Is MEN1 p.Ala345Ser (c.1033G>T) pathogenic?

MEN1 p.Ala345Ser (c.1033G>T) is classified Uncertain significance in MEN1 (ClinVar, Multiple submitters, 3 submitters; last evaluated 2024-02-05). AlphaMissense: ambiguous (0.3602); Absent from gnomAD v4.1; Associated with hereditary neoplastic syndrome.

What condition is associated with MEN1 p.Ala345Ser (c.1033G>T)?

MEN1 p.Ala345Ser (c.1033G>T) is associated with hereditary neoplastic syndrome, multiple endocrine neoplasia type 1 (ClinVar).

How common is MEN1 p.Ala345Ser (c.1033G>T) in the general population?

MEN1 p.Ala345Ser (c.1033G>T) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about MEN1 p.Ala345Ser (c.1033G>T)?

AlphaMissense predicts ambiguous (score 0.3602) — an in-silico prediction, not a clinical call.

MEN1 p.Ala345Ser

c.1033G>T · rs1941714762 · VCV1771946

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 3 submitters

AlphaMissense

ambiguous

0.3602 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Conditions

hereditary neoplastic syndrome

Computational evidence

Protein change
AlphaMissense	0.3602	ambiguous
REVEL	0.643	indeterminate
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.5	GERP 1.1, phastCons 1
Regional constraint	o/e 0.61	unconstrained · MANE · 4,962 bp · p 4.4e-20 · regional, not allelic
Overall
CADD	21.2	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

⚠ Isoform check: AlphaMissense numbered on a different transcript (AM A350S vs ClinVar A345S) — verify the residue.

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: MEN1
Protein: p.Ala345Ser
Coding: c.1033G>T
MANE Select: NM_001370259
dbSNP: rs1941714762
Type: single nucleotide variant
Location: chr11:64806248 (GRCh38)
Gene constraint: LOEUF 0.206 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 85.13 · 69 PDB
Residue 345: the 'interaction with fancd2' region; an α-helix

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

Disease context

hereditary neoplastic syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: multiple endocrine neoplasia type 1

Similar variants

MEN1 p.Ala345= Likely benign ★ 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
MEN1 c.1350+1G>A Pathogenic ★★ same condition
MEN1 c.1351-2A>C Pathogenic/Likely pathogenic ★★ same condition
MEN1 c.1351-2A>G Pathogenic ★★ same condition
MEN1 c.1351-9C>G 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-ala345ser (accessed [today's date]).

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