Is CHD3 p.Arg985Pro (c.2954G>C) pathogenic?

CHD3 p.Arg985Pro (c.2954G>C) is classified Likely pathogenic in CHD3 (ClinVar, No assertion criteria, 1 submitter). AlphaMissense: likely pathogenic (0.996); Absent from gnomAD v4.1; Associated with Snijders Blok-Campeau syndrome.

What condition is associated with CHD3 p.Arg985Pro (c.2954G>C)?

CHD3 p.Arg985Pro (c.2954G>C) is associated with Snijders Blok-Campeau syndrome (ClinVar).

How common is CHD3 p.Arg985Pro (c.2954G>C) in the general population?

CHD3 p.Arg985Pro (c.2954G>C) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about CHD3 p.Arg985Pro (c.2954G>C)?

AlphaMissense predicts likely pathogenic (score 0.996) — an in-silico prediction, not a clinical call.

CHD3 p.Arg985Pro

c.2954G>C · rs1567856331 · VCV2507027

Likely pathogenic No assertion criteria

Classification

Likely pathogenic

ClinVar

Review

No assertion criteria ☆☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.996 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

3/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Snijders Blok-Campeau syndrome

Computational evidence

Protein change
AlphaMissense	0.996	likely pathogenic ✓ concordant with ClinVar
REVEL	0.777	moderately pathogenic-leaning
SaProt	LLR -12.91	damaging
⇒ AlphaMissense, REVEL and SaProt all call this damaging.
Splicing
SpliceAI	<0.2	all four deltas below 0.2 · G>A here scores Δ0.35 · evaluated, not missing
Constraint at this position
Conservation	phyloP 10	GERP 1.9, phastCons 1
Regional constraint	o/e 0.19	constrained · MANE · 995 bp · p 7.8e-29 · regional, not allelic
Overall
CADD	31.0	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: CHD3
Protein: p.Arg985Pro
Coding: c.2954G>C
MANE Select: NM_001005273
dbSNP: rs1567856331
Type: single nucleotide variant
Location: chr17:7900707 (GRCh38)
Gene constraint: LOEUF 0.257 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 63.21
Residue 985: a UniProt-annotated variant site (in snibcps)

Full CHD3 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Snijders Blok-Campeau syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

CHD3 p.Arg985Gln Pathogenic ★★ same residue
CHD3 p.Arg985Trp Pathogenic/Likely pathogenic ★★ same residue
CHD3 c.4073-2A>C Likely pathogenic ★★ same condition
CHD3 p.Arg1078Gln Pathogenic/Likely pathogenic ★★ same condition
CHD3 p.Arg1121Pro Pathogenic/Likely pathogenic ★★ same condition
CHD3 p.Arg1169Gln Pathogenic/Likely pathogenic ★★ same condition
CHD3 p.Arg1169Pro Pathogenic/Likely pathogenic ★★ same condition
CHD3 p.Arg1169Trp Pathogenic ★★ 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/chd3-p-arg985pro (accessed [today's date]).

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