SEC11 Antibody

Molecular Role of SEC11 Proteins

The SEC11 homologs (e.g., SEC11A, SEC11C) are catalytic subunits of the SPC, which cleaves N-terminal signal peptides from nascent proteins during translocation into the ER lumen . Key functions include:

• Signal Peptide Cleavage: Essential for maturation of secretory and membrane proteins .

• Quality Control: The SPC, including SEC11C, degrades misfolded membrane proteins to maintain ER proteostasis .

• SNARE Regulation: In plants, SEC11 interacts with Qa-SNARE SYP121 to regulate vesicle fusion and SNARE complex recycling .

SEC11 Antibody Characteristics

SEC11 antibodies are polyclonal or monoclonal reagents optimized for applications such as Western blot (WB), ELISA, and immunohistochemistry (IHC). Below is a comparative analysis of commercially available SEC11 antibodies:

SEC11 in Protein Quality Control

• The human SPC, including SEC11C, cleaves structurally defective membrane proteins, facilitating their degradation via ER-associated pathways .

• Mutations in SEC11 orthologs disrupt signal peptide processing in yeast (Saccharomyces cerevisiae), leading to lethal phenotypes and accumulation of unprocessed proteins .

SEC11-SNARE Interactions

• In Arabidopsis, SEC11 binds the N-terminal domain of SYP121, a plasma membrane Qa-SNARE, to regulate secretory traffic .

• SEC11 competes with SNAP33 and VAMP721 for SYP121 binding, suggesting a "handshake" mechanism to modulate SNARE complex assembly .

Applications in Research

• Western Blot: Detects SEC11C in mouse lymphoid tissues (e.g., spleen, lymph nodes) .

• Immunohistochemistry: Localizes SEC11A/C in human tonsil and cancer tissues .

• Functional Studies: Used to validate SEC11 knockdown/knockout models in studies of ER stress and vesicle trafficking .

Future Directions

• Therapeutic Targeting: SEC11C’s role in ER quality control positions it as a potential target for protein-misfolding disorders .

• SNARE Dynamics: Further studies on SEC11-SYP121 interactions could elucidate plant-specific secretory mechanisms .