Is PPCS p.Ala111Thr (c.331G>A) pathogenic?

PPCS p.Ala111Thr (c.331G>A) is classified Uncertain significance in PPCS (ClinVar, Single submitter, 1 submitter; last evaluated 2021-08-31). AlphaMissense: likely benign (0.0729); No allele count reported in gnomAD v4.1 (AN 1,612,132).

How common is PPCS p.Ala111Thr (c.331G>A) in the general population?

PPCS p.Ala111Thr (c.331G>A) is no allele count reported in gnomAD v4.1 (AN 1,612,132) (gnomAD).

What do computational predictors say about PPCS p.Ala111Thr (c.331G>A)?

AlphaMissense predicts likely benign (score 0.0729) — an in-silico prediction, not a clinical call.

PPCS p.Ala111Thr

c.331G>A · rs1258443457 · VCV1518021

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0729 · ACMG-weighted

gnomAD v4.1

Not reported

no allele count reported in gnomAD v4.1 (AN 1,612,132)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

⚠ Built without this gene's context — gene constraint and dosage, protein structure, pathways, panels and related-variant links were not looked up for this page. why

Computational evidence

Protein change
AlphaMissense	0.0729	likely benign
REVEL	0.027	moderately benign-leaning
SaProt	LLR -4.72	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not looked up on this page · why
Constraint at this position
Conservation	phyloP 1.8	GERP -2, phastCons 0.016
Regional constraint	o/e 1.04	unconstrained · MANE · 687 bp · p 0.55 · regional, not allelic
Overall
CADD	13.1	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

No allele count reported in gnomAD v4.1 (AN 1,612,132). This is missing data, not an absence: the variant may or may not be present in gnomAD. Rarity (ACMG PM2) and BA1/BS1 cannot be assessed for it.

Variant & gene context

Gene: PPCS
Protein: p.Ala111Thr
Coding: c.331G>A
MANE Select: NM_024664
dbSNP: rs1258443457
Type: single nucleotide variant
Location: chr1:42456896 (GRCh38)

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

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/ppcs-p-ala111thr (accessed [today's date]).

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