Is DCC p.Arg1149Ter (c.3445C>T) pathogenic?

DCC p.Arg1149Ter (c.3445C>T) is classified Conflicting classifications of pathogenicity in DCC (ClinVar, Conflicting submitters, 2 submitters; last evaluated 2026-06-28). Very rare (popmax 0.00167%, amr); Associated with Inborn genetic diseases.

What condition is associated with DCC p.Arg1149Ter (c.3445C>T)?

DCC p.Arg1149Ter (c.3445C>T) is associated with Inborn genetic diseases (ClinVar).

How common is DCC p.Arg1149Ter (c.3445C>T) in the general population?

DCC p.Arg1149Ter (c.3445C>T) is very rare (popmax 0.00167%, amr) (gnomAD).

DCC p.Arg1149Ter

c.3445C>T · VCV3384457

Conflicting classifications of pathogenicity Conflicting submitters

Classification

Conflicting classifications of pathogenicity

ClinVar

Review

Conflicting submitters ★☆☆☆

ClinVar · 2 submitters

Consequence

nonsense (stop-gain)

predicted LoF

gnomAD v4.1

Rare

very rare (popmax 0.00167%, amr)

Conditions

Inborn genetic diseases

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Consequence	nonsense (stop-gain)	predicted loss-of-function in a LoF-intolerant gene
NMD	predicted	premature termination codon in exon 24 of 29
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 0.032	GERP -3.9, phastCons 0.001
Overall
CADD	36.0	PHRED · no single calibrated threshold — expert panels disagree

Predicted loss-of-function is descriptive, not an applied PVS1 code.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00167% Admixed American · 1/59,992 alleles

Filtering AF 2.8e-05% ClinGen BA1/BS1 input FAF95, joint · FAF99 1.1e-05%

Overall 0.000205% 3/1,461,840 alleles · very rare

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.00167%	59,992
European (non-Finnish)	0.000169%	590,005

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.Arg1149Ter
Coding: c.3445C>T
MANE Select: NM_005215
Type: single nucleotide variant
Location: chr18:53459284 (GRCh38)
Gene constraint: LOEUF 0.414 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 68.60 · 9 PDB
Residue 1149: the 'disordered' region; 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.Arg1149Leu Uncertain significance ★ ⚠ same residue
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

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-arg1149ter (accessed [today's date]).

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