rs150681002

Variant names:

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_StrongBP6BS2

The NM_001122752.2(SERPINI1):c.248A>T(p.Asn83Ile) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000452 in 1,614,030 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 19/24 in silico tools predict a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00026 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000023 ( 0 hom. )

Consequence

SERPINI1
NM_001122752.2 missense, splice_region

Scores

Splicing: ADA: 0.0001952

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:1

Conservation

PhyloP100: 0.768

Publications

0 publications found

Variant links:

Genes affected

SERPINI1 (HGNC:8943): (serpin family I member 1) This gene encodes a member of the serpin superfamily of serine proteinase inhibitors. The protein is primarily secreted by axons in the brain, and preferentially reacts with and inhibits tissue-type plasminogen activator. It is thought to play a role in the regulation of axonal growth and the development of synaptic plasticity. Mutations in this gene result in familial encephalopathy with neuroserpin inclusion bodies (FENIB), which is a dominantly inherited form of familial encephalopathy and epilepsy characterized by the accumulation of mutant neuroserpin polymers. Multiple alternatively spliced variants, encoding the same protein, have been identified. [provided by RefSeq, Jul 2008]

SERPINI1 Gene-Disease associations (from GenCC):

progressive myoclonus epilepsy
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
familial encephalopathy with neuroserpin inclusion bodies
Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Ambry Genetics, Labcorp Genetics (formerly Invitae)

SERPINI1 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=0.029649585).

BP6

Variant 3-167789376-A-T is Benign according to our data. Variant chr3-167789376-A-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 534956.

BS2

High AC in GnomAd4 at 40 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein
SERPINI1	NM_001122752.2 link	c.248A>T	p.Asn83Ile	missense_variant, splice_region_variant	Exon 2 of 9	ENST00000446050.7	NP_001116224.1
SERPINI1	NM_005025.5 link	c.248A>T	p.Asn83Ile	missense_variant, splice_region_variant	Exon 2 of 9		NP_005016.1
SERPINI1	XM_017006618.3 link	c.248A>T	p.Asn83Ile	missense_variant, splice_region_variant	Exon 2 of 9		XP_016862107.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein
SERPINI1	ENST00000446050.7 link	c.248A>T	p.Asn83Ile	missense_variant, splice_region_variant	Exon 2 of 9	1	NM_001122752.2	ENSP00000397373.2
SERPINI1	ENST00000295777.9 link	c.248A>T	p.Asn83Ile	missense_variant, splice_region_variant	Exon 2 of 9	1		ENSP00000295777.5
SERPINI1	ENST00000472747.2 link	c.248A>T	p.Asn83Ile	missense_variant, splice_region_variant	Exon 2 of 5	3		ENSP00000420561.2
SERPINI1	ENST00000472941.5 link	c.248A>T	p.Asn83Ile	missense_variant, splice_region_variant	Exon 2 of 3	3		ENSP00000420133.1

Frequencies

GnomAD3 genomes

AF:

0.000263

AC:

AN:

152252

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000772

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000458

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:

0.000478

GnomAD2 exomes

AF:

0.0000677

AC:

AN:

250990

AF XY:

0.0000442

show subpopulations

Gnomad AFR exome

AF:

0.000744

Gnomad AMR exome

AF:

0.000116

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000881

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000226

AC:

AN:

1461660

Hom.:

Cov.:

AF XY:

0.0000220

AC XY:

AN XY:

727124

show subpopulations

African (AFR)

AF:

0.000597

AC:

AN:

33476

American (AMR)

AF:

0.000157

AC:

AN:

44718

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26128

East Asian (EAS)

AF:

0.00

AC:

AN:

39690

South Asian (SAS)

AF:

0.00

AC:

AN:

86248

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53390

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000180

AC:

AN:

1111868

Other (OTH)

AF:

0.0000663

AC:

AN:

60374

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.495

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:

0.000263

AC:

AN:

152370

Hom.:

Cov.:

AF XY:

0.000295

AC XY:

AN XY:

74518

show subpopulations

African (AFR)

AF:

0.000769

AC:

AN:

41596

American (AMR)

AF:

0.000457

AC:

AN:

15308

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5182

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10632

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68034

Other (OTH)

AF:

0.000473

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.518

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:

0.000142

Hom.:

Bravo

AF:

0.000355

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000988

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Familial encephalopathy with neuroserpin inclusion bodies

Uncertain:2

Oct 16, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces asparagine, which is neutral and polar, with isoleucine, which is neutral and non-polar, at codon 83 of the SERPINI1 protein (p.Asn83Ile). This variant is present in population databases (rs150681002, gnomAD 0.07%), and has an allele count higher than expected for a pathogenic variant. This variant has not been reported in the literature in individuals affected with SERPINI1-related conditions. ClinVar contains an entry for this variant (Variation ID: 534956). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant¬†is likely to be tolerated. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Apr 12, 2023

Revvity Omics, Revvity

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Inborn genetic diseases

Benign:1

Apr 09, 2024

Ambry Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.15

BayesDel_addAF

Benign

-0.31

BayesDel_noAF

Benign

-0.30

CADD

Benign

(source)

DANN

Benign

0.92

DEOGEN2

Benign

0.098

T;T;T;T

Eigen

Benign

-0.52

Eigen_PC

Benign

-0.46

FATHMM_MKL

Uncertain

0.93

LIST_S2

Benign

0.63

T;.;T;T

M_CAP

Benign

0.068

MetaRNN

Benign

0.030

T;T;T;T

MetaSVM

Benign

-0.52

MutationAssessor

Benign

0.75

.;N;N;.

PhyloP100

0.77

PrimateAI

Benign

0.31

PROVEAN

Benign

-0.84

N;N;N;N

REVEL

Benign

0.15

Sift

Benign

0.22

T;T;T;T

Sift4G

Uncertain

0.010

D;T;T;T

Polyphen

0.16

.;B;B;.

Vest4

0.21, 0.21

MVP

0.44

MPC

0.16

ClinPred

0.0092

GERP RS

1.4

Varity_R

0.39

gMVP

0.27

Mutation Taster

=81/19

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.00020

dbscSNV1_RF

Benign

0.078

SpliceAI score (max)

0.060

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