Is AMPD3 p.Ser136= (c.408C>T) pathogenic?

AMPD3 p.Ser136= (c.408C>T) is classified Uncertain significance in AMPD3 (ClinVar, Single submitter, 1 submitter; last evaluated 2018-01-12). Rare (popmax 0.363%, eas); Associated with Erythrocyte AMP deaminase deficiency.

What condition is associated with AMPD3 p.Ser136= (c.408C>T)?

AMPD3 p.Ser136= (c.408C>T) is associated with Erythrocyte AMP deaminase deficiency (ClinVar).

How common is AMPD3 p.Ser136= (c.408C>T) in the general population?

AMPD3 p.Ser136= (c.408C>T) is rare (popmax 0.363%, eas) (gnomAD).

AMPD3 p.Ser136=

c.408C>T · rs542609298 · VCV302152

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

rare (popmax 0.363%, eas)

Conditions

Erythrocyte AMP deaminase deficiency

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	<0.2	all four deltas below 0.2 · C>G here scores Δ0.28 · evaluated, not missing
Constraint at this position
Conservation	phyloP -1.9	GERP -3
Overall
CADD	6.235	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.363% East Asian · 163/44,880 alleles

Filtering AF 0.318% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.3%

Overall 0.0185% 298/1,613,310 alleles · rare

Ancestry group	Frequency	1 in
East Asiangrpmax	0.363%	275
Remaining individualsnot grpmax-eligible	0.0224%	4,465
South Asian	0.0165%	6,072
Admixed American	0.01%	10,003
African / African-American	0.00933%	10,721
European (non-Finnish)	0.00788%	12,689

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: AMPD3
Protein: p.Ser136=
Coding: c.408C>T
MANE Select: NM_001025389
dbSNP: rs542609298
Type: single nucleotide variant
Location: chr11:10478712 (GRCh38)
Gene constraint: LOEUF 0.817 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 85.74

Full AMPD3 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Erythrocyte AMP deaminase deficiency — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

AMPD3 c.1135-5C>A Uncertain significance ★★ same condition
AMPD3 c.1135-6C>G Uncertain significance ★★ same condition
AMPD3 c.1267-3C>T Uncertain significance ★★ same condition
AMPD3 c.*287T>C Uncertain significance ★★ same condition
AMPD3 c.*75C>T Uncertain significance ★★ same condition
AMPD3 p.Ala141= Uncertain significance ★★ same condition
AMPD3 p.Arg426Trp Uncertain significance ★★ ⚠ same condition
AMPD3 p.Arg576= 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/ampd3-p-ser136 (accessed [today's date]).

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