Is MDM2 p.Val81= (c.243A>G) pathogenic?

MDM2 p.Val81= (c.243A>G) is classified Likely benign in MDM2 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-04-11). Very rare (popmax 0.00441%, sas); Associated with Accelerated tumor formation, susceptibility to.

What condition is associated with MDM2 p.Val81= (c.243A>G)?

MDM2 p.Val81= (c.243A>G) is associated with Accelerated tumor formation, susceptibility to (ClinVar).

How common is MDM2 p.Val81= (c.243A>G) in the general population?

MDM2 p.Val81= (c.243A>G) is very rare (popmax 0.00441%, sas) (gnomAD).

MDM2 p.Val81=

c.243A>G · rs775062825 · VCV1631003

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00441%, sas)

Conditions

Accelerated tumor formation, susceptibility to

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP -1.3	GERP -3.6
Overall
CADD	4.755	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00441% South Asian · 4/90,698 alleles

Filtering AF 0.00143% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000894%

Overall 0.000992% 16/1,612,952 alleles · very rare exomes 14/1,460,740 · genomes 2/152,212 · joint denominator

Ancestry group	Frequency	1 in
South Asiangrpmax	0.00441%	22,675
Admixed American	0.00167%	59,758
Remaining individualsnot grpmax-eligible	0.0016%	62,452
European (non-Finnish)	0.000848%	117,969

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: MDM2
Protein: p.Val81=
Coding: c.243A>G
MANE Select: NM_002392
dbSNP: rs775062825
Type: single nucleotide variant
Location: chr12:68816880 (GRCh38)
Gene constraint: LOEUF 0.325 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 63.24 · 148 PDB
Residue 81: the swib/mdm2 domain; the 'necessary for interaction with usp2' region; the 'sufficient to promote the mitochondrial pathway of apoptosis' region; an α-helix

Full MDM2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Accelerated tumor formation, susceptibility to — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

MDM2 c.523+5A>G Uncertain significance ★★ same condition
MDM2 p.Arg332His Uncertain significance ★★ same condition
MDM2 p.Asn117Ser Uncertain significance ★★ ⚠ same condition
MDM2 p.Asn374Ser Uncertain significance ★★ ⚠ same condition
MDM2 p.Gln414Leu Uncertain significance ★★ ⚠ same condition
MDM2 p.Glu273Ala Uncertain significance ★★ ⚠ same condition
MDM2 p.Gly341Glu Uncertain significance ★★ ⚠ same condition
MDM2 p.Ser122Leu 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/mdm2-p-val81 (accessed [today's date]).

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