Is CRB1 p.Pro89Ser (c.265C>T) pathogenic?

CRB1 p.Pro89Ser (c.265C>T) is classified Conflicting classifications of pathogenicity in CRB1 (ClinVar, Conflicting submitters, 4 submitters; last evaluated 2024-08-07). AlphaMissense: likely benign (0.071); Very rare (popmax 0.00178%, nfe); Associated with Leber congenital amaurosis 8.

What condition is associated with CRB1 p.Pro89Ser (c.265C>T)?

CRB1 p.Pro89Ser (c.265C>T) is associated with Leber congenital amaurosis 8, pigmented paravenous retinochoroidal atrophy, retinitis pigmentosa 12 (ClinVar).

How common is CRB1 p.Pro89Ser (c.265C>T) in the general population?

CRB1 p.Pro89Ser (c.265C>T) is very rare (popmax 0.00178%, nfe) (gnomAD).

How is Leber congenital amaurosis inherited?

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

What do computational predictors say about CRB1 p.Pro89Ser (c.265C>T)?

AlphaMissense predicts likely benign (score 0.071) — an in-silico prediction, not a clinical call.

CRB1 p.Pro89Ser

c.265C>T · rs145525029 · VCV876296

Conflicting classifications of pathogenicity Conflicting submitters

Classification

Conflicting classifications of pathogenicity

ClinVar

Review

Conflicting submitters ★☆☆☆

ClinVar · 4 submitters

AlphaMissense

likely benign

0.071 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00178%, nfe)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Leber congenital amaurosis 8

Computational evidence

Protein change
AlphaMissense	0.071	likely benign
REVEL	0.289	benign-leaning
SaProt	LLR -5.54	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 0.38	GERP -1.4
Regional constraint	o/e 1.01	unconstrained · MANE · 209 kb · p 0.78 · regional, not allelic
Overall
CADD	4.435	PHRED · no single calibrated threshold — expert panels disagree

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

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00178% European (non-Finnish) · 21/1,180,032 alleles

Filtering AF 0.00114% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000971%

Overall 0.00149% 24/1,614,058 alleles · very rare

Ancestry group	Frequency	1 in
European (non-Finnish)grpmax	0.00178%	56,192
Remaining individualsnot grpmax-eligible	0.0016%	62,486
Finnishnot grpmax-eligible	0.00156%	64,034
African / African-American	0.00133%	74,924

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: CRB1
Protein: p.Pro89Ser
Coding: c.265C>T
MANE Select: NM_201253
dbSNP: rs145525029
Type: single nucleotide variant
Location: chr1:197328616 (GRCh38)
Gene constraint: LOEUF 0.776 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 75.19 · 1 PDB
Residue 89: a disulfide bond; the egf-like 2 domain

Full CRB1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Leber congenital amaurosis 8 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: pigmented paravenous retinochoroidal atrophy retinitis pigmentosa 12 retinitis pigmentosa

For Leber congenital amaurosis (Orphanet):

Inheritance: Autosomal dominant, Autosomal recessive
Onset: Infancy, Neonatal
Prevalence: 1-9 / 100 000 (Europe)

Similar variants

CRB1 c.1172-2A>G Likely pathogenic ★★ same condition
CRB1 c.2128+1G>C Pathogenic/Likely pathogenic ★★ same condition
CRB1 c.2129-1G>A Pathogenic/Likely pathogenic ★★ same condition
CRB1 c.2129-1G>C Pathogenic ★★ same condition
CRB1 c.2129-2A>G Pathogenic ★★ same condition
CRB1 c.2676+1G>A Likely pathogenic ★★ same condition
CRB1 c.2842+5G>A Pathogenic/Likely pathogenic ★★ same condition
CRB1 c.2843-1G>T 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/crb1-p-pro89ser (accessed [today's date]).

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