Is RELN p.Ile2128= (c.6384C>T) pathogenic?

RELN p.Ile2128= (c.6384C>T) is classified Likely benign in RELN (ClinVar, Multiple submitters, 2 submitters; last evaluated 2025-04-10). Ultra-rare (popmax 0.016%, afr); Associated with Norman-Roberts syndrome.

What condition is associated with RELN p.Ile2128= (c.6384C>T)?

RELN p.Ile2128= (c.6384C>T) is associated with Norman-Roberts syndrome, familial temporal lobe epilepsy 7 (ClinVar).

How common is RELN p.Ile2128= (c.6384C>T) in the general population?

RELN p.Ile2128= (c.6384C>T) is ultra-rare (popmax 0.016%, afr) (gnomAD).

RELN p.Ile2128=

c.6384C>T · rs762802659 · VCV1158123

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.016%, afr)

Conditions

Norman-Roberts syndrome

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 -1.7	GERP -4.2
Overall
CADD	3.468	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.016% African / African-American · 12/74,886 alleles

Filtering AF 0.00922% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00722%

Overall 0.00428% 69/1,613,620 alleles · ultra-rare exomes 57/1,461,488 · genomes 12/152,132 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.016%	6,240
European (non-Finnish)	0.00449%	22,258
Remaining individualsnot grpmax-eligible	0.0032%	31,234
East Asian	0.00223%	44,876
Admixed American	0.00167%	59,996

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: RELN
Protein: p.Ile2128=
Coding: c.6384C>T
MANE Select: NM_005045
dbSNP: rs762802659
Type: single nucleotide variant
Location: chr7:103545263 (GRCh38)
Gene constraint: LOEUF 0.276 · pLI 1.00 · ClinGen HI 0/3 (gnomAD)
Residue 2128: the egf-like 5 domain

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

Disease context

Norman-Roberts syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: familial temporal lobe epilepsy 7

Similar variants

RELN p.Ile2128Val Likely benign ★ same residue
RELN p.Ile2128Phe Uncertain significance ★ same residue
RELN c.3912+2T>G Likely pathogenic ★★ same condition
RELN c.7349+2T>C Likely pathogenic ★★ same condition
RELN p.Arg1622Ter Pathogenic/Likely pathogenic ★★ same condition
RELN c.1893-3C>T Uncertain significance ★★ same condition
RELN c.227-3C>T Uncertain significance ★★ same condition
RELN c.2465+5G>T Uncertain significance ★★ 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/reln-p-ile2128 (accessed [today's date]).

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