Is ANK1 p.Arg1476Leu (c.4427G>T) pathogenic?

ANK1 p.Arg1476Leu (c.4427G>T) is classified Uncertain significance in ANK1 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-11-20). AlphaMissense: likely pathogenic (0.8286); Ultra-rare (popmax 0.0107%, afr); Associated with hereditary spherocytosis type 1.

What condition is associated with ANK1 p.Arg1476Leu (c.4427G>T)?

ANK1 p.Arg1476Leu (c.4427G>T) is associated with hereditary spherocytosis type 1 (ClinVar).

How common is ANK1 p.Arg1476Leu (c.4427G>T) in the general population?

ANK1 p.Arg1476Leu (c.4427G>T) is ultra-rare (popmax 0.0107%, afr) (gnomAD).

How is Hereditary spherocytosis inherited?

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

What do computational predictors say about ANK1 p.Arg1476Leu (c.4427G>T)?

AlphaMissense predicts likely pathogenic (score 0.8286) — an in-silico prediction, not a clinical call.

ANK1 p.Arg1476Leu

c.4427G>T · rs557897612 · VCV2439070

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.8286 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0107%, afr)

Missense predictors

2/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

hereditary spherocytosis type 1

Computational evidence

Protein change
AlphaMissense	0.8286	likely pathogenic
REVEL	0.809	moderately pathogenic-leaning
SaProt	LLR -10.00	tolerated
⇒ AlphaMissense and REVEL call this damaging; SaProt does not.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.6	GERP 1.7, phastCons 1
Regional constraint	o/e 0.93	unconstrained · MANE · 23 kb · p 0.11 · regional, not allelic
Overall
CADD	23.9	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 0.0107% African / African-American · 8/74,904 alleles

Filtering AF 0.00528% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00381%

Overall 0.00062% 10/1,613,694 alleles · ultra-rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.0107%	9,363
Admixed American	0.00333%	30,003

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: ANK1
Protein: p.Arg1476Leu
Coding: c.4427G>T
MANE Select: NM_000037
dbSNP: rs557897612
Type: single nucleotide variant
Location: chr8:41684654 (GRCh38)
Gene constraint: LOEUF 0.299 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 69.64 · 21 PDB
Residue 1476: the death domain; the '55 kda regulatory domain' region

Full ANK1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

hereditary spherocytosis type 1 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Hereditary spherocytosis (Orphanet):

Inheritance: Autosomal dominant, Autosomal recessive
Onset: All ages
Prevalence: 1-5 / 10 000 (Germany)

Similar variants

ANK1 p.Arg1476Cys Uncertain significance ★ ⚠ same residue
ANK1 c.1305+1G>A Pathogenic ★★ same condition
ANK1 c.1405-9G>A Pathogenic/Likely pathogenic ★★ same condition
ANK1 c.1702-2A>G Pathogenic/Likely pathogenic ★★ same condition
ANK1 c.1801-17G>A Pathogenic/Likely pathogenic ★★ same condition
ANK1 c.2296-1G>A Likely pathogenic ★★ same condition
ANK1 c.2296-2A>G Pathogenic/Likely pathogenic ★★ same condition
ANK1 c.2389-2A>G 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/ank1-p-arg1476leu (accessed [today's date]).

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