Is PIGO p.Pro574Arg (c.1721C>G) pathogenic?

PIGO p.Pro574Arg (c.1721C>G) is classified Uncertain significance in PIGO (ClinVar, Multiple submitters, 3 submitters; last evaluated 2025-08-01). AlphaMissense: likely benign (0.1392); Very rare (popmax 0.00933%, afr); Associated with Inborn genetic diseases.

What condition is associated with PIGO p.Pro574Arg (c.1721C>G)?

PIGO p.Pro574Arg (c.1721C>G) is associated with Inborn genetic diseases, hyperphosphatasia with intellectual disability syndrome 2 (ClinVar).

How common is PIGO p.Pro574Arg (c.1721C>G) in the general population?

PIGO p.Pro574Arg (c.1721C>G) is very rare (popmax 0.00933%, afr) (gnomAD).

What do computational predictors say about PIGO p.Pro574Arg (c.1721C>G)?

AlphaMissense predicts likely benign (score 0.1392) — an in-silico prediction, not a clinical call.

PIGO p.Pro574Arg

c.1721C>G · rs558371613 · VCV575930

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 3 submitters

AlphaMissense

likely benign

0.1392 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00933%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.1392	likely benign
REVEL	0.117	moderately benign-leaning
SaProt	LLR -7.41	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 4.8	GERP -0.66, phastCons 1
Regional constraint	o/e 0.88	unconstrained · MANE · 6,470 bp · p 2e-05 · regional, not allelic
Overall
CADD	16.75	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

Grpmax group 0.00933% African / African-American · 7/75,058 alleles

Filtering AF 0.00741% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00692%

Overall 0.00712% 115/1,614,212 alleles · very rare exomes 111/1,461,890 · genomes 4/152,322 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00933%	10,723
European (non-Finnish)	0.00881%	11,347
Remaining individualsnot grpmax-eligible	0.0048%	20,837
South Asian	0.0011%	91,084

Rarity supports pathogenicity (ACMG PM2); frequency above a disease-specific BA1/BS1 threshold argues against it. A variant frequent in one ancestry group can be near-absent in others, so a single global figure can mislead.

Variant & gene context

Gene: PIGO
Protein: p.Pro574Arg
Coding: c.1721C>G
MANE Select: NM_032634
dbSNP: rs558371613
Type: single nucleotide variant
Location: chr9:35092166 (GRCh38)
Gene constraint: LOEUF 0.89 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 82.57
Residue 574: a UniProt-annotated variant site (in hpmrs2)

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

Disease context

Inborn genetic diseases — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: hyperphosphatasia with intellectual disability syndrome 2

Similar variants

PIGO p.Pro574Ser Uncertain significance ★★ ⚠ same residue
PIGO p.Pro574= Likely benign ★ same residue
PIGO c.2648-1G>A Likely pathogenic ★★ same condition
PIGO c.3069+2T>C Likely pathogenic ★★ same condition
PIGO c.3069+5G>A Pathogenic/Likely pathogenic ★★ same condition
PIGO p.Arg119Trp Likely pathogenic ★★ ⚠ same condition
PIGO p.Arg122Ter Pathogenic/Likely pathogenic ★★ same condition
PIGO p.Arg376Ter Pathogenic/Likely 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/pigo-p-pro574arg (accessed [today's date]).

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