rs267607027

Variant names:

Your query was ambiguous. Multiple possible variants found:

Variant summary

Our verdict is Pathogenic. The variant received 16 ACMG points: 16P and 0B. PVS1PP5_Very_Strong

The NM_015474.4(SAMHD1):c.490C>T(p.Arg164*) variant causes a stop gained change. The variant allele was found at a frequency of 0.00000558 in 1,613,890 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Synonymous variant affecting the same amino acid position (i.e. R164R) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 31)

Exomes 𝑓: 0.0000055 ( 0 hom. )

Consequence

SAMHD1
NM_015474.4 stop_gained

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:5

Conservation

PhyloP100: 5.63

Publications

14 publications found

Variant links:

Genes affected

SAMHD1 (HGNC:15925): (SAM and HD domain containing deoxynucleoside triphosphate triphosphohydrolase 1) This gene may play a role in regulation of the innate immune response. The encoded protein is upregulated in response to viral infection and may be involved in mediation of tumor necrosis factor-alpha proinflammatory responses. Mutations in this gene have been associated with Aicardi-Goutieres syndrome. [provided by RefSeq, Mar 2010]

SAMHD1 Gene-Disease associations (from GenCC):

Aicardi-Goutieres syndrome 5
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, PanelApp Australia, Labcorp Genetics (formerly Invitae), Genomics England PanelApp, G2P
Moyamoya disease
Inheritance: AR Classification: STRONG Submitted by: Genomics England PanelApp
Aicardi-Goutieres syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
familial chilblain lupus
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
chilblain lupus 2
Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
chilblain lupus
Inheritance: AD Classification: NO_KNOWN Submitted by: Illumina

SAMHD1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 16 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PP5

Variant 20-36935048-G-A is Pathogenic according to our data. Variant chr20-36935048-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 4069.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SAMHD1	NM_015474.4 link	c.490C>T	p.Arg164*	stop_gained	Exon 4 of 16	ENST00000646673.2	NP_056289.2	Q9Y3Z3-1Q59H15
SAMHD1	NM_001363729.2 link	c.490C>T	p.Arg164*	stop_gained	Exon 4 of 15		NP_001350658.1
SAMHD1	NM_001363733.2 link	c.490C>T	p.Arg164*	stop_gained	Exon 4 of 16		NP_001350662.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SAMHD1	ENST00000646673.2 link	c.490C>T	p.Arg164*	stop_gained	Exon 4 of 16		NM_015474.4	ENSP00000493536.2		Q9Y3Z3-1

Frequencies

GnomAD3 genomes

AF:

0.00000658

AC:

AN:

152066

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:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.00000398

AC:

AN:

251460

AF XY:

0.00000736

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000879

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000547

AC:

AN:

1461824

Hom.:

Cov.:

AF XY:

0.00000550

AC XY:

AN XY:

727216

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26134

East Asian (EAS)

AF:

0.00

AC:

AN:

39694

South Asian (SAS)

AF:

0.00

AC:

AN:

86252

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53414

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000630

AC:

AN:

1111964

Other (OTH)

AF:

0.0000166

AC:

AN:

60394

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.463

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.00000658

AC:

AN:

152066

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74256

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41396

American (AMR)

AF:

0.00

AC:

AN:

15222

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3460

East Asian (EAS)

AF:

0.00

AC:

AN:

5200

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10596

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

68042

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000756

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Aicardi-Goutieres syndrome 5

Pathogenic:3

Feb 29, 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.Arg164*) in the SAMHD1 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in SAMHD1 are known to be pathogenic (PMID: 19525956, 22461318). This variant is present in population databases (rs267607027, gnomAD 0.0009%). This premature translational stop signal has been observed in individual(s) with Aicardi-Goutieres syndrome (PMID: 20842748, 22174685). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 4069). For these reasons, this variant has been classified as Pathogenic. -

Dec 03, 2018

Broad Center for Mendelian Genomics, Broad Institute of MIT and Harvard

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:research

The homozygous p.Arg164Ter variant in SAMHD1 was identified by our study in two unrelated individuals with Aicardi-Goutieres syndrome. This variant was absent from large population studies and has been reported pathogenic by OMIM in ClinVar (Variation ID: 4069). The p.Arg164Ter variant in SAMHD1 has been reported in 6 individuals (including 4 Turkish siblings with the variant in the homozygous state and 2 siblings with a Maltese father and the variant in the compound heterozygous state) with Aicardi-Goutieres syndrome and segregated with disease in all 6 affected relatives from 2 families (PMID: 22174685, 20842748). The presence of this variant in combination with a variant reported pathogenic by OMIM in ClinVar (Variation ID: 4067) and in two siblings with Aicardi-Goutieres syndrome increases the likelihood that the p.Arg164Ter variant is pathogenic (PMID: 20358604). This nonsense variant leads to a premature termination codon at position 164, which is predicted to lead to a truncated or absent protein. At least two loss of function variants across multiple exons have been reported in association with Aicardi-Goutieres in ClinVar. Loss of function of the SAMHD1 gene is a moderately established disease mechanism in autosomal recessive Aicardi-Goutieres syndrome. In summary, although additional studies are required to fully establish its clinical significance, this variant is likely pathogenic. ACMG/AMP Criteria applied: PM2, PVS1_Moderate, PP1, PM3_Supporting (Richards 2015). -

Apr 01, 2010

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

- -

Aicardi Goutieres syndrome

Pathogenic:1

Oct 19, 2020

Natera, Inc.

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Aicardi-Goutieres syndrome 5;C3280721:Chilblain lupus 2

Pathogenic:1

May 29, 2024

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

0.63

BayesDel_noAF

Pathogenic

0.63

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

Eigen

Pathogenic

0.76

Eigen_PC

Uncertain

0.63

FATHMM_MKL

Uncertain

0.96

PhyloP100

5.6

Vest4

0.98

GERP RS

4.1

Mutation Taster

=1/199

disease causing (ClinVar)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.23

Details are displayed if max score is > 0.2

DS_DL_spliceai

0.23

Position offset: -19

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

Publications

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

rs267607027

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