Is DNAH2 p.Arg1978Cys (c.5932C>T) pathogenic?

DNAH2 p.Arg1978Cys (c.5932C>T) is classified Uncertain significance in DNAH2 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-04-09). AlphaMissense: likely pathogenic (0.9145); Very rare (popmax 0.00329%, sas); Associated with Inborn genetic diseases.

What condition is associated with DNAH2 p.Arg1978Cys (c.5932C>T)?

DNAH2 p.Arg1978Cys (c.5932C>T) is associated with Inborn genetic diseases (ClinVar).

How common is DNAH2 p.Arg1978Cys (c.5932C>T) in the general population?

DNAH2 p.Arg1978Cys (c.5932C>T) is very rare (popmax 0.00329%, sas) (gnomAD).

What do computational predictors say about DNAH2 p.Arg1978Cys (c.5932C>T)?

AlphaMissense predicts likely pathogenic (score 0.9145) — an in-silico prediction, not a clinical call.

DNAH2 p.Arg1978Cys

c.5932C>T · VCV3272772

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.9145 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00329%, sas)

Missense predictors

2/2 damaging

AlphaMissense, REVEL

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.9145	likely pathogenic · top 10% in DNAH2
REVEL	0.649	pathogenic-leaning
⇒ AlphaMissense and REVEL both call this damaging.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.7	GERP 1.7, phastCons 1
Regional constraint	o/e 0.88	unconstrained · MANE · 73 kb · p 9.6e-12 · regional, not allelic
Overall
CADD	33.0	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean damaging — 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 0.00329% South Asian · 3/91,092 alleles

Filtering AF 0.000875% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000605%

Overall 0.0013% 21/1,614,106 alleles · very rare

Ancestry group	Frequency	1 in
South Asiangrpmax	0.00329%	30,364
Remaining individualsnot grpmax-eligible	0.0032%	31,243
African / African-American	0.00133%	74,950
European (non-Finnish)	0.00127%	78,670

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: DNAH2
Protein: p.Arg1978Cys
Coding: c.5932C>T
MANE Select: NM_020877
Type: single nucleotide variant
Location: chr17:7780711 (GRCh38)
Gene constraint: LOEUF 0.655 · pLI <0.01 (gnomAD)
Residue 1978: the 'aaa 1' region

Full DNAH2 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

DNAH2 p.Arg1978His Uncertain significance ★ ⚠ same residue
DNAH2 p.Ala1036Val Uncertain significance ★★ ⚠ same condition
DNAH2 p.Arg1533Cys Uncertain significance ★★ ⚠ same condition
DNAH2 p.Arg2538Gln Uncertain significance ★★ same condition
DNAH2 p.Arg3759His Uncertain significance ★★ ⚠ same condition
DNAH2 p.Gln2069Glu Uncertain significance ★★ same condition
DNAH2 p.Ile4043Ser Uncertain significance ★★ ⚠ same condition
DNAH2 p.Pro3819Leu 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/dnah2-p-arg1978cys (accessed [today's date]).

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