Is LEFTY2 p.Phe101= (c.303C>T) pathogenic?

LEFTY2 p.Phe101= (c.303C>T) is classified Likely benign in LEFTY2 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-09-27). No allele count reported in gnomAD v4.1 (AN 1,594,616); Associated with Left-right axis malformations.

What condition is associated with LEFTY2 p.Phe101= (c.303C>T)?

LEFTY2 p.Phe101= (c.303C>T) is associated with Left-right axis malformations (ClinVar).

How common is LEFTY2 p.Phe101= (c.303C>T) in the general population?

LEFTY2 p.Phe101= (c.303C>T) is no allele count reported in gnomAD v4.1 (AN 1,594,616) (gnomAD).

LEFTY2 p.Phe101=

c.303C>T · rs1672277885 · VCV2880373

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Not reported

no allele count reported in gnomAD v4.1 (AN 1,594,616)

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 1.3	GERP -1, phastCons 0.83
Overall
CADD	10.36	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

No allele count reported in gnomAD v4.1 (AN 1,594,616). This is missing data, not an absence: the variant may or may not be present in gnomAD. Rarity (ACMG PM2) and BA1/BS1 cannot be assessed for it.

Variant & gene context

Gene: LEFTY2
Protein: p.Phe101=
Coding: c.303C>T
MANE Select: NM_003240
dbSNP: rs1672277885
Type: single nucleotide variant
Location: chr1:225939950 (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.Phe101Leu Uncertain significance ★ ⚠ same residue
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

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-phe101 (accessed [today's date]).

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