Is IMPG2 p.Asp55Ala (c.164A>C) pathogenic?

IMPG2 p.Asp55Ala (c.164A>C) is classified Uncertain significance in IMPG2 (ClinVar, Single submitter, 1 submitter; last evaluated 2019-04-25). AlphaMissense: likely benign (0.1014); Absent from gnomAD v4.1.

How common is IMPG2 p.Asp55Ala (c.164A>C) in the general population?

IMPG2 p.Asp55Ala (c.164A>C) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about IMPG2 p.Asp55Ala (c.164A>C)?

AlphaMissense predicts likely benign (score 0.1014) — an in-silico prediction, not a clinical call.

IMPG2 p.Asp55Ala

c.164A>C · VCV4963590

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1014 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1014	likely benign
REVEL	0.087	moderately benign-leaning
SaProt	LLR -6.04	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -0.17	GERP -0.82
Regional constraint	o/e 0.98	unconstrained · MANE · 93 kb · p 0.41 · regional, not allelic
Overall
CADD	18.11	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: IMPG2
Protein: p.Asp55Ala
Coding: c.164A>C
MANE Select: NM_016247
Type: single nucleotide variant
Location: chr3:101319754 (GRCh38)
Gene constraint: LOEUF 0.773 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 54.28

Full IMPG2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

IMPG2 p.Asp55= Conflicting classifications of pathogenicity ★ same residue
IMPG2 c.1240-1G>A Likely pathogenic ★★ same type
IMPG2 c.1240-2A>G Pathogenic/Likely pathogenic ★★ same type
IMPG2 c.502-2A>G Likely pathogenic ★★ same type
IMPG2 c.583+1G>C Pathogenic/Likely pathogenic ★★ same type
IMPG2 c.667-1G>A Pathogenic/Likely pathogenic ★★ same type
IMPG2 c.828+1G>A Pathogenic/Likely pathogenic ★★ same type
IMPG2 c.829-1G>T 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/impg2-p-asp55ala (accessed [today's date]).

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