Is PTPRC p.Ala191= (c.573G>A) pathogenic?

PTPRC p.Ala191= (c.573G>A) is classified Likely benign in PTPRC (ClinVar, Single submitter, 1 submitter; last evaluated 2025-08-03). Ultra-rare (popmax 0.01%, amr); Associated with immunodeficiency 104.

What condition is associated with PTPRC p.Ala191= (c.573G>A)?

PTPRC p.Ala191= (c.573G>A) is associated with immunodeficiency 104 (ClinVar).

How common is PTPRC p.Ala191= (c.573G>A) in the general population?

PTPRC p.Ala191= (c.573G>A) is ultra-rare (popmax 0.01%, amr) (gnomAD).

PTPRC p.Ala191=

c.573G>A · rs769284265 · VCV2919099

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

ultra-rare (popmax 0.01%, amr)

Conditions

immunodeficiency 104

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -2.2	GERP -3.7
Overall
CADD	1.809	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.01% Admixed American · 6/59,996 alleles

Filtering AF 0.00428% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00295%

Overall 0.00062% 10/1,614,032 alleles · ultra-rare exomes 8/1,461,886 · genomes 2/152,146 · joint denominator

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.01%	9,999
African / African-American	0.00267%	37,457
Remaining individualsnot grpmax-eligible	0.0016%	62,488
European (non-Finnish)	8.47e-05%	1,180,034

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: PTPRC
Protein: p.Ala191=
Coding: c.573G>A
MANE Select: NM_002838
dbSNP: rs769284265
Type: single nucleotide variant
Location: chr1:198702520 (GRCh38)
Gene constraint: LOEUF 0.343 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 77.22 · 6 PDB

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

Disease context

immunodeficiency 104 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

PTPRC p.Ala191Val Uncertain significance ★★ ⚠ same residue
PTPRC c.583+1G>A Likely pathogenic ★★ same condition
PTPRC c.583+1G>T Likely pathogenic ★★ same condition
PTPRC p.Arg890Ter Pathogenic/Likely pathogenic ★★ same condition
PTPRC c.1830-3C>T Uncertain significance ★★ same condition
PTPRC c.3509+5G>A Uncertain significance ★★ same condition
PTPRC p.Ala113Ser Uncertain significance ★★ ⚠ same condition
PTPRC p.Ala60Thr Uncertain significance ★★ ⚠ 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/ptprc-p-ala191 (accessed [today's date]).

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