenyl)ethyl][3-(1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)propanoyl]amino}-3-hydroxy-1-(3-phenoxyphenyl)butan-2-yl]-4,5-dimethoxybenzamide

PDB DOI: https://doi.org/10.2210/pdb4OC6/pdb

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

Deposited: 2014-01-08 Released: 2014-08-13
Deposition Author(s): Graedler, U., Czodrowski, P., Tsaklakidis, C., Klein, M., Maskos, K., Leuthner, B.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.64 Å
R-Value Free:
0.282 (Depositor), 0.288 (DCC)
R-Value Work:
0.207 (Depositor), 0.206 (DCC)
R-Value Observed:
0.211 (Depositor)

wwPDB Validation 3D Report Full Report

Ligand Structure Quality Assessment

This is version 2.1 of the entry. See complete history.

Literature

Structure-based optimization of non-peptidic Cathepsin D inhibitors.

Gradler, U., Czodrowski, P., Tsaklakidis, C., Klein, M., Werkmann, D., Lindemann, S., Maskos, K., Leuthner, B.

(2014) Bioorg Med Chem Lett 24: 4141-4150

PubMed: 25086681 Search on PubMed
DOI: https://doi.org/10.1016/j.bmcl.2014.07.054
Primary Citation Related Structures:
4OBZ, 4OC6, 4OD9

PubMed Abstract:
We discovered a novel series of non-peptidic acylguanidine inhibitors of Cathepsin D as target for osteoarthritis. The initial HTS-hits were optimized by structure-based design using CatD X-ray structures resulting in single digit nanomolar potency in the biochemical CatD assay. However, the most potent analogues showed only micromolar activities in an ex vivo glycosaminoglycan (GAG) release assay in bovine cartilage together with low cellular permeability and suboptimal microsomal stability. This new scaffold can serve as a starting point for further optimization towards in vivo efficacy.

Organizational Affiliation

Merck KGaA, Merck Serono Research, Small Molecule Platform, Frankfurter Str. 250, 64293 Darmstadt, Germany. Electronic address: ulrich.graedler@merckgroup.com.

Macromolecule Content

Total Structure Weight: 39.77 kDa
Atom Count: 2,758
Modeled Residue Count: 341
Deposited Residue Count: 346
Unique protein chains: 2

Macromolecules

Find similar proteins by:

| 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Cathepsin D light chain	A	103	Homo sapiens	Mutation(s): 0 Gene Names: CTSD, CPSD EC: 3.4.23.5
UniProt & NIH Common Fund Data Resources
Find proteins for P07339 (Homo sapiens) Explore P07339 Go to UniProtKB: P07339
PHAROS: P07339 GTEx: ENSG00000117984
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P07339
Glycosylation
Glycosylation Sites: 1	Glycosylation Focus chain A	Go to GlyGen: P07339-1
Sequence Annotations Expand
Reference Sequence

Find similar proteins by:

| 3D Structure

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Cathepsin D heavy chain	B	243	Homo sapiens	Mutation(s): 0 Gene Names: CTSD, CPSD EC: 3.4.23.5
UniProt & NIH Common Fund Data Resources
Find proteins for P07339 (Homo sapiens) Explore P07339 Go to UniProtKB: P07339
PHAROS: P07339 GTEx: ENSG00000117984
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P07339
Glycosylation
Glycosylation Sites: 1	Glycosylation Focus chain B	Go to GlyGen: P07339-1
Sequence Annotations Expand
Reference Sequence

Oligosaccharides

Help

Entity ID: 3
Molecule	Chains	Length	2D Diagram	Glycosylation	D Interactions
alpha-D-mannopyranose-(1-6)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	C	4		N-Glycosylation	Interactions Focus chain C Interactions & Density Focus chain C
Glycosylation Resources
GlyTouCan: G22573RC GlyCosmos: G22573RC GlyGen: G22573RC

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
2S1 Query on 2S1 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]	2-bromo-N-[(2S,3S)-4-{[2-(2,4-dichlorophenyl)ethyl][3-(1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)propanoyl]amino}-3-hydroxy-1-(3-phenoxyphenyl)butan-2-yl]-4,5-dimethoxybenzamide C₄₄ H₄₀ Br Cl₂ N₃ O₈ DQHKQRXAVNDAFY-UWXQCODUSA-N		Interactions Focus chain E [auth B] Interactions & Density Focus chain E [auth B]
NAG Query on NAG Download:Ideal Coordinates CCD File SDF format, chain D [auth B] MOL2 format, chain D [auth B] mmCIF format, chain D [auth B]	D [auth B]	2-acetamido-2-deoxy-beta-D-glucopyranose C₈ H₁₅ N O₆ OVRNDRQMDRJTHS-FMDGEEDCSA-N		Interactions Focus chain D [auth B] Interactions & Density Focus chain D [auth B]
GOL Query on GOL Download:Ideal Coordinates CCD File SDF format, chain F [auth B] MOL2 format, chain F [auth B] mmCIF format, chain F [auth B]	F [auth B]	GLYCEROL C₃ H₈ O₃ PEDCQBHIVMGVHV-UHFFFAOYSA-N		Interactions Focus chain F [auth B] Interactions & Density Focus chain F [auth B]

Binding Affinity Annotations
ID	Source	Binding Affinity
2S1	BindingDB: 4OC6	Ki: 0.7 (nM) from 1 assay(s)
2S1	BindingDB: 4OC6	IC50: min: 0.7, max: 85 (nM) from 2 assay(s)

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 2.64 Å
R-Value Free: 0.282 (Depositor), 0.288 (DCC)
R-Value Work: 0.207 (Depositor), 0.206 (DCC)
R-Value Observed: 0.211 (Depositor)

Space Group: P 6₁ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 77.022	α = 90
b = 77.022	β = 90
c = 251.586	γ = 120

Software Package:

Software Name	Purpose
BUSTER	refinement
XDS	data reduction
XSCALE	data scaling

Structure Validation

View Full Validation Report

Ligand Structure Quality Assessment

View more in-depth experimental data

Entry History

Deposition Data

Released Date: 2014-08-13

Deposition Author(s):

Revision History (Full details and data files)

Version 1.0: 2014-08-13
Type: Initial release
Version 1.1: 2014-09-10
Changes: Database references
Version 2.0: 2020-07-29
Type: Remediation
Reason: Carbohydrate remediation
Changes: Atomic model, Data collection, Derived calculations, Structure summary
Version 2.1: 2024-11-27
Changes: Data collection, Database references, Structure summary