Variant 18-63981776-T-G details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2PP3_Strong

The NM_001348370.2(SERPINB8):c.-36T>G variant causes a 5 prime UTR premature start codon gain change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000164 in 1,461,686 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 Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.000016 ( 0 hom. )

Consequence

SERPINB8
NM_001348370.2 5_prime_UTR_premature_start_codon_gain

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.90

Variant links:

Genes affected

SERPINB8 (HGNC:8952): (serpin family B member 8) The protein encoded by this gene is a member of the ov-serpin family of serine protease inhibitors. The encoded protein is produced by platelets and can bind to and inhibit the function of furin, a serine protease involved in platelet functions. In addition, this protein has been found to enhance the mechanical stability of cell-cell adhesion in the skin, and defects in this gene have been associated with an autosomal-recessive form of exfoliative ichthyosis. [provided by RefSeq, Jan 2017]

SERPINB8 links:

HMSD (HGNC:23037): (histocompatibility minor serpin domain containing) This gene encodes a serpin-domain containing protein that may function as a serine protease inhibitor. This gene is primarily expressed in cells of myeloid lineage. A polymorphism in this gene may result in the expression a splice variant that encodes a minor histocompatibility antigen. [provided by RefSeq, Oct 2010]

HMSD links:

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ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.985

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SERPINB8	NM_002640.4 link	c.362T>G	p.Phe121Cys	missense_variant	Exon 4 of 7	ENST00000397985.7	NP_002631.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SERPINB8	ENST00000397985.7 link	c.362T>G	p.Phe121Cys	missense_variant	Exon 4 of 7	1	NM_002640.4	ENSP00000381072.2		P50452-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000119

AC:

AN:

251346

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

135846

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 SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000264

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000164

AC:

AN:

1461686

Hom.:

Cov.:

AF XY:

0.0000179

AC XY:

AN XY:

727144

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000207

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000371

Hom.:

Bravo

AF:

0.00000756

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00

AC:

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

May 24, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.362T>G (p.F121C) alteration is located in exon 4 (coding exon 3) of the SERPINB8 gene. This alteration results from a T to G substitution at nucleotide position 362, causing the phenylalanine (F) at amino acid position 121 to be replaced by a cysteine (C). 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

Pathogenic

0.91

BayesDel_addAF

Pathogenic

0.43

BayesDel_noAF

Pathogenic

0.48

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.77

D;D;.;.;D;D

Eigen

Uncertain

0.49

Eigen_PC

Uncertain

0.43

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.88

.;D;D;D;T;D

M_CAP

Uncertain

0.17

MetaRNN

Pathogenic

0.99

D;D;D;D;D;D

MetaSVM

Uncertain

0.58

MutationAssessor

Pathogenic

4.0

H;H;.;H;.;.

PrimateAI

Uncertain

0.69

PROVEAN

Pathogenic

-7.2

D;D;.;D;D;D

REVEL

Pathogenic

0.93

Sift

Pathogenic

0.0

D;D;.;D;D;D

Sift4G

Pathogenic

0.0

D;D;.;D;D;D

Polyphen

1.0

D;D;.;.;.;.

Vest4

0.84

MutPred

0.90

Loss of catalytic residue at F121 (P = 0.0247);Loss of catalytic residue at F121 (P = 0.0247);Loss of catalytic residue at F121 (P = 0.0247);Loss of catalytic residue at F121 (P = 0.0247);Loss of catalytic residue at F121 (P = 0.0247);Loss of catalytic residue at F121 (P = 0.0247);

MVP

0.94

MPC

0.12

ClinPred

1.0

GERP RS

5.2

Varity_R

0.95

gMVP

0.91

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over