Genetic Variant SIPA1:p.Arg47Trp (chr11-65641060-C-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_006747.4(SIPA1):c.139C>T(p.Arg47Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000332 in 1,597,966 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00011 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000026 ( 0 hom. )

Consequence

SIPA1
NM_006747.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.157

Publications

2 publications found

Variant links:

Genes affected

SIPA1 (HGNC:10885): (signal-induced proliferation-associated 1) The product of this gene is a mitogen induced GTPase activating protein (GAP). It exhibits a specific GAP activity for Ras-related regulatory proteins Rap1 and Rap2, but not for Ran or other small GTPases. This protein may also hamper mitogen-induced cell cycle progression when abnormally or prematurely expressed. It is localized to the perinuclear region. Two alternatively spliced variants encoding the same isoform have been characterized to date. [provided by RefSeq, Jul 2008]

SIPA1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.079568416).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SIPA1	NM_006747.4 link	c.139C>T	p.Arg47Trp	missense_variant	Exon 2 of 16	ENST00000534313.6	NP_006738.3	Q96FS4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SIPA1	ENST00000534313.6 link	c.139C>T	p.Arg47Trp	missense_variant	Exon 2 of 16	1	NM_006747.4	ENSP00000436269.1		Q96FS4

Frequencies

GnomAD3 genomes

AF:

0.000105

AC:

AN:

152140

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000338

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000839

AC:

AN:

214552

AF XY:

0.0000336

show subpopulations

Gnomad AFR exome

AF:

0.000155

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000952

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000256

AC:

AN:

1445708

Hom.:

Cov.:

AF XY:

0.0000223

AC XY:

AN XY:

719078

show subpopulations

African (AFR)

AF:

0.000150

AC:

AN:

33308

American (AMR)

AF:

0.00

AC:

AN:

43312

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25852

East Asian (EAS)

AF:

0.000432

AC:

AN:

39396

South Asian (SAS)

AF:

0.0000350

AC:

AN:

85614

European-Finnish (FIN)

AF:

0.00

AC:

AN:

44232

Middle Eastern (MID)

AF:

0.000178

AC:

AN:

5620

European-Non Finnish (NFE)

AF:

0.00000812

AC:

AN:

1108434

Other (OTH)

AF:

0.0000334

AC:

AN:

59940

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.482

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.000105

AC:

AN:

152258

Hom.:

Cov.:

AF XY:

0.000107

AC XY:

AN XY:

74442

show subpopulations

African (AFR)

AF:

0.000337

AC:

AN:

41562

American (AMR)

AF:

0.00

AC:

AN:

15296

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5164

South Asian (SAS)

AF:

0.000208

AC:

AN:

4816

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10614

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

68020

Other (OTH)

AF:

0.00

AC:

AN:

2108

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.503

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.000106

ExAC

AF:

0.0000677

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jul 20, 2021

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.139C>T (p.R47W) alteration is located in exon 2 (coding exon 1) of the SIPA1 gene. This alteration results from a C to T substitution at nucleotide position 139, causing the arginine (R) at amino acid position 47 to be replaced by a tryptophan (W). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.14

BayesDel_addAF

Benign

-0.26

BayesDel_noAF

Benign

-0.21

CADD

Benign

(source)

DANN

Benign

0.93

DEOGEN2

Uncertain

0.44

T;.;T;T

Eigen

Benign

-0.36

Eigen_PC

Benign

-0.29

FATHMM_MKL

Benign

0.34

LIST_S2

Benign

0.81

.;T;T;T

M_CAP

Uncertain

0.24

MetaRNN

Benign

0.080

T;T;T;T

MetaSVM

Benign

-0.49

MutationAssessor

Benign

1.9

M;.;.;M

PhyloP100

-0.16

PrimateAI

Pathogenic

0.92

PROVEAN

Uncertain

-3.4

D;D;D;D

REVEL

Benign

0.18

Sift

Benign

0.042

D;T;D;D

Sift4G

Uncertain

0.045

D;D;D;D

Polyphen

0.013

B;.;B;B

Vest4

0.20

MutPred

0.36

Loss of methylation at R47 (P = 0.0306);Loss of methylation at R47 (P = 0.0306);Loss of methylation at R47 (P = 0.0306);Loss of methylation at R47 (P = 0.0306);

MVP

0.82

MPC

0.64

ClinPred

0.032

GERP RS

2.1

Varity_R

0.070

gMVP

0.46

Mutation Taster

=94/6

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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chr11-65641060-C-T

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