rer-1 Antibody

Definition and Biological Role of RER1

RER1 (Retention in Endoplasmic Reticulum 1) is a conserved transmembrane protein critical for regulating protein trafficking between the endoplasmic reticulum (ER) and Golgi apparatus. It functions as a sorting receptor, retrieving unassembled subunits of oligomeric protein complexes back to the ER to ensure proper protein assembly and quality control . RER1 is implicated in neurodegenerative diseases, neuromuscular junction maintenance, and proteostasis .

RER1 Antibody: Key Applications

RER1 antibodies are essential tools for detecting and studying RER1 in various biological contexts.

Common Applications

• Immunohistochemistry (IHC): Localizes RER1 in tissues (e.g., human uterus) .

• Western Blot (WB): Detects RER1 expression in cell lysates .

• ELISA: Quantifies RER1 levels in research samples .

• Functional Studies: Investigates RER1’s role in ER-Golgi trafficking, neurodegenerative disease mechanisms, and protein degradation pathways .

Example: Goat Anti-RER1 Antibody (A84358)

Role in Neurodegenerative Diseases

• RER1 overexpression reduces α-synuclein (αSyn) levels by enhancing proteasomal degradation, with specificity for αSyn’s NAC domain. This effect extends to disease-causing mutants (A30P, A53T, E46K) .

• In Alzheimer’s disease models, RER1 modulates γ-secretase complex trafficking, reducing amyloid-β (Aβ) production .

Neuromuscular Junction Regulation

• RER1 knockdown in C2C12 muscle cells decreases surface acetylcholine receptor (AChRα) levels, impairing neuromuscular junction formation .

• In vivo, RER1 haploinsufficiency in mice reduces neuromuscular synapse size .

Proteostasis and Cell Competition

• Drosophila RER1 is essential for maintaining proteostasis. Loss of RER1 triggers ER stress and activates the unfolded protein response (UPR), leading to cell competition and apoptosis .

Critical Considerations for Use

• Specificity: Verify antibody reactivity across species (e.g., human, mouse, rat) .

• Degradation Pathways: RER1-deficient cells show lysosomal degradation of escaped ER proteins (e.g., AChRα) .

• Functional Rescue: Co-expression of GFP-tagged RER1 restores proteostasis in Drosophila models .