Is LEFTY2 p.Ser319= (c.957G>A) pathogenic?

LEFTY2 p.Ser319= (c.957G>A) is classified Likely benign in LEFTY2 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-12-25). Ultra-rare (popmax 0.0233%, amr); Associated with Left-right axis malformations.

What condition is associated with LEFTY2 p.Ser319= (c.957G>A)?

LEFTY2 p.Ser319= (c.957G>A) is associated with Left-right axis malformations (ClinVar).

How common is LEFTY2 p.Ser319= (c.957G>A) in the general population?

LEFTY2 p.Ser319= (c.957G>A) is ultra-rare (popmax 0.0233%, amr) (gnomAD).

LEFTY2 p.Ser319=

c.957G>A · rs756750444 · VCV2866576

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

ultra-rare (popmax 0.0233%, amr)

Conditions

Left-right axis malformations

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 -15	GERP -3.7
Overall
CADD	0.274	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0233% Admixed American · 14/60,000 alleles

Filtering AF 0.0141% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0112%

Overall 0.00304% 49/1,613,930 alleles · ultra-rare exomes 42/1,461,752 · genomes 7/152,178 · joint denominator

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.0233%	4,286
African / African-American	0.012%	8,323
East Asian	0.00223%	44,892
South Asian	0.0022%	45,539
European (non-Finnish)	0.00195%	51,307

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: LEFTY2
Protein: p.Ser319=
Coding: c.957G>A
MANE Select: NM_003240
dbSNP: rs756750444
Type: single nucleotide variant
Location: chr1:225937585 (GRCh38)
Gene constraint: LOEUF 0.703 · pLI 0.35 (gnomAD)
Structure: AlphaFold pLDDT 79.01

Full LEFTY2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Left-right axis malformations — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

LEFTY2 p.Arg243Gly Uncertain significance ★★ ⚠ same condition
LEFTY2 p.Arg265Cys Uncertain significance ★★ ⚠ same condition
LEFTY2 p.Arg314Gln Uncertain significance ★★ ⚠ same condition
LEFTY2 p.Arg33Trp Uncertain significance ★★ ⚠ same condition
LEFTY2 p.Arg67His Uncertain significance ★★ ⚠ same condition
LEFTY2 p.Asp241Glu Uncertain significance ★★ same condition
LEFTY2 p.Asp356Asn Uncertain significance ★★ ⚠ same condition
LEFTY2 p.Gln200Glu 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/lefty2-p-ser319 (accessed [today's date]).

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