PDE12: The 2',5'-Oligoadenylate Phosphodiesterase Regulating Innate Immunity and Mitochondrial Function
A comprehensive biomedical overview of PDE12, its genomic context, protein function, expression patterns, and clinical relevance.
Gene Information Card
| Symbol | PDE12 |
|---|---|
| Full Name | Phosphodiesterase 12 |
| Gene Type | Protein coding |
| Chromosomal Location | 3p14.3 |
| NCBI Gene ID | 201626 ncbi.nlm.nih.gov/gene/201626 |
| Ensembl ID | ENSG00000114315 |
| UniProt ID | Q6L8Q7 |
| OMIM ID | 610797 |
| HGNC ID | 25305 |
| Aliases | 2'-PDE, 2',5'-PDE, 2',5'-phosphodiesterase 12, mitochondrial 2',5'-phosphodiesterase 12 |
Description
PDE12 encodes a member of the phosphodiesterase family that specifically degrades 2',5'-linked oligoadenylates (2-5A). This protein plays a critical role in the regulation of the innate immune response by modulating the 2-5A/RNase L pathway. It is localized to mitochondria and is also involved in mitochondrial RNA processing and translation, impacting cellular energy metabolism. The gene is located on chromosome 3p14.3 and is expressed in a wide range of tissues.
Disease Associations
| Disease category | Pathophysiological mechanism | Genomic evidence |
|---|---|---|
| Disease | Mechanism | Evidence |
| Viral Infections | PDE12 degrades 2-5A, the activator of RNase L, thereby negatively regulating the antiviral innate immune response. Reduced PDE12 activity enhances the 2-5A/RNase L pathway, leading to increased viral RNA degradation and inhibition of viral replication. | Studies show that knockdown of PDE12 in cell lines increases resistance to various RNA viruses, including encephalomyocarditis virus (EMCV) and vesicular stomatitis virus (VSV). (NCBI Gene, UniProt) |
| Mitochondrial Disorders | PDE12 is involved in mitochondrial RNA processing. Its dysfunction can lead to aberrant mitochondrial RNA metabolism, potentially affecting mitochondrial protein synthesis and oxidative phosphorylation, which may contribute to mitochondrial dysfunction. | PDE12 is localized to the mitochondrial matrix and interacts with mitochondrial RNA. Its depletion affects mitochondrial RNA processing and translation. (UniProt, PubMed) |
| Cancer | The role of PDE12 in cancer is complex and context-dependent. By regulating the 2-5A/RNase L pathway, it may influence apoptosis and cell proliferation. Some studies suggest altered PDE12 expression in certain cancers, potentially affecting tumor growth and response to therapy. | Data from COSMIC and other cancer databases show somatic mutations and copy number alterations in PDE12 across various cancer types, though the functional consequences are still under investigation. (COSMIC) |
Expression Profile
Tissue Expression
| Tissue | nTPM | level |
|---|---|---|
| Tissue | nTPM | Level |
| Liver | 20.1 | Medium |
| Kidney | 15.3 | Medium |
| Heart | 12.4 | Medium |
| Brain | 8.2 | Low |
| Lung | 7.5 | Low |
| Skeletal Muscle | 6.1 | Low |
Cell Line Expression
| Cell Line | nTPM | Notes |
|---|---|---|
| Cell Line | nTPM | Notes |
| HepG2 (Liver) | 18.5 | High expression consistent with liver tissue data. |
| A549 (Lung) | 8.9 | Moderate expression. |
| MCF7 (Breast) | 6.2 | Low expression. |
| K562 (Leukemia) | 5.1 | Low expression. |
Data source：Human Protein Atlas（proteinatlas.org）
Mutations & Variants
Hotspot Mutations
| Variant | Type | Frequency | Functional Description |
|---|---|---|---|
| Variant | Type | Frequency | Effect |
| c.1045C>T (p.Arg349Trp) | Missense | Rare (<0.01%) | Located in the catalytic domain; predicted to be damaging, potentially reducing enzymatic activity. |
| c.1582A>G (p.Ile528Val) | Missense | Rare (<0.01%) | Located in a non-catalytic region; likely benign, but functional impact is unknown. |
| c.1234_1235insA (p.Thr412AsnfsTer19) | Frameshift | Very rare | Predicted to result in a truncated protein lacking the C-terminal domain, likely causing loss of function. |
Mutation functional classification
Loss of Function (LOF)
Mutations that disrupt the catalytic site or lead to a truncated protein are predicted to cause a loss of function. This would result in increased levels of 2-5A, leading to constitutive activation of RNase L and a heightened antiviral state, but potentially also increased apoptosis.
Gain of Function (GOF)
No clear gain-of-function mutations have been described for PDE12. Overexpression of the wild-type protein is the primary mechanism to increase its activity, leading to enhanced degradation of 2-5A and suppression of the RNase L pathway.
Dominant Negative (DN)
No dominant-negative mutations have been reported. Given that PDE12 likely functions as a dimer, a mutant subunit could potentially interfere with the wild-type protein, but this has not been experimentally demonstrated.
View complete mutation data：
Gene Ontology (GO)
| • 2' | • 5'-oligoadenylate phosphodiesterase activity |
| • 3' | • 5'-cyclic-nucleotide phosphodiesterase activity |
| • metal ion binding | • manganese ion binding |
| • zinc ion binding | • mitochondrial matrix |
| • mitochondrion | • RNA binding |
| • mRNA binding | • nucleic acid phosphodiester bond hydrolysis |
| • RNA catabolic process | • innate immune response |
| • mitochondrial RNA processing | • mitochondrial translation |
Pathways
• 2-5A/RNase L pathway (Antiviral Innate Immunity)
• Mitochondrial RNA metabolism and translation
Protein Summary
The PDE12 protein is a 2',5'-phosphodiesterase primarily localized to the mitochondrial matrix. It is a key negative regulator of the antiviral 2-5A/RNase L pathway by degrading 2',5'-linked oligoadenylates, thereby preventing RNase L activation. In mitochondria, it is involved in the processing of mitochondrial RNA, including the removal of 2',5'-linked branches from RNA molecules, which is crucial for proper mitochondrial translation and function. The protein contains a metallo-beta-lactamase domain that is responsible for its catalytic activity, requiring metal ions such as manganese or zinc for function.
Related Services
Related Products
| Product name | Cat.No. | Species | Gene ID | |
|---|---|---|---|---|
| PDE12 Knockout HEK293 Cell Line | EDJ-KQ4153 | Human | 201626 | Details Get a Quote |
| PDE12 Knockout A-549 Cell Line | EDJ-KQ27804 | Human | 201626 | Details Get a Quote |
| PDE12 Knockout HCT 116 Cell Line | EDJ-KQ27806 | Human | 201626 | Details Get a Quote |
| PDE12 Knockout HeLa Cell Line | EDJ-KQ27807 | Human | 201626 | Details Get a Quote |
