Is MEN1 p.Tyr321= (c.963C>T) pathogenic?

MEN1 p.Tyr321= (c.963C>T) is classified Conflicting classifications of pathogenicity in MEN1 (ClinVar, Conflicting submitters, 5 submitters; last evaluated 2026-01-28). Very rare (popmax 8.47e-05%, nfe); Associated with multiple endocrine neoplasia type 1.

What condition is associated with MEN1 p.Tyr321= (c.963C>T)?

MEN1 p.Tyr321= (c.963C>T) is associated with multiple endocrine neoplasia type 1, hereditary neoplastic syndrome (ClinVar).

How common is MEN1 p.Tyr321= (c.963C>T) in the general population?

MEN1 p.Tyr321= (c.963C>T) is very rare (popmax 8.47e-05%, nfe) (gnomAD).

How is Multiple endocrine neoplasia type 1 inherited?

Typically Autosomal dominant, Not applicable (Orphanet). A genetic counselor can assess individual risk for a family.

MEN1 p.Tyr321=

c.963C>T · rs1555165094 · VCV527319

Conflicting classifications of pathogenicity Conflicting submitters

Classification

Conflicting classifications of pathogenicity

ClinVar

Review

Conflicting submitters ★☆☆☆

ClinVar · 5 submitters

gnomAD v4.1

Rare

very rare (popmax 8.47e-05%, nfe)

Conditions

multiple endocrine neoplasia type 1

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	<0.2	all four deltas below 0.2 · G>C here scores Δ0.28 · evaluated, not missing
Constraint at this position
Conservation	phyloP 3.8	GERP -1.1, phastCons 1
Overall
CADD	9.364	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 8.47e-05% European (non-Finnish) · 1/1,180,014 alleles

Overall 6.84e-05% 1/1,461,866 alleles · very rare

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: MEN1
Protein: p.Tyr321=
Coding: c.963C>T
MANE Select: NM_001370259
dbSNP: rs1555165094
Type: single nucleotide variant
Location: chr11:64806318 (GRCh38)
Gene constraint: LOEUF 0.206 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 85.13 · 69 PDB
Residue 321: the 'interaction with fancd2' region; an α-helix

Full MEN1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

multiple endocrine neoplasia type 1 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: hereditary neoplastic syndrome

For Multiple endocrine neoplasia type 1 (Orphanet):

Inheritance: Autosomal dominant, Not applicable
Onset: All ages
Prevalence: 1-9 / 100 000 (Europe)

Similar variants

MEN1 p.Tyr321Ter Pathogenic ★ same residue
MEN1 p.Tyr321Asn Uncertain significance ★ ⚠ same residue
MEN1 p.Tyr321Cys Uncertain significance ★ ⚠ same residue
MEN1 p.Tyr321His Uncertain significance ★ ⚠ same residue
MEN1 p.Tyr321fs Pathogenic ★★ same residue
MEN1 c.1049+1G>A Pathogenic ★★ same condition
MEN1 c.1049+1G>C Pathogenic ★★ same condition
MEN1 c.1049+2T>C Pathogenic/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/men1-p-tyr321 (accessed [today's date]).

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