Is RAG1 p.Pro85Ser (c.253C>T) pathogenic?

RAG1 p.Pro85Ser (c.253C>T) is classified Uncertain significance in RAG1 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-07-28). AlphaMissense: likely benign (0.082); Absent from gnomAD v4.1; Associated with severe combined immunodeficiency, autosomal recessive, T cell-negative, B cell-negative, NK cell-positive.

How common is RAG1 p.Pro85Ser (c.253C>T) in the general population?

RAG1 p.Pro85Ser (c.253C>T) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about RAG1 p.Pro85Ser (c.253C>T)?

AlphaMissense predicts likely benign (score 0.082) — an in-silico prediction, not a clinical call.

RAG1 p.Pro85Ser

Q: What condition is associated with RAG1 p.Pro85Ser (c.253C>T)?

RAG1 p.Pro85Ser (c.253C>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.253C>T · rs754321019 · VCV1371477

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.082 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

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

Computational evidence

Protein change
AlphaMissense	0.082	likely benign
REVEL	0.032	moderately benign-leaning
SaProt	LLR -5.73	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 0.99	GERP 0.66, phastCons 0.19
Regional constraint	o/e 1.10	unconstrained · MANE · 814 bp · p 0.066 · regional, not allelic
Overall
CADD	9.602	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

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: RAG1
Protein: p.Pro85Ser
Coding: c.253C>T
MANE Select: NM_000448
dbSNP: rs754321019
Type: single nucleotide variant
Location: chr11:36573557 (GRCh38)
Gene constraint: LOEUF 0.703 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 81.68
Residue 85: the 'interaction with importin alpha-1' region

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.Pro85Ala 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-pro85ser (accessed [today's date]).

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