Is LDLR p.Asp477fs (c.1428dup) pathogenic?

LDLR p.Asp477fs (c.1428dup) is classified Pathogenic in LDLR (ClinVar, Multiple submitters, 5 submitters; last evaluated 2025-04-04). No gnomAD frequency available for this variant; Associated with homozygous familial hypercholesterolemia.

What condition is associated with LDLR p.Asp477fs (c.1428dup)?

LDLR p.Asp477fs (c.1428dup) is associated with homozygous familial hypercholesterolemia, familial hypercholesterolemia, hypercholesterolemia, familial, 1 (ClinVar).

How common is LDLR p.Asp477fs (c.1428dup) in the general population?

LDLR p.Asp477fs (c.1428dup) is no gnomAD frequency available for this variant (gnomAD).

How is Homozygous familial hypercholesterolemia inherited?

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

LDLR p.Asp477fs

c.1428dup · rs876657697 · VCV228357

Pathogenic Multiple submitters

Classification

Pathogenic

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 5 submitters

Consequence

frameshift

predicted LoF

gnomAD v4.1

Not reported

no gnomAD frequency available for this variant

Conditions

homozygous familial hypercholesterolemia

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Consequence	frameshift	predicted loss-of-function in a haploinsufficient gene (ClinGen)
NMD	predicted	premature termination codon in exon 10 of 18
Splicing
SpliceAI	—	not assessed · substitutions only
Constraint at this position
Conservation	phyloP 9.7	GERP -0.34, phastCons 1

Predicted loss-of-function is descriptive, not an applied PVS1 code.

Population frequency

dbSNP / gnomAD

No gnomAD frequency available for this variant. This is missing data, not an absence: the variant may or may not be present in gnomAD. Rarity (ACMG PM2) and BA1/BS1 cannot be assessed for it.

Variant & gene context

Gene: LDLR
Protein: p.Asp477fs
Coding: c.1428dup
MANE Select: NM_000527
dbSNP: rs876657697
Type: Duplication
Location: chr19:11113599 (GRCh38)
Gene constraint: LOEUF 1.091 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 75.81 · 36 PDB

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

Disease context

homozygous familial hypercholesterolemia — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: familial hypercholesterolemia hypercholesterolemia, familial, 1

For Homozygous familial hypercholesterolemia (Orphanet):

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

Similar variants

LDLR p.Asp477Asn Uncertain significance ★★★ ⚠ same residue
LDLR p.Asp477Glu Uncertain significance ★★★ ⚠ same residue
LDLR p.Asp477= Likely benign ★★ same residue
LDLR p.Glu763fs Likely pathogenic ★★★ same condition
LDLR p.Cys803_Leu808dup Uncertain significance ★★★ same condition
LDLR c.313+1dup Pathogenic/Likely pathogenic ★★ same condition
LDLR c.313+2dup Pathogenic/Likely pathogenic ★★ same condition
LDLR c.314-446_1187-386dup Pathogenic/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/ldlr-p-asp477fs (accessed [today's date]).

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