Primary Function: Facilitates efficient translocation of unfolded proteins across the cytoplasmic membrane by stabilizing the SecYE translocon .
Proton Motive Force (PMF) Interaction: Enhances the rate of translocation via interactions with the PMF, though its exact mechanism in archaea remains under investigation .
Non-Essential but Critical: While not indispensable for translocation per se, SecF significantly improves the efficiency of the process .
Recombinant SecF is used to investigate:
Mechanisms of Cotranslational vs. Posttranslational Translocation: While archaeal Sec systems lack SecA (absent in M. kandleri), SecF’s role in stabilizing the translocon during PMF-dependent export is a focus .
Membrane Protein Biogenesis: Studies on how SecF interacts with the SecYE complex to facilitate insertion of hydrophobic segments into the membrane .
Commercial ELISA kits (e.g., CSB-CF844835MSI) utilize recombinant SecF for:
Antibody Validation: Detecting anti-SecF antibodies in serum or purified samples .
Quantitative Protein Analysis: Measuring SecF concentrations in M. kandleri lysates or recombinant preparations .
Cross-Domain Homology: SecF’s role in enhancing translocation is conserved in bacteria and archaea, despite differences in accessory components like SecA .
KEGG: mka:MK1008
STRING: 190192.MK1008