8GD5 image
Entry Detail
PDB ID:
8GD5
Title:
Crystal Structure of HIV-1 LM/HT Clade A/E CRF01 GP120 Core in Complex with DL-I-102
Biological Source:
Host Organism:
PDB Version:
Deposition Date:
2023-03-03
Release Date:
2023-06-07
Method Details:
Experimental Method:
Resolution:
2.60 Å
R-Value Free:
0.27
R-Value Work:
0.21
R-Value Observed:
0.22
Space Group:
P 21 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:HIV-1 LM/HS clade A/E CRF01 gp120 core
Mutations:H61Y,Q105H,V108I,H375T,N474D,I475M,K476R
Chain IDs:A
Chain Length:355
Number of Molecules:1
Biological Source:Human immunodeficiency virus 1
Primary Citation
Piperidine CD4-Mimetic Compounds Expose Vulnerable Env Epitopes Sensitizing HIV-1-Infected Cells to ADCC.
Viruses 15 ? ? (2023)
PMID: 37243271 DOI: 10.3390/v15051185

Abstact

The ability of the HIV-1 accessory proteins Nef and Vpu to decrease CD4 levels contributes to the protection of infected cells from antibody-dependent cellular cytotoxicity (ADCC) by preventing the exposure of Env vulnerable epitopes. Small-molecule CD4 mimetics (CD4mc) based on the indane and piperidine scaffolds such as (+)-BNM-III-170 and (S)-MCG-IV-210 sensitize HIV-1-infected cells to ADCC by exposing CD4-induced (CD4i) epitopes recognized by non-neutralizing antibodies that are abundantly present in plasma from people living with HIV. Here, we characterize a new family of CD4mc, (S)-MCG-IV-210 derivatives, based on the piperidine scaffold which engages the gp120 within the Phe43 cavity by targeting the highly conserved Asp368 Env residue. We utilized structure-based approaches and developed a series of piperidine analogs with improved activity to inhibit the infection of difficult-to-neutralize tier-2 viruses and sensitize infected cells to ADCC mediated by HIV+ plasma. Moreover, the new analogs formed an H-bond with the α-carboxylic acid group of Asp368, opening a new avenue to enlarge the breadth of this family of anti-Env small molecules. Overall, the new structural and biological attributes of these molecules make them good candidates for strategies aimed at the elimination of HIV-1-infected cells.

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