Is USH2A p.Pro433= (c.1299T>C) pathogenic?

USH2A p.Pro433= (c.1299T>C) is classified Likely benign in USH2A (ClinVar, Multiple submitters, 3 submitters; last evaluated 2023-11-04). Very rare (popmax 0.0011%, sas); Associated with retinitis pigmentosa 39.

What condition is associated with USH2A p.Pro433= (c.1299T>C)?

USH2A p.Pro433= (c.1299T>C) is associated with retinitis pigmentosa 39, Usher syndrome type 2A (ClinVar).

How common is USH2A p.Pro433= (c.1299T>C) in the general population?

USH2A p.Pro433= (c.1299T>C) is very rare (popmax 0.0011%, sas) (gnomAD).

How is Retinitis pigmentosa inherited?

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

USH2A p.Pro433=

c.1299T>C · rs1571702060 · VCV667183

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 3 submitters

gnomAD v4.1

Rare

very rare (popmax 0.0011%, sas)

Conditions

retinitis pigmentosa 39

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 0.13	GERP -3.1, phastCons 0.13
Overall
CADD	8.211	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0011% South Asian · 1/91,030 alleles

Overall 6.85e-05% 1/1,460,904 alleles · very rare

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: USH2A
Protein: p.Pro433=
Coding: c.1299T>C
MANE Select: NM_206933
dbSNP: rs1571702060
Type: single nucleotide variant
Location: chr1:216324197 (GRCh38)
Gene constraint: LOEUF 0.855 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Residue 433: the laminin n-terminal domain

Full USH2A gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

retinitis pigmentosa 39 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: Usher syndrome type 2A

For Retinitis pigmentosa (Orphanet):

Inheritance: Autosomal dominant, Autosomal recessive, Mitochondrial inheritance
Onset: Adolescent, Adult, Childhood
Prevalence: 1-5 / 10 000 (Europe)

Similar variants

USH2A p.Pro433Ser Uncertain significance ★ ⚠ same residue
USH2A p.Pro433His Uncertain significance ★ ⚠ same residue
USH2A p.Pro433Thr Uncertain significance ★ ⚠ same residue
USH2A c.12295-3T>A Pathogenic ★★★ same condition
USH2A c.8559-2A>G Pathogenic ★★★ same condition
USH2A c.8682-9A>G Pathogenic ★★★ same condition
USH2A p.Ala4740Asp Pathogenic ★★★ ⚠ same condition
USH2A p.Arg3905Cys 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/ush2a-p-pro433 (accessed [today's date]).

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