A8339G

# **General Information**

| **Position** | **8339** | **Variant** | **m.8339A\>G** | **Locus** | **MT\-TK** | **RNA** | **tRNA Lys** |
| --- | --- | --- | --- | --- | --- | --- | --- |
| **Homoplasmy** | nr | **Heteroplasmy** | nr | **mitoTIP** | 47\.60% | **Pathogenicity** | Reported |

"Pathogenicity" status is derived from published literature or predictions from bioinformatics tools. Researchers and clinicians are cautioned that additional data and/or analysis may still be necessary to confirm the pathological significance of these variants. For more information, please see [Mitofam Info](https://mitofam.com/doc/385/).

# **Pedigree Information**

The **m.8339A\>G** variant in MT\-TK has been reported in 1 pedigree. To date, 1 carrier has been reported. Mutation\-load data were not available. The main clinical manifestations among affected carriers included 100 dB, PTA 100, and profound non\-syndromic hearing loss.

| **No.** | **Position** | **Variant** | **Family ID** | **Nationality** | **Diseases** | **Unaffected Maternal Relatives** | **Affected Maternal Relatives** | **Publication Year** | **PMID/Ref** | **Note** |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | 8339 | m.8339A\>G | A8339G\-F1 | Chinese | Non\-syndromic hearing loss | 0 | 0 | 2020 | [32169613](https://pubmed.ncbi.nlm.nih.gov/32169613/) | Table 2 proband SF40 |

# **Carrier Information**

| **No.** | **Position** | **Variant** | **Family ID** | **Carrier ID** | **Type (Fam/De novo/Uninf)** | **Gender (F/M)** | **Proband (Y/N)** | **Affected (Y/N)** | **Die/Alive(D/A)** | **Age** | **Blood Mutant Level** | **Muscle Mutant level** | **Urine Mutant level** | **Other Mutant level** | **Clinical Features** | **Note** |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | 8339 | m.8339A\>G | A8339G\-F1 | A8339G\-F1\-P1 | Uninf | F | Y | Y | ND | ND | / | / | / | / | Profound non\-syndromic hearing loss; PTA 100/100 dB | Proband SF40; peripheral blood Sanger positive, heteroplasmy not reported; haplogroup F1a1c; family history yes |

For abbreviations and other usage instructions, please see [Mitofam Info](https://mitofam.com/doc/385/).