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Target intelligence / Profile preview
Envelope Glycoprotein V3 Loop of Human Immunodeficiency Virus Type 1 (V3 Loop)
- Target
- V3 Loop
- Molecular classification
- Glycoprotein, Viral Protein, Envelope Protein, Loop Region
01
Overview
The V3 loop is the third variable region (V3) of the HIV-1 envelope glycoprotein gp120, a critical component of the viral spike that mediates entry into host cells. The V3 loop is located on the outer domain of gp120 and typically consists of 33–35 amino acids, bounded by two invariant cysteines that form a disulfide bond to create its characteristic loop structure. It plays a crucial role in coreceptor binding (CCR5 or CXCR4), determines viral tropism, and is a major target for neutralizing antibodies. However, its high sequence variability and conformational flexibility pose significant challenges for vaccine development.
- Other names
- HIV-1 V3 Loopgp120 V3 LoopThird Variable Region of gp120
02
Mechanism of action
N/A
03
Biological functions
Coreceptor BindingViral EntryImmune EvasionAntigenic Site
04
Disease associations
InfectionHIV-1 PathogenesisAIDS Progression
05
Safety considerations
High sequence variabilityConformational masking of epitopesStrain-specific antibody responsesChallenges in broad-spectrum vaccine development
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