10-14945110-G-A

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 13 ACMG points: 13P and 0B. PVS1PP4PS3_ModeratePM2_SupportingPM3_Supporting

This summary comes from the ClinGen Evidence Repository: The NM_001033855.3:c.241C>T (p.Arg81Ter) variant in DCLRE1C is a nonsense variant predicted to cause a premature stop codon in biologically relevant exon, 3/14, which is predicted to lead to nonsense-mediated decay in a gene in which loss-of-function is an established disease mechanism (PVS1).The filtering allele frequency (the upper threshold of the 95% CI of 38/1177816 alleles) of the c.241C>T variant in DCLRE1C is 0.00002205 for European (non-Finnish) chromosomes by gnomAD v4, which is lower than the ClinGen SCID VCEP threshold (<0.00003266) for PM2_Supporting, and therefore meets this criterion (PM2_Supporting).Activity levels in % of WT activity = Recombination: Mean (SD): 19.48 (1.56) and DNA repair (36h after IR): Mean (SD): 16.05 (4.77). Both values are lower than our established threshold for abnormal results (defined as <25% of wild-type activity). Thus, PS3 is Met at a moderate level. (PMID:25917813).At least one patient with this variant displayed Diagnostic criteria for SCID/Leaky SCID/Omenn syndrome 0.5pts + T-B-NK+ lymphocyte subset profile 0.5pts; the total is 1 point, which is highly specific for SCID (PP4_Supporting, PMID:11336668). The proband (P2) is homozygous (Table 1) for this variant (0.5pt; PM3_Supporting).In summary, this variant meets the criteria to be classified as Pathogenic for autosomal recessive severe combined immunodeficiency due to DCLRE1C deficiency based on the ACMG/AMP criteria applied, as specified by the ClinGen SCID VCEP: PVS1, PM2_Supporting, PM3_Supporting, PS3_Moderate, and PP4_Supporting (VCEP specifications version 1). LINK:https://erepo.genome.network/evrepo/ui/classification/CA117001/MONDO:0011225/116

Frequency

Genomes: 𝑓 0.000040 ( 0 hom., cov: 30)

Exomes 𝑓: 0.000026 ( 0 hom. )

Consequence

DCLRE1C
NM_001033855.3 stop_gained

Scores

Clinical Significance

Pathogenic reviewed by expert panel P:11

Conservation

PhyloP100: 0.800

Publications

8 publications found

Variant links:

Genes affected

DCLRE1C (HGNC:17642): (DNA cross-link repair 1C) This gene encodes a nuclear protein that is involved in V(D)J recombination and DNA repair. The encoded protein has single-strand-specific 5'-3' exonuclease activity; it also exhibits endonuclease activity on 5' and 3' overhangs and hairpins. The protein also functions in the regulation of the cell cycle in response to DNA damage. Mutations in this gene can cause Athabascan-type severe combined immunodeficiency (SCIDA) and Omenn syndrome. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2014]

DCLRE1C Gene-Disease associations (from GenCC):

Omenn syndrome
Inheritance: AR Classification: DEFINITIVE, SUPPORTIVE, LIMITED Submitted by: G2P, Ambry Genetics, Orphanet
severe combined immunodeficiency due to DCLRE1C deficiency
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, Ambry Genetics, ClinGen

DCLRE1C links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 13 ACMG points.

PVS1

For more information check the summary or visit ClinGen Evidence Repository.

PS3

For more information check the summary or visit ClinGen Evidence Repository.

PM2

For more information check the summary or visit ClinGen Evidence Repository.

PM3

For more information check the summary or visit ClinGen Evidence Repository.

PP4

For more information check the summary or visit ClinGen Evidence Repository.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DCLRE1C	NM_001033855.3 link	c.241C>T	p.Arg81*	stop_gained	Exon 3 of 14	ENST00000378278.7	NP_001029027.1	Q96SD1-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DCLRE1C	ENST00000378278.7 link	c.241C>T	p.Arg81*	stop_gained	Exon 3 of 14	1	NM_001033855.3	ENSP00000367527.2		Q96SD1-1

Frequencies

GnomAD3 genomes

AF:

0.0000395

AC:

AN:

151828

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000657

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000588

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000120

AC:

AN:

250582

AF XY:

0.0000148

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000580

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000882

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000261

AC:

AN:

1457934

Hom.:

Cov.:

AF XY:

0.0000276

AC XY:

AN XY:

725178

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33362

American (AMR)

AF:

0.0000673

AC:

AN:

44594

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26066

East Asian (EAS)

AF:

0.00

AC:

AN:

39538

South Asian (SAS)

AF:

0.00

AC:

AN:

85506

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53258

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5574

European-Non Finnish (NFE)

AF:

0.0000306

AC:

AN:

1109836

Other (OTH)

AF:

0.0000166

AC:

AN:

60200

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.478

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000395

AC:

AN:

151828

Hom.:

Cov.:

AF XY:

0.0000540

AC XY:

AN XY:

74140

show subpopulations

African (AFR)

AF:

0.0000242

AC:

AN:

41318

American (AMR)

AF:

0.0000657

AC:

AN:

15218

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5194

South Asian (SAS)

AF:

0.00

AC:

AN:

4808

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10528

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000588

AC:

AN:

67980

Other (OTH)

AF:

0.00

AC:

AN:

2086

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.550

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0000664

Hom.:

Bravo

AF:

0.0000453

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:11

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

Severe combined immunodeficiency due to DCLRE1C deficiency

Pathogenic:4

Apr 20, 2001

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

- -

Dec 31, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change creates a premature translational stop signal (p.Arg81*) in the DCLRE1C gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in DCLRE1C are known to be pathogenic (PMID: 21664875, 26123418). This variant is present in population databases (rs121908156, gnomAD 0.006%). This premature translational stop signal has been observed in individuals with severe combined immune deficiency (PMID: 11336668, 25917813). This variant is also known as R74X. ClinVar contains an entry for this variant (Variation ID: 4665). For these reasons, this variant has been classified as Pathogenic. -

Jan 23, 2024

ClinGen Severe Combined Immunodeficiency Variant Curation Expert Panel, ClinGen

Significance:Pathogenic

Review Status:reviewed by expert panel

Collection Method:curation

The NM_001033855.3:c.241C>T (p.Arg81Ter) variant in DCLRE1C is a nonsense variant predicted to cause a premature stop codon in biologically relevant exon, 3/14, which is predicted to lead to nonsense-mediated decay in a gene in which loss-of-function is an established disease mechanism (PVS1). The filtering allele frequency (the upper threshold of the 95% CI of 38/1177816 alleles) of the c.241C>T variant in DCLRE1C is 0.00002205 for European (non-Finnish) chromosomes by gnomAD v4, which is lower than the ClinGen SCID VCEP threshold (<0.00003266) for PM2_Supporting, and therefore meets this criterion (PM2_Supporting). Activity levels in % of WT activity = Recombination: Mean (SD): 19.48 (1.56) and DNA repair (36h after IR): Mean (SD): 16.05 (4.77). Both values are lower than our established threshold for abnormal results (defined as <25% of wild-type activity). Thus, PS3 is Met at a moderate level. (PMID: 25917813). At least one patient with this variant displayed Diagnostic criteria for SCID/Leaky SCID/Omenn syndrome 0.5pts + T-B-NK+ lymphocyte subset profile 0.5pts; the total is 1 point, which is highly specific for SCID (PP4_Supporting, PMID: 11336668). The proband (P2) is homozygous (Table 1) for this variant (0.5pt; PM3_Supporting). In summary, this variant meets the criteria to be classified as Pathogenic for autosomal recessive severe combined immunodeficiency due to DCLRE1C deficiency based on the ACMG/AMP criteria applied, as specified by the ClinGen SCID VCEP: PVS1, PM2_Supporting, PM3_Supporting, PS3_Moderate, and PP4_Supporting (VCEP specifications version 1). -

Jun 16, 2023

Genomic Medicine Lab, University of California San Francisco

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Histiocytic medullary reticulosis

Pathogenic:2

Sep 16, 2020

Natera, Inc.

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Mar 28, 2024

Baylor Genetics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Pathogenic:2

Oct 02, 2014

Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Feb 02, 2023

GeneDx

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Nonsense variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss-of-function is a known mechanism of disease; Published functional studies demonstrate a damaging effect, including significantly reduced protein activity (Felgentreff et al., 2015); This variant is associated with the following publications: (PMID: 30947698, 25525159, 31589614, 25917813, 11336668, 30625039, 35503492) -

DCLRE1C-related disorder

Pathogenic:1

Dec 20, 2024

Greenwood Genetic Center Diagnostic Laboratories, Greenwood Genetic Center

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

PVS1, PS3_Moderate, PS3_Supporting, PM2_Supporting, PP4 -

Severe combined immunodeficiency disease

Pathogenic:1

Dec 07, 2023

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

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant summary: DCLRE1C c.241C>T (p.Arg81X) results in a premature termination codon, predicted to cause a truncation of the encoded protein or absence of the protein due to nonsense mediated decay, which are commonly known mechanisms for disease. The variant allele was found at a frequency of 1.2e-05 in 250582 control chromosomes (gnomAD). c.241C>T has been reported in the literature in individuals affected with Severe Combined Immunodeficiency (example: Moshous_2001). These data indicate that the variant is likely to be associated with disease. At least one publication reports experimental evidence that this variant impairs normal protein activity (Moshous_2001). The following publications have been ascertained in the context of this evaluation (PMID: 11336668, 12727634). Four submitters have cited clinical-significance assessments for this variant to ClinVar after 2014. All submitters classified the variant as pathogenic. Based on the evidence outlined above, the variant was classified as pathogenic. -

Severe combined immunodeficiency due to DCLRE1C deficiency;C2700553:Histiocytic medullary reticulosis

Pathogenic:1

Oct 31, 2018

Fulgent Genetics, Fulgent Genetics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.50

BayesDel_noAF

Pathogenic

0.55

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

Eigen

Uncertain

0.58

Eigen_PC

Uncertain

0.39

FATHMM_MKL

Benign

0.69

PhyloP100

0.80

Vest4

0.87

GERP RS

2.2

Mutation Taster

=0/200

disease causing (ClinVar)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

Splicevardb

1.0

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over