Is PGR p.Pro491Arg (c.1472C>G) pathogenic?

PGR p.Pro491Arg (c.1472C>G) is classified Uncertain significance in PGR (ClinVar, Single submitter, 1 submitter; last evaluated 2022-05-04). AlphaMissense: likely benign (0.17); Very rare (popmax 0.00256%, sas).

How common is PGR p.Pro491Arg (c.1472C>G) in the general population?

PGR p.Pro491Arg (c.1472C>G) is very rare (popmax 0.00256%, sas) (gnomAD).

What do computational predictors say about PGR p.Pro491Arg (c.1472C>G)?

AlphaMissense predicts likely benign (score 0.17) — an in-silico prediction, not a clinical call.

PGR p.Pro491Arg

c.1472C>G · rs756644416 · VCV2287293

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.17 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00256%, sas)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.17	likely benign
REVEL	0.081	moderately benign-leaning
SaProt	LLR -7.96	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 6.7	phastCons 1
Regional constraint	o/e 1.14	unconstrained · MANE · 2,957 bp · p 0.00013 · regional, not allelic
Overall
CADD	22.1	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

Grpmax group 0.00256% South Asian · 1/38,990 alleles

Filtering AF 0.00126% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00103%

Overall 0.00161% 21/1,302,734 alleles · very rare exomes 19/1,151,184 · genomes 2/151,550 · joint denominator

Ancestry group	Frequency	1 in
South Asiangrpmax	0.00256%	38,990
European (non-Finnish)	0.00193%	51,730

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: PGR
Protein: p.Pro491Arg
Coding: c.1472C>G
MANE Select: NM_000926
dbSNP: rs756644416
Type: single nucleotide variant
Location: chr11:101127599 (GRCh38)
Gene constraint: LOEUF 0.554 · pLI 0.72 (gnomAD)
Structure: AlphaFold pLDDT 57.66 · 21 PDB
Residue 491: the 'af1; mediates transcriptional activation' region; the 'modulating, pro-rich' region

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

Similar variants

PGR p.Pro491Ser Uncertain significance ★ ⚠ same residue
PGR p.Arg187= Benign ★★ same type
PGR p.Arg623= Benign ★★ same type
PGR p.Cys347Ser Benign ★★ same type
PGR p.Gln536Pro Benign ★★ same type
PGR p.Gln75Lys Likely benign ★★ same type
PGR p.Gln868= Benign ★★ same type
PGR p.Gly263= Benign ★★ 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/pgr-p-pro491arg (accessed [today's date]).

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