Recombinant Human Peptidyl-prolyl cis-trans isomerase FKBP8 (FKBP8) is a protein produced through recombinant DNA technology. It belongs to the family of FK506 binding proteins, which are known for their peptidyl-prolyl cis-trans isomerase activity. This enzyme plays a crucial role in protein folding and has been implicated in various cellular processes, including autophagy and mitochondrial dynamics.
Recombinant FKBP8 can be produced in various expression systems, including yeast, E. coli, baculovirus, and mammalian cells. Each system offers different advantages in terms of yield, purity, and post-translational modifications. For example, yeast and E. coli are commonly used for large-scale production due to their high yield and cost-effectiveness, while mammalian cells provide more authentic post-translational modifications .
| Expression System | Advantages | Disadvantages |
|---|---|---|
| Yeast | High yield, cost-effective | Limited post-translational modifications |
| E. coli | High yield, cost-effective | Limited post-translational modifications |
| Baculovirus | High yield, suitable for complex proteins | Requires insect cell culture |
| Mammalian Cells | Authentic post-translational modifications | Lower yield, higher cost |
FKBP8 is involved in several critical biological processes:
Mitochondrial Dynamics and Autophagy: FKBP8 facilitates mitochondrial fragmentation, which is essential for mitophagy, a process by which damaged mitochondria are degraded to maintain cellular health .
Protein Folding: As a peptidyl-prolyl cis-trans isomerase, FKBP8 helps in the proper folding of proteins, which is crucial for their function and stability.
Interaction with Other Proteins: FKBP8 interacts with proteins like VISA, suggesting its role in signaling pathways .
Recent studies have highlighted the importance of FKBP8 in autophagy regulation. The absence of FKBP8 impairs autophagy activation, indicating its role as a regulatory protein in starvation-activated autophagy . Additionally, FKBP8 variants have been associated with spina bifida, suggesting its involvement in developmental processes .
FKBP8 exhibits cytoplasmic expression with a granular pattern in most cell types, as observed in human tissues. This widespread expression underscores its potential role in various cellular processes across different tissues .
Given its involvement in autophagy and mitochondrial dynamics, FKBP8 may have implications for diseases related to mitochondrial dysfunction or impaired autophagy. Further research is needed to explore its therapeutic potential.
Recombinant Human Peptidyl-prolyl cis-trans isomerase FKBP8 (FKBP8) is a constitutively inactive peptidyl-prolyl isomerase that becomes active upon binding to calmodulin and calcium. It functions as a chaperone for BCL2, targeting it to the mitochondria and modulating its phosphorylation state. The BCL2/FKBP8/calmodulin/calcium complex likely interferes with BCL2's interaction with its targets. Therefore, the active form of FKBP8 may play a significant role in apoptosis regulation.
Relevant Research Publications: