6F6O

Structure of Adenovirus 3 fiber head V239D mutant

Summary for 6F6O

• Entry DOI: 10.2210/pdb6f6o/pdb
• Related: 4wyj
• Descriptor: Fiber protein (2 entities in total)
• Functional Keywords: adenovirus 3 fiber head, capsid protein, cell adhesion, viral protein
• Biological source: Human adenovirus B serotype 3 (HAdV-3)
• Total number of polymer chains: 1
• Total formula weight: 21784.54

Authors

Zubieta, C.,Fender, P.,Stermann, E.,Lieber, A. (deposition date: 2017-12-05, release date: 2018-12-19, Last modification date: 2024-01-17)

Primary citation

Richter, M.,Yumul, R.,Wang, H.,Saydaminova, K.,Ho, M.,May, D.,Baldessari, A.,Gough, M.,Drescher, C.,Urban, N.,Roffler, S.,Zubieta, C.,Carter, D.,Fender, P.,Lieber, A.
Preclinical safety and efficacy studies with an affinity-enhanced epithelial junction opener and PEGylated liposomal doxorubicin.
Mol Ther Methods Clin Dev, 2:15005-15005, 2015

PubMed Abstract: A central treatment resistance mechanism in solid tumors is the maintenance of epithelial junctions between malignant cells that prevent drug penetration into the tumor. We have developed a small recombinant protein (JO-1) that triggers the transient opening of intercellular junctions and thus increases the efficacy of monoclonal antibodies and chemotherapeutic drugs without causing toxicity in mouse tumor models. Here, we provide data toward the clinical translation of an affinity-enhanced version of JO-1, which we call JO-4, in combination with PEGylated liposomal doxorubicin (PLD)/Doxil for ovarian cancer therapy. We have presented X-ray crystallography data suggesting a structural basis for the higher affinity of JO-4 to DSG2. We also confirmed JO-4 efficacy in a xenograft model with primary ovarian cancer cells showing that JO-4 can salvage Doxil therapy when given at a dose that was threefold lower than the therapeutic dose. Furthermore, we tested the safety of intravenous JO-4 alone and in combination with Doxil in Macaca fascicularis, an adequate animal model for predicting toxicity in humans. Our studies did not show critical JO-4-related toxicity or an increase of Doxil-related side effects. Our efficacy and safety data will help to support an Investigational new drug-filing for a JO-4/Doxil combination treatment.

PubMed: 26029716
DOI: 10.1038/mtm.2015.5

Experimental method

X-RAY DIFFRACTION (1.49 Å)