Is DNAH8 p.Arg452Ser (c.1356A>T) pathogenic?

DNAH8 p.Arg452Ser (c.1356A>T) is classified Uncertain significance in DNAH8 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2025-04-08). AlphaMissense: likely pathogenic (0.8659); Ultra-rare (popmax 0.0988%, mid); Associated with primary ciliary dyskinesia.

What condition is associated with DNAH8 p.Arg452Ser (c.1356A>T)?

DNAH8 p.Arg452Ser (c.1356A>T) is associated with primary ciliary dyskinesia (ClinVar).

How common is DNAH8 p.Arg452Ser (c.1356A>T) in the general population?

DNAH8 p.Arg452Ser (c.1356A>T) is ultra-rare (popmax 0.0988%, mid) (gnomAD).

How is Primary ciliary dyskinesia inherited?

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

What do computational predictors say about DNAH8 p.Arg452Ser (c.1356A>T)?

AlphaMissense predicts likely pathogenic (score 0.8659) — an in-silico prediction, not a clinical call.

DNAH8 p.Arg452Ser

c.1356A>T · rs943639840 · VCV454550

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

likely pathogenic

0.8659 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0988%, mid)

Missense predictors

1/2 damaging

AlphaMissense, REVEL

Conditions

primary ciliary dyskinesia

Computational evidence

Protein change
AlphaMissense	0.8659	likely pathogenic
REVEL	0.197	benign-leaning
⇒ AlphaMissense calls this damaging; REVEL does not.
Splicing
SpliceAI	<0.2	all four deltas below 0.2 · A>G here scores Δ0.60 · evaluated, not missing
Constraint at this position
Conservation	phyloP 1.6	GERP 0.59, phastCons 1
Regional constraint	o/e 0.92	unconstrained · MANE · 131 kb · p 0.0001 · regional, not allelic
Overall
CADD	18.07	PHRED · no single calibrated threshold — expert panels disagree

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

⚠ Isoform check: AlphaMissense numbered on a different transcript (AM R235S vs ClinVar R452S) — verify the residue.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0988% Middle Eastern · 6/6,074 alleles

Filtering AF 0.0429% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0293%

Overall 0.00217% 35/1,612,010 alleles · ultra-rare

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.0988%	1,012
Remaining individualsnot grpmax-eligible	0.00641%	15,602
African / African-American	0.00267%	37,420
European (non-Finnish)	0.00187%	53,593
Finnishnot grpmax-eligible	0.00156%	63,986

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: DNAH8
Protein: p.Arg452Ser
Coding: c.1356A>T
MANE Select: NM_001206927
dbSNP: rs943639840
Type: single nucleotide variant
Location: chr6:38750538 (GRCh38)
Gene constraint: LOEUF 0.692 · pLI <0.01 (gnomAD)

Full DNAH8 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

primary ciliary dyskinesia — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Primary ciliary dyskinesia (Orphanet):

Inheritance: Autosomal dominant, Autosomal recessive, X-linked recessive
Onset: Neonatal
Prevalence: 1-5 / 10 000 (Pakistan)

Similar variants

DNAH8 c.10963-1G>A Likely pathogenic ★★ same condition
DNAH8 c.11563+1G>T Likely pathogenic ★★ same condition
DNAH8 c.2664+2T>C Likely pathogenic ★★ same condition
DNAH8 c.5734-1G>T Likely pathogenic ★★ same condition
DNAH8 p.Arg1090Ter Pathogenic/Likely pathogenic ★★ same condition
DNAH8 p.Arg207Ter Pathogenic/Likely pathogenic ★★ same condition
DNAH8 p.Arg2878Ter Pathogenic ★★ same condition
DNAH8 p.Arg4166Ter Pathogenic/Likely pathogenic ★★ 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/dnah8-p-arg452ser (accessed [today's date]).

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