Introducing metallocene into a triazole peptide conjugate reduces its off-rate and enhances its affinity and antiviral potency for HIV-1 gp120.
J Mol Recognit
; 22(2): 169-74, 2009.
Article
en En
| MEDLINE
| ID: mdl-18498083
ABSTRACT
In this work, we identified a high affinity and potency metallocene-containing triazole peptide conjugate that suppresses the interactions of HIV-1 envelope gp120 at both its CD4 and co-receptor binding sites. The ferrocene-peptide conjugate, HNG-156, was formed by an on-resin copper-catalysed [2+3] cycloaddition reaction. Surface plasmon resonance interaction analysis revealed that, compared to a previously reported phenyl-containing triazole conjugate HNG-105 (105), peptide 156 had a higher direct binding affinity for several subtypes of HIV-1 gp120 due mainly to the decreased dissociation rate of the conjugate-gp120 complex. The ferrocene triazole conjugate bound to gp120 of both clade A (92UG037-08) and clade B (YU-2 and SF162) virus subtypes with nanomolar KD in direct binding and inhibited the binding of gp120 to soluble CD4 and to antibodies that bind to HIV-1YU-2 gp120 at both the CD4 binding site and CD4-induced binding sites. HNG-156 showed a close-to nanomolar IC50 for inhibiting cell infection by HIV-1BaL whole virus. The dual receptor site antagonist activity and potency of HNG-156 make it a promising viral envelope inhibitor lead for developing anti-HIV-1 treatments.
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Compuestos Organometálicos
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Fragmentos de Péptidos
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Triazoles
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Proteína gp120 de Envoltorio del VIH
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VIH-1
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Fármacos Anti-VIH
Límite:
Humans
Idioma:
En
Revista:
J Mol Recognit
Asunto de la revista:
BIOLOGIA MOLECULAR
Año:
2009
Tipo del documento:
Article
País de afiliación:
Estados Unidos