Target intelligence / Profile preview

Hemagglutinin Stem Domain (HA Stem)

Target: HA Stem
Molecular classification: Glycoprotein, Viral Protein, Membrane protein, Fusion protein

Overview

The hemagglutinin (HA) stem domain is a structurally conserved region of the influenza virus HA protein. It mediates membrane fusion, anchors the protein to the viral membrane, and is a target for broadly neutralizing antibodies, making it a key area for universal vaccine development.

Other names: HA Stem DomainHemagglutinin stalk domain

Mechanism of action

Target for broadly neutralizing antibodies (bnAbs) that inhibit membrane fusion.

Biological functions

Membrane fusionViral entryReceptor binding (indirectly, via HA)Anchoring viral proteins

Disease associations

InfluenzaViral infection

Safety considerations

Accessibility limitations due to glycan shieldingChallenges in eliciting broadly neutralizing antibodies

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