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CLN3 p.Val277=

c.831G>A · rs1142183 · VCV136780

Conflicting classifications of pathogenicity Conflicting submitters
Classification
Conflicting classifications of pathogenicity
ClinVar
Review
Conflicting submitters ★☆☆☆
ClinVar · 13 submitters
gnomAD v4.1
Rare
ultra-rare (popmax 0.0992%, nfe)
Conditions
3
Inborn genetic diseases

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
ConservationphyloP 0.11GERP -0.52, phastCons 0.94
Overall
CADD7.729PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes
Grpmax group 0.0992% European (non-Finnish) · 1,171/1,180,062 alleles
Filtering AF 0.0945% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0926%
Overall 0.0752% 1,213/1,614,088 alleles · ultra-rare
Ancestry group Frequency 1 in
European (non-Finnish)grpmax 0.0992% 1,008
Remaining individualsnot grpmax-eligible 0.032% 3,124
Finnishnot grpmax-eligible 0.0172% 5,821
Admixed American 0.00833% 12,000
African / African-American 0.00801% 12,487

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
CLN3
Protein
p.Val277=
Coding
c.831G>A
MANE Select
NM_001042432
dbSNP
rs1142183
Type
single nucleotide variant
Location
chr16:28482632 (GRCh38)
Gene constraint
LOEUF 1.022 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure
AlphaFold pLDDT 81.81
Full CLN3 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

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/cln3-p-val277 (accessed [today's date]).

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