Is DONSON p.Ser34Phe (c.101C>T) pathogenic?

DONSON p.Ser34Phe (c.101C>T) is classified Uncertain significance in DONSON (ClinVar, Single submitter, 1 submitter; last evaluated 2021-11-15). AlphaMissense: likely benign (0.1119); Very rare (popmax 0.00626%, sas); Associated with Inborn genetic diseases.

What condition is associated with DONSON p.Ser34Phe (c.101C>T)?

DONSON p.Ser34Phe (c.101C>T) is associated with Inborn genetic diseases (ClinVar).

How common is DONSON p.Ser34Phe (c.101C>T) in the general population?

DONSON p.Ser34Phe (c.101C>T) is very rare (popmax 0.00626%, sas) (gnomAD).

What do computational predictors say about DONSON p.Ser34Phe (c.101C>T)?

AlphaMissense predicts likely benign (score 0.1119) — an in-silico prediction, not a clinical call.

DONSON p.Ser34Phe

c.101C>T · rs2086609499 · VCV2261237

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1119 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00626%, sas)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.1119	likely benign
REVEL	0.025	moderately benign-leaning
SaProt	LLR -9.95	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 0.52	GERP 0.73
Regional constraint	o/e 1.00	unconstrained · MANE · 10 kb · p 0.95 · regional, not allelic
Overall
CADD	13.53	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00626% South Asian · 2/31,938 alleles

Filtering AF 0.00104% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000388%

Overall 0.000819% 9/1,098,912 alleles · very rare

Ancestry group	Frequency	1 in
South Asiangrpmax	0.00626%	15,969
European (non-Finnish)	0.000701%	142,601

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: DONSON
Protein: p.Ser34Phe
Coding: c.101C>T
MANE Select: NM_017613
dbSNP: rs2086609499
Type: single nucleotide variant
Location: chr21:33588541 (GRCh38)
Gene constraint: LOEUF 0.918 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 72.94
Residue 34: the 'disordered' region; a modified residue (phosphoserine)

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

Disease context

Inborn genetic diseases — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

DONSON p.Arg442Ter Pathogenic ★★ same condition
DONSON p.Gln428Ter Pathogenic/Likely pathogenic ★★ same condition
DONSON p.Ala32Gly Uncertain significance ★★ ⚠ same condition
DONSON p.Ala429Glu Uncertain significance ★★ ⚠ same condition
DONSON p.Arg162Gln Uncertain significance ★★ ⚠ same condition
DONSON p.Arg234His Uncertain significance ★★ ⚠ same condition
DONSON p.Arg239Ser Uncertain significance ★★ ⚠ same condition
DONSON p.Arg29Cys 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/donson-p-ser34phe (accessed [today's date]).

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