Is NHS p.Pro189= (c.567C>T) pathogenic?

NHS p.Pro189= (c.567C>T) is classified Likely benign in NHS (ClinVar, Single submitter, 1 submitter; last evaluated 2023-02-10). Very rare (popmax 0.00536%, nfe); Associated with Nance-Horan syndrome.

What condition is associated with NHS p.Pro189= (c.567C>T)?

NHS p.Pro189= (c.567C>T) is associated with Nance-Horan syndrome (ClinVar).

How common is NHS p.Pro189= (c.567C>T) in the general population?

NHS p.Pro189= (c.567C>T) is very rare (popmax 0.00536%, nfe) (gnomAD).

NHS p.Pro189=

c.567C>T · rs972522687 · VCV2893442

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00536%, nfe)

Conditions

Nance-Horan syndrome

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>A here scores Δ0.76 · evaluated, not missing
Constraint at this position
Conservation	phyloP -8	GERP -3.8
Overall
CADD	0.111	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00536% European (non-Finnish) · 48/895,479 alleles

Filtering AF 0.00415% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00367%

Overall 0.00413% 50/1,211,914 alleles · very rare exomes 50/1,098,145 · genomes 0/113,769 · joint denominator

Ancestry group	Frequency	1 in
European (non-Finnish)grpmax	0.00536%	18,656
Remaining individualsnot grpmax-eligible	0.0042%	23,828

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: NHS
Protein: p.Pro189=
Coding: c.567C>T
MANE Select: NM_001291867
dbSNP: rs972522687
Type: single nucleotide variant
Location: chrX:17687743 (GRCh38)
Structure: AlphaFold pLDDT 43.65
Residue 189: the 'wave homology domain (whd)' region

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

Disease context

Nance-Horan syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

NHS p.Arg248Ter Pathogenic ★★ same condition
NHS p.Arg394Ter Pathogenic ★★ same condition
NHS p.Arg900Ter Pathogenic ★★ same condition
NHS p.Gln411Ter Pathogenic ★★ same condition
NHS p.Gln80Ter Pathogenic/Likely pathogenic ★★ same condition
NHS p.Ala564Val Uncertain significance ★★ same condition
NHS p.Ala745Val Uncertain significance ★★ same condition
NHS p.Arg162Cys 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/nhs-p-pro189 (accessed [today's date]).

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