Is TMEM70 p.Val12= (c.36C>A) pathogenic?

TMEM70 p.Val12= (c.36C>A) is classified Likely benign in TMEM70 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-10-21). Very rare (popmax 0.00834%, amr); Associated with mitochondrial complex V (ATP synthase) deficiency, nuclear type 2.

What condition is associated with TMEM70 p.Val12= (c.36C>A)?

TMEM70 p.Val12= (c.36C>A) is associated with mitochondrial complex V (ATP synthase) deficiency, nuclear type 2 (ClinVar).

How common is TMEM70 p.Val12= (c.36C>A) in the general population?

TMEM70 p.Val12= (c.36C>A) is very rare (popmax 0.00834%, amr) (gnomAD).

TMEM70 p.Val12=

Q: How is TMEM70-related mitochondrial encephalo-cardio-myopathy inherited?

Typically Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

c.36C>A · rs775732442 · VCV1570498

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00834%, amr)

Conditions

mitochondrial complex V (ATP synthase) deficiency, nuclear type 2

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -2.3	GERP -4
Overall
CADD	1.789	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00834% Admixed American · 5/59,986 alleles

Filtering AF 0.00323% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00207%

Overall 0.000375% 6/1,600,832 alleles · very rare exomes 6/1,448,498 · genomes 0/152,334 · joint denominator

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.00834%	11,997
European (non-Finnish)	8.48e-05%	1,179,585

Rarity supports pathogenicity (ACMG PM2); frequency above a disease-specific BA1/BS1 threshold argues against it. A variant frequent in one ancestry group can be near-absent in others, so a single global figure can mislead.

Variant & gene context

Gene: TMEM70
Protein: p.Val12=
Coding: c.36C>A
MANE Select: NM_017866
dbSNP: rs775732442
Type: single nucleotide variant
Location: chr8:73976317 (GRCh38)
Gene constraint: LOEUF 1.375 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 73.16

Full TMEM70 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

mitochondrial complex V (ATP synthase) deficiency, nuclear type 2 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For TMEM70-related mitochondrial encephalo-cardio-myopathy (Orphanet):

Inheritance: Autosomal recessive
Onset: Infancy, Neonatal

Similar variants

TMEM70 c.317-2A>G Pathogenic/Likely pathogenic ★★ same condition
TMEM70 p.Arg80Ter Pathogenic ★★ same condition
TMEM70 p.Ala174Thr Uncertain significance ★★ ⚠ same condition
TMEM70 p.Ala205Ser Uncertain significance ★★ ⚠ same condition
TMEM70 p.Arg255Trp Uncertain significance ★★ ⚠ same condition
TMEM70 p.Arg80Gln Uncertain significance ★★ ⚠ same condition
TMEM70 p.Asp239His Uncertain significance ★★ ⚠ same condition
TMEM70 p.Cys24Arg Uncertain significance ★★ ⚠ same condition

Built on 18 open, versioned datasets — ClinVar, gnomAD, AlphaMissense, REVEL, ClinGen & more — plus Sugi Variant's own cross-source analysis. Source data 2026-01–2026-10, ClinVar 2026-10. Full sources & versions →

Cite Sugi Variant

Gür T. Sugi Variant: A Deterministic Per-Variant Germline Reference from a Knowledge Graph for Humans and AI Agents. 2026. doi:10.5281/zenodo.21509445. This variant: https://sugi.bio/variant/tmem70-p-val12 (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown