Is ITGA3 p.Arg38Ter (c.112C>T) pathogenic?

ITGA3 p.Arg38Ter (c.112C>T) is classified Likely pathogenic in ITGA3 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-07-25). Very rare (popmax 0.00026%, nfe).

How common is ITGA3 p.Arg38Ter (c.112C>T) in the general population?

ITGA3 p.Arg38Ter (c.112C>T) is very rare (popmax 0.00026%, nfe) (gnomAD).

ITGA3 p.Arg38Ter

c.112C>T · VCV4856971

Likely pathogenic Single submitter

Classification

Likely pathogenic

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

Consequence

nonsense (stop-gain)

predicted LoF

gnomAD v4.1

Rare

very rare (popmax 0.00026%, nfe)

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Consequence	nonsense (stop-gain)	predicted loss-of-function
NMD	predicted	premature termination codon in exon 1 of 26
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 5.8	GERP 1.9, phastCons 1
Overall
CADD	38.0	PHRED · no single calibrated threshold — expert panels disagree

Predicted loss-of-function is descriptive, not an applied PVS1 code.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00026% European (non-Finnish) · 3/1,155,416 alleles

Filtering AF 6.9e-05% ClinGen BA1/BS1 input FAF95, joint · FAF99 1.9e-05%

Overall 0.000192% 3/1,564,522 alleles · very rare exomes 3/1,412,138 · genomes 0/152,384 · joint denominator

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: ITGA3
Protein: p.Arg38Ter
Coding: c.112C>T
MANE Select: NM_002204
Type: single nucleotide variant
Location: chr17:50056551 (GRCh38)
Gene constraint: LOEUF 0.69 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 83.88

Full ITGA3 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

ITGA3 c.2070+1G>A Pathogenic ★★ same type
ITGA3 p.Arg274Gln Likely pathogenic ★★ ⚠ same type
ITGA3 p.Arg875Ter Likely pathogenic ★★ same type
ITGA3 c.*48G>A Uncertain significance ★★ same type
ITGA3 c.*96G>A Uncertain significance ★★ same type
ITGA3 p.Ala1026Val Uncertain significance ★★ ⚠ same type
ITGA3 p.Ala1035Val Uncertain significance ★★ ⚠ same type
ITGA3 p.Arg156Trp Uncertain significance ★★ ⚠ 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/itga3-p-arg38ter (accessed [today's date]).

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