Is SETD1B p.Ala342Pro (c.1024G>C) pathogenic?

SETD1B p.Ala342Pro (c.1024G>C) is classified Uncertain significance in SETD1B (ClinVar, Single submitter, 1 submitter; last evaluated 2021-09-08). AlphaMissense: likely benign (0.0858); Absent from gnomAD v4.1.

How common is SETD1B p.Ala342Pro (c.1024G>C) in the general population?

SETD1B p.Ala342Pro (c.1024G>C) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about SETD1B p.Ala342Pro (c.1024G>C)?

AlphaMissense predicts likely benign (score 0.0858) — an in-silico prediction, not a clinical call.

SETD1B p.Ala342Pro

c.1024G>C · VCV4918925

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0858 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL indeterminate

Computational evidence

Protein change
AlphaMissense	0.0858	likely benign
REVEL	0.293	indeterminate
SaProt	LLR -6.81	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL is indeterminate.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 3.7	GERP 0.47, phastCons 1
Regional constraint	o/e 0.98	unconstrained · MANE · 795 bp · p 0.65 · regional, not allelic
Overall
CADD	21.2	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

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: SETD1B
Protein: p.Ala342Pro
Coding: c.1024G>C
MANE Select: NM_001353345
Type: single nucleotide variant
Location: chr12:121809969 (GRCh38)
Gene constraint: LOEUF 0.109 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 46.43 · 4 PDB

Full SETD1B gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

SETD1B p.Arg1329Ter Pathogenic ★★ same type
SETD1B p.Arg1703Ter Pathogenic/Likely pathogenic ★★ same type
SETD1B p.Arg1748Cys Pathogenic/Likely pathogenic ★★ same type
SETD1B p.Arg1792Gln Pathogenic/Likely pathogenic ★★ ⚠ same type
SETD1B p.Arg1825Trp Likely pathogenic ★★ same type
SETD1B p.Arg1902Cys Pathogenic/Likely pathogenic ★★ same type
SETD1B p.Gln780Ter Pathogenic/Likely pathogenic ★★ same type
SETD1B p.Glu1948Lys Pathogenic/Likely 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/setd1b-p-ala342pro (accessed [today's date]).

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