T8821G

# **General Information**

| **Position** | **8821** | **Variant** | **m.8821T\>G** | **Locus** | **MT\-ATP6** | **Amino\-AcidChange** | **S99A** |
| --- | --- | --- | --- | --- | --- | --- | --- |
| **Homoplasmy** | nr | **Heteroplasmy** | nr | **APOGEE2** | Likely\-benign | **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.8821T\>G** variant in MT\-ATP6 has been reported in 1 pedigree. To date, 1 carrier has been reported. Homoplasmy was reported in 1/1 carriers (100%), and 1/1 carriers (100%) were affected. The main clinical manifestations among affected carriers included LHON, bilateral visual impairment onset 17, and visual acuity below 0\.01\..

| **No.** | **Position** | **Variant** | **Family ID** | **Nationality** | **Diseases** | **Unaffected Maternal Relatives** | **Affected Maternal Relatives** | **Publication Year** | **PMID/Ref** | **Note** |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | 8821 | m.8821T\>G | T8821G\-F1 | China | LHON; possible modifier with G11778A | 0 | 0 | 2005 | [15896721](https://pubmed.ncbi.nlm.nih.gov/15896721/) |  |

# **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 | 8821 | m.8821T\>G | T8821G\-F1 | T8821G\-F1\-P1 | Uninf | M | Y | Y | A | 20 | Homo | / | / | / | LHON; bilateral visual impairment onset 17; visual acuity below 0\.01\. | Whole\-blood complete mtDNA sequence; coexisting G11778A. |

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