A8021G

# **General Information**

| **Position** | **8021** | **Variant** | **m.8021A\>G** | **Locus** | **MT\-CO2** | **Amino\-AcidChange** | **I146V** |
| --- | --- | --- | --- | --- | --- | --- | --- |
| **Homoplasmy** | \+ | **Heteroplasmy** | \- | **APOGEE2** | 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.8021A\>G** variant in MT\-CO2 has been reported in 4 pedigrees. To date, 4 carriers have been reported. Reported mutation loads ranged from 98%, with a median of 98% overall; affected carriers showed mutation loads from 98%, with a median of 98%. The main clinical manifestations among affected carriers included asthenozoospermia, low sperm motility, and male infertility.

| **No.** | **Position** | **Variant** | **Family ID** | **Nationality** | **Diseases** | **Unaffected Maternal Relatives** | **Affected Maternal Relatives** | **Publication Year** | **PMID/Ref** | **Note** |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | 8021 | m.8021A\>G | A8021G\-F1 | Tunisia | Asthenozoospermia / male infertility | ND | ND | 2014 | [24931671](https://pubmed.ncbi.nlm.nih.gov/24931671/) |  |
| 2 | 8021 | m.8021A\>G | A8021G\-F2 | Tunisia | Asthenozoospermia / male infertility | ND | ND | 2014 | [24931671](https://pubmed.ncbi.nlm.nih.gov/24931671/) |  |
| 3 | 8021 | m.8021A\>G | A8021G\-F3 | Tunisia | Asthenozoospermia / male infertility | ND | ND | 2014 | [24931671](https://pubmed.ncbi.nlm.nih.gov/24931671/) |  |
| 4 | 8021 | m.8021A\>G | A8021G\-F4 | Tunisia | Asthenozoospermia / male infertility | ND | ND | 2014 | [24931671](https://pubmed.ncbi.nlm.nih.gov/24931671/) |  |

# **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 | 8021 | m.8021A\>G | A8021G\-F1 | A8021G\-F1\-P1 | Uninf | M | ND | Y | ND | ND | / | / | / | 98%(sperm) | Asthenozoospermia; male infertility; low sperm motility |  |
| 2 | 8021 | m.8021A\>G | A8021G\-F2 | A8021G\-F2\-P1 | Uninf | M | ND | Y | ND | ND | / | / | / | 98%(sperm) | Asthenozoospermia; male infertility; low sperm motility |  |
| 3 | 8021 | m.8021A\>G | A8021G\-F3 | A8021G\-F3\-P1 | Uninf | M | ND | Y | ND | ND | / | / | / | 98%(sperm) | Asthenozoospermia; male infertility; low sperm motility |  |
| 4 | 8021 | m.8021A\>G | A8021G\-F4 | A8021G\-F4\-P1 | Uninf | M | ND | Y | ND | ND | / | / | / | 98%(sperm) | Asthenozoospermia; male infertility; low sperm motility |  |

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