Is CD46 p.Ala338= (c.1014C>T) pathogenic?

CD46 p.Ala338= (c.1014C>T) is classified Likely benign in CD46 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-10-02). Absent from gnomAD v4.1; Associated with atypical hemolytic-uremic syndrome.

What condition is associated with CD46 p.Ala338= (c.1014C>T)?

CD46 p.Ala338= (c.1014C>T) is associated with atypical hemolytic-uremic syndrome (ClinVar).

How common is CD46 p.Ala338= (c.1014C>T) in the general population?

CD46 p.Ala338= (c.1014C>T) is absent from gnomAD v4.1 (gnomAD).

How is Atypical hemolytic uremic syndrome inherited?

Typically Autosomal dominant, Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

CD46 p.Ala338=

c.1014C>T · VCV4291215

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Absent

absent from gnomAD v4.1

Conditions

atypical hemolytic-uremic syndrome

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP -0.66	GERP -0.94
Overall
CADD	1.557	PHRED · no single calibrated threshold — expert panels disagree

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: CD46
Protein: p.Ala338=
Coding: c.1014C>T
MANE Select: NM_172351
Type: single nucleotide variant
Location: chr1:207785102 (GRCh38)
Gene constraint: LOEUF 0.763 · pLI 0.04 (gnomAD)
Structure: AlphaFold pLDDT 82.38 · 7 PDB

Full CD46 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

atypical hemolytic-uremic syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Atypical hemolytic uremic syndrome (Orphanet):

Inheritance: Autosomal dominant, Autosomal recessive, Not applicable
Onset: All ages
Prevalence: 1-9 / 1 000 000 (United States)

Similar variants

CD46 p.Ala338Val Benign/Likely benign ★★ same residue
CD46 c.1082+2T>A Pathogenic ★★ same condition
CD46 c.286+1G>C Pathogenic/Likely pathogenic ★★ same condition
CD46 c.286+2T>G Pathogenic/Likely pathogenic ★★ same condition
CD46 c.287-2A>G Pathogenic/Likely pathogenic ★★ same condition
CD46 p.Arg229Ter Pathogenic/Likely pathogenic ★★ same condition
CD46 p.Arg59Ter Pathogenic/Likely pathogenic ★★ same condition
CD46 p.Phe242Cys 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/cd46-p-ala338 (accessed [today's date]).

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