rs193922573

Positions:

chr11-36592860-C-T

Variant summary

Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PP4PM2_SupportingPS3_ModeratePM1PM3

This summary comes from the ClinGen Evidence Repository: The c.1309G>A (NM_000536.4) variant in RAG2 is a missense variant predicted to cause the substitution of Glutamic Acid by Lysine at amino acid 437 (p.Glu437Lys).The filtering allele frequency (the upper threshold of the 95% CI of 9/63722 alleles) of the c.1309G>A variant in RAG2 is 0.000001910 for European (non-Finnish) chromosomes by gnomAD v.4, which is lower than the ClinGen SCID VCEP threshold (<0.0000588) for PM2_Supporting, and therefore meets this criterion (PM2_Supporting). No homozygotes have been observed in gnomAD.This variant is located in the PHD domain, amino acids 414-487 of RAG2, which is defined as a critical functional domain by the ClinGen SCID VCEP (PMID:26996199); PM1.The recombination activity assay showed activity of this variant compared to wildtype RAG2 is 0.9% (SEM 0.2), which is lower than the SCID VCEP threshold (<25%) for PS3_Moderate, meeting this criterion (PS3_Moderate, PMID 29772310).The patient presents: Diagnostic criteria for SCID/Leaky SCID/Omenn syndrome met 0.5 pts + T-B-NK+ lymphocyte subset profile 0.5 pts, total is 1 point, PP4 (PMID:29772310). The same patient is a compound heterozygous for his variant and G35A, a pathogenic variant according to SCID VCEP specifications; 1 point, PM3.In summary, this variant meets the criteria to be classified as Likely Pathogenic for autosomal recessive recombinase activating gene 2 deficiency based on the ACMG/AMP criteria applied, as specified by the ClinGen SCID VCEP. Criteria applied: PM2_Supporting, PM1, PS3_Moderate, PP4, and PM3 (VCEP specifications version 1.0). LINK:https://erepo.genome.network/evrepo/ui/classification/CA214215/MONDO:0000573/124

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000068 ( 0 hom. )

Consequence

RAG2
NM_000536.4 missense

Scores

Clinical Significance

Likely pathogenic reviewed by expert panel P:3U:2

Conservation

PhyloP100: 7.50

Variant links:

Genes affected

RAG2 (HGNC:9832): (recombination activating 2) This gene encodes a protein that is involved in the initiation of V(D)J recombination during B and T cell development. This protein forms a complex with the product of the adjacent recombination activating gene 1, and this complex can form double-strand breaks by cleaving DNA at conserved recombination signal sequences. The recombination activating gene 1 component is thought to contain most of the catalytic activity, while the N-terminal of the recombination activating gene 2 component is thought to form a six-bladed propeller in the active core that serves as a binding scaffold for the tight association of the complex with DNA. A C-terminal plant homeodomain finger-like motif in this protein is necessary for interactions with chromatin components, specifically with histone H3 that is trimethylated at lysine 4. Mutations in this gene cause Omenn syndrome, a form of severe combined immunodeficiency associated with autoimmune-like symptoms. [provided by RefSeq, Jul 2008]

RAG2 links:

RAG1 (HGNC:9831): (recombination activating 1) The protein encoded by this gene is involved in activation of immunoglobulin V-D-J recombination. The encoded protein is involved in recognition of the DNA substrate, but stable binding and cleavage activity also requires RAG2. Defects in this gene can be the cause of several diseases. [provided by RefSeq, Jul 2008]

RAG1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 8 ACMG points.

PS3

PM1

PM2

PM3

PP4

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RAG2	NM_000536.4 linkuse as main transcript	c.1309G>A	p.Glu437Lys	missense_variant	2/2	ENST00000311485.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RAG2	ENST00000311485.8 linkuse as main transcript	c.1309G>A	p.Glu437Lys	missense_variant	2/2	1	NM_000536.4	P1

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152092

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000944

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000795

AC:

AN:

251446

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

135906

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000925

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000684

AC:

AN:

1461870

Hom.:

Cov.:

AF XY:

0.00000963

AC XY:

AN XY:

727242

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.000150

Gnomad4 NFE exome

AF:

0.00000180

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152092

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74276

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.0000944

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000329

Hom.:

Bravo

AF:

0.0000113

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:3Uncertain:2

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

Combined immunodeficiency with skin granulomas

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Baylor Genetics

Feb 21, 2023

- -

Recombinase activating gene 2 deficiency

Pathogenic:1

Likely pathogenic, reviewed by expert panel

curation

ClinGen Severe Combined Immunodeficiency Variant Curation Expert Panel, ClinGen

Apr 01, 2024

The c.1309G>A (NM_000536.4) variant in RAG2 is a missense variant predicted to cause the substitution of Glutamic Acid by Lysine at amino acid 437 (p.Glu437Lys). The filtering allele frequency (the upper threshold of the 95% CI of 9/63722 alleles) of the c.1309G>A variant in RAG2 is 0.000001910 for European (non-Finnish) chromosomes by gnomAD v.4, which is lower than the ClinGen SCID VCEP threshold (<0.0000588) for PM2_Supporting, and therefore meets this criterion (PM2_Supporting). No homozygotes have been observed in gnomAD. This variant is located in the PHD domain, amino acids 414-487 of RAG2, which is defined as a critical functional domain by the ClinGen SCID VCEP (PMID: 26996199); PM1. The recombination activity assay showed activity of this variant compared to wildtype RAG2 is 0.9% (SEM 0.2), which is lower than the SCID VCEP threshold (<25%) for PS3_Moderate, meeting this criterion (PS3_Moderate, PMID 29772310). The patient presents: Diagnostic criteria for SCID/Leaky SCID/Omenn syndrome met 0.5 pts + T-B-NK+ lymphocyte subset profile 0.5 pts, total is 1 point, PP4 (PMID: 29772310). The same patient is a compound heterozygous for his variant and G35A, a pathogenic variant according to SCID VCEP specifications; 1 point, PM3. In summary, this variant meets the criteria to be classified as Likely Pathogenic for autosomal recessive recombinase activating gene 2 deficiency based on the ACMG/AMP criteria applied, as specified by the ClinGen SCID VCEP. Criteria applied: PM2_Supporting, PM1, PS3_Moderate, PP4, and PM3 (VCEP specifications version 1.0). -

not provided

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

GeneDx

Dec 21, 2015

The E437K variant in the RAG2 gene has not been reported previously as a pathogenic variant, nor as a benign variant, to our knowledge. The E437K variant was not observed at any significant frequency in approximately 6500 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, indicating it is not a common benign variant in these populations. The E437K variant is a non-conservative amino acid substitution, which is likely to impact secondary protein structure as these residues differ in polarity, charge, size and/or other properties. This substitution occurs at a position that is conserved across species. In silico analysis predicts this variant is probably damaging to the protein structure/function. A missense variant in nearby residue (K440N) has been reported in the Human Gene Mutation Database in association with Omenn syndrome (Stenson et al., 2014), supporting the functional importance of this region of the protein. The E437K variant is a strong candidate for a pathogenic variant, however the possibility it may be a rare benign variant cannot be excluded. -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

May 10, 2018

Variant summary: RAG2 c.1309G>A (p.Glu437Lys) results in a conservative amino acid change located in the Recombination activating protein 2 PHD domain (IPR025162) of the encoded protein sequence. Four of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 1.6e-05 in 246216 control chromosomes (gnomAD). This frequency is not significantly higher than expected for a pathogenic variant in RAG2 causing Severe Combined Immunodeficiency Syndrome (1.6e-05 vs 7.10e-04), allowing no conclusion about variant significance. The variant, c.1309G>A, has been reported in the literature and an unpublished report in individuals affected with Severe Combined Immunodeficiency Syndrome (Nicholas_2011, Dobbs_2017) as well as in a case of common variable immunodeficiency (CVID) (Yashar_2016). These data indicate that the variant may be associated with disease. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. One clinical diagnostic laboratory has submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. One laboratory classified the variant as likely pathogenic. Based on the evidence outlined above, the variant was classified as VUS-possibly pathogenic. -

Inborn error of immunity;CN257931:Recombinase activating gene 2 deficiency;na:Atypical severe combined immunodeficiency due to complete RAG1/2 deficiency

Uncertain:1

Uncertain significance, criteria provided, single submitter

research

Pediatric Immunology Service, The Chaim Sheba Medical Center at Tel HaShomer

Mar 06, 2018

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.84

BayesDel_addAF

Pathogenic

0.49

BayesDel_noAF

Pathogenic

0.47

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.63

D;D

Eigen

Pathogenic

0.86

Eigen_PC

Pathogenic

0.80

FATHMM_MKL

Pathogenic

0.98

M_CAP

Uncertain

0.28

MetaRNN

Pathogenic

0.90

D;D

MetaSVM

Pathogenic

1.1

MutationAssessor

Uncertain

2.1

M;M

MutationTaster

Benign

1.0

PrimateAI

Uncertain

0.73

PROVEAN

Benign

-1.1

N;.

REVEL

Pathogenic

0.88

Sift

Pathogenic

0.0

D;.

Sift4G

Pathogenic

0.0

D;D

Polyphen

0.99

D;D

Vest4

0.82

MVP

0.97

MPC

0.47

ClinPred

0.97

GERP RS

5.4

Varity_R

0.65

gMVP

0.82

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over