8ZNZ

CD73 bound with HB0045


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.06 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

An antibody cocktail targeting two different CD73 epitopes enhances enzyme inhibition and tumor control.

Xu, J.G.Chen, S.He, Y.Zhu, X.Wang, Y.Ye, Z.Zhou, J.C.Wu, X.Zhang, L.Ren, X.Jia, H.Yu, H.Wei, X.Feng, Y.Chen, X.Cui, X.Pan, X.Wang, S.Xia, S.Shang, H.Pu, Y.Xu, W.Li, H.Chen, Q.Chen, Z.Wang, M.Yan, X.Shi, H.Li, M.Xia, Y.Bellelli, R.Dong, S.He, J.Huang, J.Cai, C.L.Zhu, X.Zhan, Y.Wan, L.

(2024) Nat Commun 15: 10872-10872

  • DOI: https://doi.org/10.1038/s41467-024-55207-9
  • Primary Citation of Related Structures:  
    8ZNZ

  • PubMed Abstract: 

    CD73, an ectoenzyme responsible for adenosine production, is often elevated in immuno-suppressive tumor environments. Inhibition of CD73 activity holds great promise as a therapeutic strategy for CD73-expressing cancers. In this study, we have developed a therapeutic anti-human CD73 antibody cocktail, HB0045. HB0045 is a 1:1 mixture of two humanized monoclonal IgG1 antibodies (mAbs), HB0038 and HB0039. The cocktail not only harnesses the advantages of its parental mAbs in enzyme inhibition but also shows a significantly greater capability of promoting T cell proliferation in vitro. Structural analyses show that HB0045 effectively locks the CD73 dimer in a "partially open" non-active conformation through a double lock mechanism. In various animal models of syngeneic and xenograft tumors, HB0045 inhibits tumor growth more potently than the single mAbs. Collectively, our findings provide functional and structural insights into the mechanism of a CD73-targeting antibody cocktail.


  • Organizational Affiliation

    Key Laboratory of Immune Response and Immunotherapy, Guangzhou Institutes of Biomedicine and Health (GIBH), Chinese Academy of Scienes, Guangzhou, China.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
5'-nucleotidaseA,
F [auth B]
524Homo sapiensMutation(s): 0 
Gene Names: NT5ENT5NTE
EC: 3.1.3.35 (PDB Primary Data), 3.1.3.5 (PDB Primary Data), 3.1.3.89 (PDB Primary Data), 3.1.3.91 (PDB Primary Data), 3.1.3.99 (PDB Primary Data)
UniProt & NIH Common Fund Data Resources
Find proteins for P21589 (Homo sapiens)
Explore P21589 
Go to UniProtKB:  P21589
PHAROS:  P21589
GTEx:  ENSG00000135318 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP21589
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
HB0038 Fab light chainB [auth E],
G [auth C]
104Homo sapiensMutation(s): 0 
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
HB0038 Fab heavy chainC [auth F],
H [auth D]
124Homo sapiensMutation(s): 0 
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  • Reference Sequence
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
HB0039 Fab heavy chainD [auth I],
I [auth G]
117Homo sapiensMutation(s): 0 
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  • Reference Sequence
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
HB0039 Fab light chainE [auth J],
J [auth H]
103Homo sapiensMutation(s): 0 
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download Ideal Coordinates CCD File 
K [auth A],
L [auth A],
O [auth B],
P [auth B]
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
CA
Query on CA

Download Ideal Coordinates CCD File 
N [auth A],
R [auth B]
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
NA
Query on NA

Download Ideal Coordinates CCD File 
M [auth A],
Q [auth B]
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.06 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Foundation of China (NSFC)China--

Revision History  (Full details and data files)

  • Version 1.0: 2025-02-05
    Type: Initial release
  • Version 1.1: 2025-02-19
    Changes: Data collection, Source and taxonomy