6XXV image
Entry Detail
PDB ID:
6XXV
Keywords:
Title:
Crystal Structure of a computationally designed Immunogen S2_1.2 in complex with its elicited antibody C57
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2020-01-28
Release Date:
2020-04-22
Method Details:
Experimental Method:
Resolution:
2.20 Å
R-Value Free:
0.24
R-Value Work:
0.20
R-Value Observed:
0.20
Space Group:
C 1 2 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Antibody C57, Heavy Chain
Chain IDs:A, D
Chain Length:251
Number of Molecules:2
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Antibody C57, Light Chain
Chain IDs:B, E
Chain Length:233
Number of Molecules:2
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:S2_1.2
Chain IDs:C, F
Chain Length:124
Number of Molecules:2
Biological Source:Homo sapiens
Primary Citation

Abstact

De novo protein design has been successful in expanding the natural protein repertoire. However, most de novo proteins lack biological function, presenting a major methodological challenge. In vaccinology, the induction of precise antibody responses remains a cornerstone for next-generation vaccines. Here, we present a protein design algorithm called TopoBuilder, with which we engineered epitope-focused immunogens displaying complex structural motifs. In both mice and nonhuman primates, cocktails of three de novo-designed immunogens induced robust neutralizing responses against the respiratory syncytial virus. Furthermore, the immunogens refocused preexisting antibody responses toward defined neutralization epitopes. Overall, our design approach opens the possibility of targeting specific epitopes for the development of vaccines and therapeutic antibodies and, more generally, will be applicable to the design of de novo proteins displaying complex functional motifs.

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