Is MSN p.Ile20= (c.60C>T) pathogenic?

MSN p.Ile20= (c.60C>T) is classified Likely benign in MSN (ClinVar, Single submitter, 1 submitter; last evaluated 2022-09-21). Very rare (popmax 8.26e-05%).

How common is MSN p.Ile20= (c.60C>T) in the general population?

MSN p.Ile20= (c.60C>T) is very rare (popmax 8.26e-05%) (gnomAD).

MSN p.Ile20=

c.60C>T · rs2522976709 · VCV1928426

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 8.26e-05%)

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 0.55	GERP 0.051, phastCons 1
Overall
CADD	7.638	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 8.26e-05%

Overall 8.26e-05% 1/1,210,711 alleles · very rare exomes 1/1,098,008 · genomes 0/112,703 · joint denominator

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: MSN
Protein: p.Ile20=
Coding: c.60C>T
MANE Select: NM_002444
dbSNP: rs2522976709
Type: single nucleotide variant
Location: chrX:65716865 (GRCh38)
Structure: AlphaFold pLDDT 86.77 · 10 PDB
Residue 20: the ferm domain; a β-strand

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

Similar variants

MSN p.Ile20Val Uncertain significance ★ ⚠ same residue
MSN p.Arg171Trp Pathogenic ★★ same type
MSN p.Ala122Thr Uncertain significance ★★ ⚠ same type
MSN p.Arg273Trp Uncertain significance ★★ ⚠ same type
MSN p.Arg293Cys Uncertain significance ★★ ⚠ same type
MSN p.Arg294Cys Uncertain significance ★★ ⚠ same type
MSN p.Arg295His Uncertain significance ★★ ⚠ same type
MSN p.Arg393His Uncertain significance ★★ ⚠ same type

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/msn-p-ile20 (accessed [today's date]).

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