Is GDF6 p.Ser418= (c.1254C>T) pathogenic?

GDF6 p.Ser418= (c.1254C>T) is classified Likely benign in GDF6 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-03-03). Very rare (popmax 0.00133%, afr); Associated with microphthalmia, isolated, with coloboma 6.

What condition is associated with GDF6 p.Ser418= (c.1254C>T)?

GDF6 p.Ser418= (c.1254C>T) is associated with microphthalmia, isolated, with coloboma 6, Klippel-Feil syndrome 1, autosomal dominant, isolated microphthalmia 4 (ClinVar).

How common is GDF6 p.Ser418= (c.1254C>T) in the general population?

GDF6 p.Ser418= (c.1254C>T) is very rare (popmax 0.00133%, afr) (gnomAD).

GDF6 p.Ser418=

c.1254C>T · rs1195615332 · VCV1146271

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00133%, afr)

Conditions

microphthalmia, isolated, with coloboma 6

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
REVEL	0.351	indeterminate
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 4.6	GERP -1.5, phastCons 1
Overall
CADD	10.85	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00133% African / African-American · 1/74,942 alleles

Overall 6.2e-05% 1/1,614,080 alleles · very rare exomes 0/1,461,854 · genomes 1/152,226 · joint denominator

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: GDF6
Protein: p.Ser418=
Coding: c.1254C>T
MANE Select: NM_001001557
dbSNP: rs1195615332
Type: single nucleotide variant
Location: chr8:96144677 (GRCh38)
Gene constraint: LOEUF 0.342 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 70.88

Full GDF6 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

microphthalmia, isolated, with coloboma 6 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: Klippel-Feil syndrome 1, autosomal dominant isolated microphthalmia 4 Leber congenital amaurosis 17

Similar variants

GDF6 p.Ser418Asn Uncertain significance ★ ⚠ same residue
GDF6 c.*268G>C Uncertain significance ★★ same condition
GDF6 c.*273C>T Uncertain significance ★★ same condition
GDF6 c.*274T>C Uncertain significance ★★ same condition
GDF6 p.Ala199Thr Uncertain significance ★★ ⚠ same condition
GDF6 p.Ala199Val Uncertain significance ★★ ⚠ same condition
GDF6 p.Ala242Thr Uncertain significance ★★ ⚠ same condition
GDF6 p.Ala247Glu 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/gdf6-p-ser418 (accessed [today's date]).

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