6-2948314-C-T

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_004568.6(SERPINB6):c.1115G>A(p.Arg372His) variant causes a missense change. The variant allele was found at a frequency of 0.00000411 in 1,461,472 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: 32)
  • Exomes 𝑓: 0.0000041 (0 hom.)
• Consequence: SERPINB6 NM_004568.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.92

Genes affected

SERPINB6 (HGNC:8950): (serpin family B member 6) The protein encoded by this gene is a member of the serpin (serine proteinase inhibitor) superfamily, and ovalbumin(ov)-serpin subfamily. It was originally discovered as a placental thrombin inhibitor. The mouse homolog was found to be expressed in the hair cells of the inner ear. Mutations in this gene are associated with nonsyndromic progressive hearing loss, suggesting that this serpin plays an important role in the inner ear in the protection against leakage of lysosomal content during stress, and that loss of this protection results in cell death and sensorineural hearing loss. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Sep 2010]

ACMG classification

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, 0.982

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SERPINB6	NM_004568.6	c.1115G>A	p.Arg372His	missense_variant	7/7	ENST00000380539.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SERPINB6	ENST00000380539.7	c.1115G>A	p.Arg372His	missense_variant	7/7	3	NM_004568.6	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.0000119 AC: 3 AN: 251170 Hom.: 0 AF XY: 0.0000147 AC XY: 2 AN XY: 135766

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: 0.0000327

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000176

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000411 AC: 6 AN: 1461472 Hom.: 0 Cov.: 32 AF XY: 0.00000550 AC XY: 4 AN XY: 727026

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000252

Gnomad4 SAS exome AF: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000270

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.0000113

ExAC AF: 0.0000165 AC: 2

Asia WGS AF: 0.000289 AC: 1 AN: 3478

EpiCase AF: 0.00

EpiControl AF: 0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Jun 13, 2022

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. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive. This variant has not been reported in the literature in individuals affected with SERPINB6-related conditions. This variant is present in population databases (rs748043996, gnomAD 0.003%). This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 372 of the SERPINB6 protein (p.Arg372His). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.24
BayesDel_addAF	Pathogenic	0.22	D
BayesDel_noAF	Pathogenic	0.18
Cadd	Uncertain	25
Dann	Pathogenic	1.0
DEOGEN2	Uncertain	0.57	D;D;D;D;D;D;D;T;T;.;D;D;T
Eigen	Uncertain	0.54
Eigen_PC	Uncertain	0.48
FATHMM_MKL	Uncertain	0.92	D
M_CAP	Pathogenic	0.42	D
MetaRNN	Pathogenic	0.98	D;D;D;D;D;D;D;D;D;D;D;D;D
MetaSVM	Uncertain	0.45	D
MutationAssessor	Uncertain	2.5	M;M;M;M;M;M;M;.;.;.;M;M;.
MutationTaster	Benign	1.0	D;D;D;D;D;D
PrimateAI	Benign	0.43	T
PROVEAN	Uncertain	-4.2	D;D;D;D;.;D;.;.;.;.;.;D;.
REVEL	Pathogenic	0.73
Sift	Pathogenic	0.0	D;D;D;D;.;D;.;.;.;.;.;D;.
Sift4G	Pathogenic	0.0010	D;D;D;D;.;D;.;D;.;.;.;D;.
Polyphen		1.0	D;D;D;D;D;D;D;.;.;.;D;D;.
Vest4		0.61
MutPred		0.83		Loss of methylation at R372 (P = 0.0265);Loss of methylation at R372 (P = 0.0265);Loss of methylation at R372 (P = 0.0265);Loss of methylation at R372 (P = 0.0265);Loss of methylation at R372 (P = 0.0265);Loss of methylation at R372 (P = 0.0265);Loss of methylation at R372 (P = 0.0265);.;.;.;Loss of methylation at R372 (P = 0.0265);Loss of methylation at R372 (P = 0.0265);.;
MVP		0.97
MPC		0.56
ClinPred		0.99	D
GERP RS		5.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.82
gMVP		0.48

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

Other links and lift over

dbSNP: rs748043996; hg19: chr6-2948548;