Is DCDC2 c.557+14A>G pathogenic?

DCDC2 c.557+14A>G is classified Likely benign in DCDC2 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-06-22). Ultra-rare (popmax 0.043%, sas); Associated with isolated neonatal sclerosing cholangitis.

What condition is associated with DCDC2 c.557+14A>G?

DCDC2 c.557+14A>G is associated with isolated neonatal sclerosing cholangitis, autosomal recessive nonsyndromic hearing loss 66 (ClinVar).

How common is DCDC2 c.557+14A>G in the general population?

DCDC2 c.557+14A>G is ultra-rare (popmax 0.043%, sas) (gnomAD).

How is Isolated neonatal sclerosing cholangitis inherited?

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

DCDC2 c.557+14A>G

rs775645058 · VCV1904109

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

ultra-rare (popmax 0.043%, sas)

Conditions

isolated neonatal sclerosing cholangitis

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
Splice region	donor +14	near-intronic (+14 nt from the splice site)
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -4.4	GERP -3.3
Overall
CADD	0.003	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.043% South Asian · 39/90,778 alleles

Filtering AF 0.0323% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0285%

Overall 0.00267% 43/1,611,864 alleles · ultra-rare

Ancestry group	Frequency	1 in
South Asiangrpmax	0.043%	2,328
Remaining individualsnot grpmax-eligible	0.0016%	62,384
European (non-Finnish)	0.000254%	392,989

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: DCDC2
Coding: c.557+14A>G
MANE Select: NM_016356
dbSNP: rs775645058
Type: single nucleotide variant
Location: chr6:24301701 (GRCh38)
Gene constraint: LOEUF 1.062 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 63.93 · 1 PDB

Full DCDC2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

isolated neonatal sclerosing cholangitis — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: autosomal recessive nonsyndromic hearing loss 66

For Isolated neonatal sclerosing cholangitis (Orphanet):

Inheritance: Autosomal recessive
Onset: Neonatal

Similar variants

DCDC2 c.294-2A>G Pathogenic ★★ same condition
DCDC2 c.349-2A>G Pathogenic ★★ same condition
DCDC2 c.705-2A>G Pathogenic ★★ same condition
DCDC2 p.Leu297Ter Pathogenic ★★ same condition
DCDC2 p.Met1Arg Pathogenic/Likely pathogenic ★★ ⚠ same condition
DCDC2 p.Ser128Ter Pathogenic/Likely pathogenic ★★ same condition
DCDC2 p.Ala384Gly Uncertain significance ★★ ⚠ same condition
DCDC2 p.Ala93Asp 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/dcdc2-c-557-plus-14a-g (accessed [today's date]).

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