Is RAG1 p.Ile704= (c.2112C>T) pathogenic?

RAG1 p.Ile704= (c.2112C>T) is classified Likely benign in RAG1 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-03-15). Ultra-rare (popmax 0.0165%, mid); Associated with severe combined immunodeficiency, autosomal recessive, T cell-negative, B cell-negative, NK cell-positive.

How common is RAG1 p.Ile704= (c.2112C>T) in the general population?

RAG1 p.Ile704= (c.2112C>T) is ultra-rare (popmax 0.0165%, mid) (gnomAD).

RAG1 p.Ile704=

Q: What condition is associated with RAG1 p.Ile704= (c.2112C>T)?

RAG1 p.Ile704= (c.2112C>T) is associated with severe combined immunodeficiency, autosomal recessive, T cell-negative, B cell-negative, NK cell-positive, combined immunodeficiency with skin granulomas (ClinVar).

Q: How is Severe combined immunodeficiency due to complete RAG1/2 deficiency inherited?

Typically Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

c.2112C>T · rs904662514 · VCV2941038

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

ultra-rare (popmax 0.0165%, mid)

Conditions

severe combined immunodeficiency, autosomal recessive, T cell-negative, B cell-negative, NK cell-positive

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 1.1	GERP 2, phastCons 1
Overall
CADD	6.427	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0165% Middle Eastern · 1/6,062 alleles

Overall 0.000137% 2/1,461,750 alleles · ultra-rare

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.0165%	6,062
European (non-Finnish)	8.48e-05%	1,179,901

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: RAG1
Protein: p.Ile704=
Coding: c.2112C>T
MANE Select: NM_000448
dbSNP: rs904662514
Type: single nucleotide variant
Location: chr11:36575416 (GRCh38)
Gene constraint: LOEUF 0.703 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 81.68

Full RAG1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

severe combined immunodeficiency, autosomal recessive, T cell-negative, B cell-negative, NK cell-positive — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: combined immunodeficiency with skin granulomas

For Severe combined immunodeficiency due to complete RAG1/2 deficiency (Orphanet):

Inheritance: Autosomal recessive
Onset: Infancy
Prevalence: 1-9 / 100 000 (Europe)

Similar variants

RAG1 p.Ile704Val Uncertain significance ★ ⚠ same residue
RAG1 p.Ala444Val Pathogenic ★★★ same condition
RAG1 p.Arg108Ter Pathogenic ★★★ same condition
RAG1 p.Arg142Ter Pathogenic ★★★ same condition
RAG1 p.Arg394Gln Likely pathogenic ★★★ same condition
RAG1 p.Arg394Trp Pathogenic ★★★ same condition
RAG1 p.Arg396His Pathogenic ★★★ same condition
RAG1 p.Arg404Gln 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/rag1-p-ile704 (accessed [today's date]).

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