LDLR p.Pro519Ser
c.1555C>T · rs875989923 · VCV251896
ClinGen expert panel — Familial Hypercholesterolemia VCEP
Uncertain Significance for hypercholesterolemia, familial. Applied ACMG criteria (verbatim):
PM2 PS4_Supporting PP3 PP4
Curation rationale (ClinGen, verbatim)
The NM_000527.5(LDLR):c.1555C>T (p.Pro519Ser) variant is classified as Uncertain significance - insufficient evidence for Familial Hypercholesterolemia by applying ACMG/AMP evidence codes PM2, PP3, PP4 and PS4_Supporting as defined by the ClinGen Familial Hypercholesterolemia Expert Panel LDLR-specific variant curation guidelines (specification version 1.2) on 4 March 2025. The supporting evidence is as follows: PM2: This variant is absent from gnomAD v4.1.0. PP3: REVEL = 0.864. PS4_Supporting, PP4: Variant meets PM2 and is identified in at least 3 unrelated index cases who fulfill criteria for FH from different labs (1 case with possible FH by Simon Broome criteria from Centre de Génétique Moléculaire et Chromosomique, Unité de génétique de l'Obésité et des Dyslipidémies (APHP.Sorbonne Université, Hôpital de la Pitié-Salpêtrière), France; 2 cases with definite FH by Simon Broome criteria from PMID 35047021 (Rimbert et al., 2022)).
ClinGen Evidence Repository → · reported verbatim, not re-tallied by Sugi Variant.
Computational evidence
| Protein change | ||
| AlphaMissense | 0.8514 | likely pathogenic |
|---|---|---|
| REVEL | 0.864 | moderately pathogenic-leaning |
| SaProt | LLR -11.99 | damaging |
| ⇒ AlphaMissense, REVEL and SaProt all call this damaging. | ||
| Splicing | ||
| SpliceAI | — | not assessed · no allele here is in the release |
| Constraint at this position | ||
| Conservation | phyloP 5.8 | GERP 0.37, phastCons 1 |
| Regional constraint | o/e 1.00 | unconstrained · MANE · 42 kb · p 0.91 · regional, not allelic |
| Overall | ||
| CADD | 27.1 | PHRED · no single calibrated threshold — expert panels disagree |
ClinVar classifies this uncertain; the computational predictors unanimously lean damaging — a triage signal, not a reclassification
AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.
Population frequency
Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.
Variant & gene context
- Gene
- LDLR
- Protein
- p.Pro519Ser
- Coding
- c.1555C>T
- MANE Select
- NM_000527
- dbSNP
- rs875989923
- Type
- single nucleotide variant
- Location
- chr19:11113731 (GRCh38)
- Gene constraint
- LOEUF 1.091 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
- Structure
- AlphaFold pLDDT 75.81 · 36 PDB
- Residue 519
- a β-strand
Similar variants
- LDLR p.Pro519Thr Uncertain significance ★★★ ⚠ same residue
- LDLR c.1186+5G>A Likely pathogenic ★★★ same condition
- LDLR c.1359-1G>A Pathogenic ★★★ same condition
- LDLR c.1359-5C>G Likely pathogenic ★★★ same condition
- LDLR c.1705+2T>C Likely pathogenic ★★★ same condition
- LDLR c.190+4A>T Likely pathogenic ★★★ same condition
- LDLR c.2140+1G>A Pathogenic ★★★ same condition
- LDLR c.2389+2T>G 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-pro519ser (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown