eef-1B.1 Antibody

Definition and Target

The eEF-1B.1 antibody specifically recognizes the beta1 subunit of the eukaryotic elongation factor 1B (eEF1Bβ1), a component of the eEF1B complex. This complex facilitates GTP-GDP exchange on eEF1A, enabling the delivery of aminoacyl-tRNAs to ribosomes during translation elongation .

Key Domains of eEF1Bβ1:

• N-terminal: Binds eEF1Bγ .

• C-terminal: Critical for stabilizing eEF1Bδ and eEF1Bα interactions .

Deficiency in eEF1Bβ1 destabilizes the eEF1B complex, reducing translation efficiency and viral protein synthesis (e.g., influenza A/WSN) .

Role in Cell Viability

Knockdown of eEF1B subunits (α, δ, γ) in human cell lines (HCT116, DLD1) reduces cell viability by 14–20% and disrupts cell-cycle progression:

Data derived from siRNA-mediated subunit ablation .

Viral Protein Synthesis

eEF1Bβ1 deficiency in A549 cells reduces influenza A/WSN virus titers by >50% at 24 h post-infection. This correlates with diminished viral M1 protein expression, despite unaffected viral RNA levels .

Applications in Research

• Mechanistic Studies: Used to investigate eEF1B complex stability and GTP exchange dynamics .

• Virology: Identifies host factors required for viral replication (e.g., strain-specific dependency in influenza A) .

• Plant Biology: Detects eEF1Bβ1 in Arabidopsis thaliana and related species .

Limitations and Considerations

• Cross-Reactivity: Limited data exist for mammalian systems; most studies focus on plants or yeast .

• Subunit Interdependence: Ablation of one subunit (e.g., eEF1Bγ) reduces expression of others, complicating functional studies .