Is SH2B3 p.Phe431= (c.1293T>C) pathogenic?

SH2B3 p.Phe431= (c.1293T>C) is classified Likely benign in SH2B3 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-12-09). Very rare (popmax 0.00134%, afr); Associated with Inborn genetic diseases.

What condition is associated with SH2B3 p.Phe431= (c.1293T>C)?

SH2B3 p.Phe431= (c.1293T>C) is associated with Inborn genetic diseases (ClinVar).

How common is SH2B3 p.Phe431= (c.1293T>C) in the general population?

SH2B3 p.Phe431= (c.1293T>C) is very rare (popmax 0.00134%, afr) (gnomAD).

SH2B3 p.Phe431=

c.1293T>C · VCV4630783

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00134%, afr)

Conditions

Inborn genetic diseases

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 -0.2	GERP -2.7, phastCons 0.3
Overall
CADD	8.955	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00134% African / African-American · 1/74,900 alleles

Overall 0.000657% 1/152,108 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: SH2B3
Protein: p.Phe431=
Coding: c.1293T>C
MANE Select: NM_005475
Type: single nucleotide variant
Location: chr12:111447712 (GRCh38)
Gene constraint: LOEUF 1.35 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 63.45
Residue 431: a UniProt-annotated variant site (found in a patient with isolated erythrocytosis; uncertain significance); the sh2 domain

Full SH2B3 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Inborn genetic diseases — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

SH2B3 p.Phe431Leu Uncertain significance ★ ⚠ same residue
SH2B3 p.Phe431Ser Uncertain significance ★ ⚠ same residue
SH2B3 p.Ala161Val Uncertain significance ★★ ⚠ same condition
SH2B3 p.Ala174Thr Uncertain significance ★★ ⚠ same condition
SH2B3 p.Ala300Thr Uncertain significance ★★ ⚠ same condition
SH2B3 p.Arg221Met Uncertain significance ★★ ⚠ same condition
SH2B3 p.Arg226Trp Uncertain significance ★★ ⚠ same condition
SH2B3 p.Arg235Cys 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/sh2b3-p-phe431 (accessed [today's date]).

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