rs147240777

Variant names:

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_StrongBP6BS1

The NM_015474.4(SAMHD1):c.77C>T(p.Pro26Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00045 in 1,614,204 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P26S) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0023 ( 1 hom., cov: 32)

Exomes 𝑓: 0.00025 ( 0 hom. )

Consequence

SAMHD1
NM_015474.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:4

Conservation

PhyloP100: -0.888

Publications

3 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: PanelApp Australia, Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P, Genomics England PanelApp
SAMHD1-related type 1 interferonopathy
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
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: Benign. The variant received -9 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0048927367).

BP6

Variant 20-36951567-G-A is Benign according to our data. Variant chr20-36951567-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 338350.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00234 (357/152376) while in subpopulation AFR AF = 0.00827 (344/41590). AF 95% confidence interval is 0.00755. There are 1 homozygotes in GnomAd4. There are 165 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_015474.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
SAMHD1	NM_015474.4	MANE Select	c.77C>T	p.Pro26Leu	missense	Exon 1 of 16	NP_056289.2
SAMHD1	NM_001363729.2		c.77C>T	p.Pro26Leu	missense	Exon 1 of 15	NP_001350658.1	Q9Y3Z3-4
SAMHD1	NM_001363733.2		c.77C>T	p.Pro26Leu	missense	Exon 1 of 16	NP_001350662.1	A0A2R8YCS7

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
SAMHD1	ENST00000646673.2	MANE Select	c.77C>T	p.Pro26Leu	missense	Exon 1 of 16	ENSP00000493536.2	Q9Y3Z3-1
SAMHD1	ENST00000262878.5	TSL:1	c.77C>T	p.Pro26Leu	missense	Exon 1 of 15	ENSP00000262878.5	Q9Y3Z3-4
SAMHD1	ENST00000866371.1		c.77C>T	p.Pro26Leu	missense	Exon 1 of 17	ENSP00000536430.1

Frequencies

GnomAD3 genomes

AF:

0.00234

AC:

357

AN:

152260

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00830

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000720

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:

0.00

Gnomad OTH

AF:

0.000955

GnomAD2 exomes

AF:

0.000593

AC:

149

AN:

251282

AF XY:

0.000449

show subpopulations

Gnomad AFR exome

AF:

0.00831

Gnomad AMR exome

AF:

0.000376

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000252

AC:

369

AN:

1461828

Hom.:

Cov.:

AF XY:

0.000204

AC XY:

148

AN XY:

727226

show subpopulations

African (AFR)

AF:

0.00881

AC:

295

AN:

33476

American (AMR)

AF:

0.000514

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26128

East Asian (EAS)

AF:

0.00

AC:

AN:

39696

South Asian (SAS)

AF:

0.0000348

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.000347

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.00000180

AC:

AN:

1111974

Other (OTH)

AF:

0.000729

AC:

AN:

60388

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.487

Heterozygous variant carriers

104

130

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

100

<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:

0.00234

AC:

357

AN:

152376

Hom.:

Cov.:

AF XY:

0.00221

AC XY:

165

AN XY:

74522

show subpopulations

African (AFR)

AF:

0.00827

AC:

344

AN:

41590

American (AMR)

AF:

0.000719

AC:

AN:

15308

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5194

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10630

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68034

Other (OTH)

AF:

0.000945

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.494

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

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:

0.000454

Hom.:

Bravo

AF:

0.00268

ESP6500AA

AF:

0.00726

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000700

AC:

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

Aicardi-Goutieres syndrome 5 (2)

Aicardi Goutieres syndrome (1)

Chilblain lupus 2 (1)

not provided (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.081

BayesDel_addAF

Benign

-0.38

BayesDel_noAF

Benign

-0.32

CADD

Benign

7.9

(source)

DANN

Benign

0.89

DEOGEN2

Benign

0.084

Eigen

Benign

-1.3

Eigen_PC

Benign

-1.4

FATHMM_MKL

Benign

0.096

LIST_S2

Benign

0.81

M_CAP

Uncertain

0.099

MetaRNN

Benign

0.0049

MetaSVM

Benign

-0.34

MutationAssessor

Benign

1.7

PhyloP100

-0.89

PrimateAI

Benign

0.33

PROVEAN

Benign

-2.0

REVEL

Benign

0.14

Sift

Uncertain

0.023

Sift4G

Benign

0.11

Polyphen

0.0030

Vest4

0.14

MVP

0.75

MPC

0.62

ClinPred

0.0093

GERP RS

-3.0

PromoterAI

-0.076

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.069

gMVP

0.27

Mutation Taster

=97/3

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over