Is MSN p.Phe267= (c.801C>T) pathogenic?

MSN p.Phe267= (c.801C>T) is classified Likely benign in MSN (ClinVar, Single submitter, 1 submitter; last evaluated 2025-11-11). Very rare (popmax 0.00177%, sas).

How common is MSN p.Phe267= (c.801C>T) in the general population?

MSN p.Phe267= (c.801C>T) is very rare (popmax 0.00177%, sas) (gnomAD).

MSN p.Phe267=

c.801C>T · VCV4764516

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00177%, sas)

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 0.05	GERP -3.4, phastCons 0.96
Overall
CADD	6.367	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00177% South Asian · 1/56,638 alleles

Overall 0.000166% 2/1,208,020 alleles · very rare exomes 1/1,095,251 · genomes 1/112,769 · joint denominator

Ancestry group	Frequency	1 in
South Asiangrpmax	0.00177%	56,638
European (non-Finnish)	0.000112%	894,254

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.Phe267=
Coding: c.801C>T
MANE Select: NM_002444
Type: single nucleotide variant
Location: chrX:65735272 (GRCh38)
Structure: AlphaFold pLDDT 86.77 · 10 PDB
Residue 267: the ferm domain; a β-strand

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

Similar variants

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
MSN p.Glu346Asp 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-phe267 (accessed [today's date]).

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