Is ANK3 p.Arg211Ter (c.631C>T) pathogenic?

ANK3 p.Arg211Ter (c.631C>T) is classified Conflicting classifications of pathogenicity in ANK3 (ClinVar, Conflicting submitters, 2 submitters; last evaluated 2023-06-28). Absent from gnomAD v4.1; Associated with intellectual disability-hypotonia-spasticity-sleep disorder syndrome.

What condition is associated with ANK3 p.Arg211Ter (c.631C>T)?

ANK3 p.Arg211Ter (c.631C>T) is associated with intellectual disability-hypotonia-spasticity-sleep disorder syndrome (ClinVar).

How common is ANK3 p.Arg211Ter (c.631C>T) in the general population?

ANK3 p.Arg211Ter (c.631C>T) is absent from gnomAD v4.1 (gnomAD).

ANK3 p.Arg211Ter

Q: How is ANK3-related intellectual disability-sleep disturbance syndrome inherited?

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

c.631C>T · rs2132649260 · VCV2430260

Conflicting classifications of pathogenicity Conflicting submitters

Classification

Conflicting classifications of pathogenicity

ClinVar

Review

Conflicting submitters ★☆☆☆

ClinVar · 2 submitters

Consequence

nonsense (stop-gain)

predicted LoF

gnomAD v4.1

Absent

absent from gnomAD v4.1

Conditions

intellectual disability-hypotonia-spasticity-sleep disorder syndrome

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Consequence	nonsense (stop-gain)	predicted loss-of-function in a LoF-intolerant gene
NMD	predicted	premature termination codon in exon 6 of 44
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 4.5	GERP 1.7, phastCons 1
Overall
CADD	37.0	PHRED · no single calibrated threshold — expert panels disagree

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

Population frequency

gnomAD v4.1 · exomes + genomes

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: ANK3
Protein: p.Arg211Ter
Coding: c.631C>T
MANE Select: NM_020987
dbSNP: rs2132649260
Type: single nucleotide variant
Location: chr10:60263903 (GRCh38)
Gene constraint: LOEUF 0.16 · pLI 1.00 (gnomAD)

Full ANK3 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

intellectual disability-hypotonia-spasticity-sleep disorder syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For ANK3-related intellectual disability-sleep disturbance syndrome (Orphanet):

Inheritance: Autosomal recessive
Onset: Childhood

Similar variants

ANK3 p.Arg211Gln Uncertain significance ★ same residue
ANK3 p.Ala1630Val Uncertain significance ★★ ⚠ same condition
ANK3 p.Ala2023Thr Uncertain significance ★★ ⚠ same condition
ANK3 p.Ala628Thr Uncertain significance ★★ same condition
ANK3 p.Arg1243His Uncertain significance ★★ ⚠ same condition
ANK3 p.Arg1575Trp Uncertain significance ★★ same condition
ANK3 p.Arg2239Cys Uncertain significance ★★ ⚠ same condition
ANK3 p.Arg852His 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/ank3-p-arg211ter (accessed [today's date]).

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