Is CAD p.Arg177Trp (c.529C>T) pathogenic?

CAD p.Arg177Trp (c.529C>T) is classified Uncertain significance in CAD (ClinVar, Single submitter, 1 submitter; last evaluated 2023-11-15). AlphaMissense: likely benign (0.2311); Absent from gnomAD v4.1.

How common is CAD p.Arg177Trp (c.529C>T) in the general population?

CAD p.Arg177Trp (c.529C>T) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about CAD p.Arg177Trp (c.529C>T)?

AlphaMissense predicts likely benign (score 0.2311) — an in-silico prediction, not a clinical call.

CAD p.Arg177Trp

c.529C>T · rs1675225857 · VCV2718651

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.2311 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

2/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.2311	likely benign
REVEL	0.76	pathogenic-leaning
SaProt	LLR -15.20	damaging
⇒ REVEL and SaProt call this damaging; AlphaMissense does not.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 2.7	GERP 2.2, phastCons 1
Regional constraint	o/e 0.93	unconstrained · MANE · 5,475 bp · p 0.17 · regional, not allelic
Overall
CADD	25.1	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: CAD
Protein: p.Arg177Trp
Coding: c.529C>T
MANE Select: NM_004341
dbSNP: rs1675225857
Type: single nucleotide variant
Location: chr2:27222552 (GRCh38)
Gene constraint: LOEUF 0.409 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 87.25 · 57 PDB
Residue 177: a UniProt-annotated variant site (in a colorectal cancer sample; somatic mutation); the glutamine amidotransferase type-1 domain; the 'gatase (glutamine amidotransferase)' region

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

Similar variants

CAD p.Arg177Gln Uncertain significance ★ ⚠ same residue
CAD p.Arg177= Likely benign ★ same residue
CAD p.Arg1789Ter Pathogenic ★★ same type
CAD p.Arg1810Gln Pathogenic/Likely pathogenic ★★ ⚠ same type
CAD p.Arg191Ter Pathogenic ★★ same type
CAD p.Gln1604Ter Likely pathogenic ★★ same type
CAD p.Met33Arg Pathogenic ★★ same type
CAD c.1254+6G>A Uncertain significance ★★ 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/cad-p-arg177trp (accessed [today's date]).

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