Is DTHD1 p.Ser544= (c.1632G>A) pathogenic?

DTHD1 p.Ser544= (c.1632G>A) is classified Likely benign in DTHD1 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-12-08). Ultra-rare (popmax 0.012%, amr).

How common is DTHD1 p.Ser544= (c.1632G>A) in the general population?

DTHD1 p.Ser544= (c.1632G>A) is ultra-rare (popmax 0.012%, amr) (gnomAD).

DTHD1 p.Ser544=

c.1632G>A · rs374555683 · VCV1595988

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

ultra-rare (popmax 0.012%, amr)

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 -0.93	GERP -4.5
Overall
CADD	1.454	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.012% Admixed American · 6/50,052 alleles

Filtering AF 0.00519% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00352%

Overall 0.00124% 19/1,534,134 alleles · ultra-rare exomes 18/1,381,990 · genomes 1/152,144 · joint denominator

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.012%	8,342
South Asian	0.00607%	16,466
Remaining individualsnot grpmax-eligible	0.00169%	59,230
European (non-Finnish)	0.000617%	162,150

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: DTHD1
Protein: p.Ser544=
Coding: c.1632G>A
MANE Select: NM_001170700
dbSNP: rs374555683
Type: single nucleotide variant
Location: chr4:36295028 (GRCh38)
Gene constraint: LOEUF 1.034 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 69.99

Full DTHD1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

DTHD1 p.Ser544Leu Uncertain significance ★ ⚠ same residue
DTHD1 c.1218+1G>A Uncertain significance ★★ same type
DTHD1 c.1219-2A>G Uncertain significance ★★ same type
DTHD1 p.Ala552Ser Uncertain significance ★★ ⚠ same type
DTHD1 p.Ala811Asp Uncertain significance ★★ ⚠ same type
DTHD1 p.Arg326Gln Uncertain significance ★★ ⚠ same type
DTHD1 p.Arg371Cys Uncertain significance ★★ ⚠ same type
DTHD1 p.Arg447Gln Uncertain significance ★★ ⚠ same type

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/dthd1-p-ser544 (accessed [today's date]).

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