Is DCX p.Ser128Phe (c.383C>T) pathogenic?

DCX p.Ser128Phe (c.383C>T) is classified Likely pathogenic in DCX (ClinVar, Single submitter, 1 submitter; last evaluated 2022-09-01). AlphaMissense: likely pathogenic (0.9985); Absent from gnomAD v4.1.

How common is DCX p.Ser128Phe (c.383C>T) in the general population?

DCX p.Ser128Phe (c.383C>T) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about DCX p.Ser128Phe (c.383C>T)?

AlphaMissense predicts likely pathogenic (score 0.9985) — an in-silico prediction, not a clinical call.

DCX p.Ser128Phe

c.383C>T · rs2524836385 · VCV2015926

Likely pathogenic Single submitter

Classification

Likely pathogenic

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.9985 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

3/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.9985	likely pathogenic ✓ concordant with ClinVar
REVEL	0.814	moderately pathogenic-leaning
SaProt	LLR -14.38	damaging
⇒ AlphaMissense, REVEL and SaProt all call this damaging.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 12	GERP -0.84, phastCons 1
Regional constraint	o/e 0.31	constrained · MANE · 77 kb · p 4.4e-24 · regional, not allelic
Overall
CADD	27.4	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

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: DCX
Protein: p.Ser128Phe
Coding: c.383C>T
MANE Select: NM_001195553
dbSNP: rs2524836385
Type: single nucleotide variant
Location: chrX:111401312 (GRCh38)
Structure: AlphaFold pLDDT 67.19 · 14 PDB
Residue 128: the doublecortin 1 domain; a β-strand

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

Similar variants

DCX c.364+1G>A Likely pathogenic ★★ same type
DCX c.705+1G>A Pathogenic ★★ same type
DCX c.706-2A>G Pathogenic ★★ same type
DCX c.809-1G>A Pathogenic/Likely pathogenic ★★ same type
DCX p.Ala204Asp Pathogenic ★★ same type
DCX p.Ala251Ser Pathogenic ★★ same type
DCX p.Arg178Cys Pathogenic/Likely pathogenic ★★ same type
DCX p.Arg186Cys Pathogenic ★★ same type

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/dcx-p-ser128phe (accessed [today's date]).

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