6AY2

Structure of CathB with covalently linked Compound 28

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.176 
  • R-Value Work: 0.161 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history. 

Literature

Discovery of Peptidomimetic Antibody-Drug Conjugate Linkers with Enhanced Protease Specificity.

Wei, B., Gunzner-Toste, J., Yao, H., Wang, T., Wang, J., Xu, Z., Chen, J., Wai, J., Nonomiya, J., Tsai, S.P., Chuh, J., Kozak, K.R., Liu, Y., Yu, S.F., Lau, J., Li, G., Phillips, G.D., Leipold, D., Kamath, A., Su, D., Xu, K., Eigenbrot, C., Steinbacher, S., Ohri, R., Raab, H., Staben, L.R., Zhao, G., Flygare, J.A., Pillow, T.H., Verma, V., Masterson, L.A., Howard, P.W., Safina, B.

(2018) J. Med. Chem. 61: 989-1000

  • DOI: 10.1021/acs.jmedchem.7b01430

  • PubMed Abstract: 

    • Antibody-drug conjugates (ADCs) have become an important therapeutic modality for oncology, with three approved by the FDA and over 60 others in clinical trials. Despite the progress, improvements in ADC therapeutic index are desired. Peptide-based A ...

    Antibody-drug conjugates (ADCs) have become an important therapeutic modality for oncology, with three approved by the FDA and over 60 others in clinical trials. Despite the progress, improvements in ADC therapeutic index are desired. Peptide-based ADC linkers that are cleaved by lysosomal proteases have shown sufficient stability in serum and effective payload-release in targeted cells. If the linker can be preferentially hydrolyzed by tumor-specific proteases, safety margin may improve. However, the use of peptide-based linkers limits our ability to modulate protease specificity. Here we report the structure-guided discovery of novel, nonpeptidic ADC linkers. We show that a cyclobutane-1,1-dicarboxamide-containing linker is hydrolyzed predominantly by cathepsin B while the valine-citrulline dipeptide linker is not. ADCs bearing the nonpeptidic linker are as efficacious and stable in vivo as those with the dipeptide linker. Our results strongly support the application of the peptidomimetic linker and present new opportunities for improving the selectivity of ADCs.

    Organizational Affiliation: 

    Genentech, Inc. , 1 DNA Way, South San Francisco, California 94080, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cathepsin B
A, B
255Homo sapiensMutation(s): 0 
Gene Names: CTSB (CPSB)
EC: 3.4.22.1
Find proteins for P07858 (Homo sapiens)
Go to Gene View: CTSB
Go to UniProtKB:  P07858
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
C1G
Query on C1G
Download SDF File 
Download CCD File 
A, B
N~1~-[(2S)-1-amino-5-(carbamoylamino)pentan-2-yl]-N'~1~-[(1R)-1-(thiophen-3-yl)ethyl]cyclobutane-1,1-dicarboxamide
C18 H29 N5 O3 S
QWGHBARYVOPELP-OCCSQVGLSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.176 
  • R-Value Work: 0.161 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 31.317α = 90.00
b = 127.243β = 102.90
c = 70.034γ = 90.00
Software Package:
Software NamePurpose
XSCALEdata scaling
PDB_EXTRACTdata extraction
XDSdata reduction
REFMACrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots


View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-12-27
    Type: Initial release
  • Version 1.1: 2018-02-21
    Type: Database references