Is DCC p.Ala554Pro (c.1660G>C) pathogenic?

DCC p.Ala554Pro (c.1660G>C) is classified Uncertain significance in DCC (ClinVar, Single submitter, 1 submitter; last evaluated 2021-10-01). AlphaMissense: ambiguous (0.449); Ultra-rare (popmax 0.012%, afr); Associated with Inborn genetic diseases.

What condition is associated with DCC p.Ala554Pro (c.1660G>C)?

DCC p.Ala554Pro (c.1660G>C) is associated with Inborn genetic diseases (ClinVar).

How common is DCC p.Ala554Pro (c.1660G>C) in the general population?

DCC p.Ala554Pro (c.1660G>C) is ultra-rare (popmax 0.012%, afr) (gnomAD).

What do computational predictors say about DCC p.Ala554Pro (c.1660G>C)?

AlphaMissense predicts ambiguous (score 0.449) — an in-silico prediction, not a clinical call.

DCC p.Ala554Pro

c.1660G>C · rs145560552 · VCV2244436

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

ambiguous

0.449 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.012%, afr)

Missense predictors

0/2 damaging

REVEL, SaProt · AlphaMissense no call

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.449	ambiguous
REVEL	0.273	benign-leaning
SaProt	LLR -4.29	tolerated
⇒ REVEL and SaProt both call this tolerated; AlphaMissense makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 12	GERP 2.1, phastCons 1
Regional constraint	o/e 0.98	unconstrained · MANE · 1,190 kb · p 0.4 · regional, not allelic
Overall
CADD	22.8	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

Grpmax group 0.012% African / African-American · 9/74,876 alleles

Filtering AF 0.00624% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00468%

Overall 0.000558% 9/1,613,806 alleles · ultra-rare

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: DCC
Protein: p.Ala554Pro
Coding: c.1660G>C
MANE Select: NM_005215
dbSNP: rs145560552
Type: single nucleotide variant
Location: chr18:53205302 (GRCh38)
Gene constraint: LOEUF 0.414 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 68.60 · 9 PDB
Residue 554: the fibronectin type-iii 2 domain; a UniProt-annotated variant site (in mrmv1; likely pathogenic)

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

Disease context

Inborn genetic diseases — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

DCC p.Arg1021Ter Pathogenic ★★ same condition
DCC p.Arg597Gln Uncertain significance ★★ ⚠ same condition
DCC p.Gly84Arg Uncertain significance ★★ ⚠ same condition
DCC p.Ile1080Val Uncertain significance ★★ ⚠ same condition
DCC p.Gln486Leu Benign ★★ ⚠ same condition
DCC p.Arg215Ter Pathogenic ★ same condition
DCC c.3392+4G>A Uncertain significance ★ same condition
DCC c.986-3C>T 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/dcc-p-ala554pro (accessed [today's date]).

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