chr15-43600227-G-T

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PP3_Moderate

The NM_153700.2(STRC):c.5060C>A(p.Ala1687Asp) variant causes a missense change. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000028 ( 0 hom., cov: 23)

Exomes 𝑓: 0.000018 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

STRC
NM_153700.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.09

Variant links:

Genes affected

STRC (HGNC:16035): (stereocilin) This gene encodes a protein that is associated with the hair bundle of the sensory hair cells in the inner ear. The hair bundle is composed of stiff microvilli called stereocilia and is involved with mechanoreception of sound waves. This gene is part of a tandem duplication on chromosome 15; the second copy is a pseudogene. Mutations in this gene cause autosomal recessive non-syndromic deafness. [provided by RefSeq, Jul 2008]

STRC links:

CKMT1B (HGNC:1995): (creatine kinase, mitochondrial 1B) Mitochondrial creatine (MtCK) kinase is responsible for the transfer of high energy phosphate from mitochondria to the cytosolic carrier, creatine. It belongs to the creatine kinase isoenzyme family. It exists as two isoenzymes, sarcomeric MtCK and ubiquitous MtCK, encoded by separate genes. Mitochondrial creatine kinase occurs in two different oligomeric forms: dimers and octamers, in contrast to the exclusively dimeric cytosolic creatine kinase isoenzymes. Many malignant cancers with poor prognosis have shown overexpression of ubiquitous mitochondrial creatine kinase; this may be related to high energy turnover and failure to eliminate cancer cells via apoptosis. Ubiquitous mitochondrial creatine kinase has 80% homology with the coding exons of sarcomeric mitochondrial creatine kinase. Two genes located near each other on chromosome 15 have been identified which encode identical mitochondrial creatine kinase proteins. [provided by RefSeq, Jul 2008]

CKMT1B links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.856

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
STRC	NM_153700.2 link	c.5060C>A	p.Ala1687Asp	missense_variant	Exon 27 of 29	ENST00000450892.7	NP_714544.1	Q7RTU9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
STRC	ENST00000450892.7 link	c.5060C>A	p.Ala1687Asp	missense_variant	Exon 27 of 29	5	NM_153700.2	ENSP00000401513.2		Q7RTU9

Frequencies

GnomAD3 genomes

AF:

0.00

AC:

AN:

144660

Hom.:

Cov.:

FAILED QC

Gnomad AFR

AF:

0.0000515

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000303

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.0000177

AC:

AN:

1187704

Hom.:

Cov.:

AF XY:

0.0000168

AC XY:

AN XY:

595412

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:

0.0000238

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Data not reliable, filtered out with message: AS_VQSR

AF:

0.0000277

AC:

AN:

144660

Hom.:

Cov.:

AF XY:

0.0000143

AC XY:

AN XY:

70046

show subpopulations

Gnomad4 AFR

AF:

0.0000515

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000303

Gnomad4 OTH

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Autosomal recessive nonsyndromic hearing loss 16

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Victorian Clinical Genetics Services, Murdoch Childrens Research Institute

Jul 17, 2023

Based on the classification scheme VCGS_Germline_v1.3.4, this variant is classified as VUS-3A. Following criteria are met: 0102 - Loss of function is a known mechanism of disease in this gene and is associated with Deafness, autosomal recessive 16 (MIM#603720). (I) 0106 - This gene is associated with autosomal recessive disease. (I) 0200 - Variant is predicted to result in a missense amino acid change from alanine to aspartic acid. (I) 0253 - This variant is hemizygous. (I) 0301 - Variant is absent from gnomAD (v3 filtered out: 4 heterozygotes, 0 homozygotes). (SP) 0309 - Alternative amino acid changes at the same position have been observed in gnomAD (v2 highest count: 1 heterozygote, 0 homozygote). (I) 0501 - Missense variant consistently predicted to be damaging by multiple in silico tools or highly conserved with a major amino acid change. (SP) 0604 - Variant is not located in an established domain, motif, hotspot or informative constraint region. (I) 0705 - No comparable missense variants have previous evidence for pathogenicity. The p.(Ala1687Gly) and p.(Ala1687Thr) variants are both listed in the Deafness Variation Database as VUSs based on in silico predictions, however no clinical information was provided. (I) 0803 - This variant has limited previous evidence of pathogenicity in an unrelated individual. This variant was listed in the Deafness Variation Database as pathogenic. (SP) 0905 - No published segregation evidence has been identified for this variant. (I) 1007 - No published functional evidence has been identified for this variant. (I) 1201 - Heterozygous variant inferred to be in trans with a pathogenic heterozygous deletion in a recessive disease. (I) 1208 - Inheritance information for this variant is not currently available in this individual. (I) Legend: (SP) - Supporting pathogenic, (I) - Information, (SB) - Supporting benign -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.93

BayesDel_addAF

Pathogenic

0.41

BayesDel_noAF

Pathogenic

0.36

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.64

D;.

Eigen

Uncertain

0.60

Eigen_PC

Uncertain

0.61

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Benign

0.81

T;T

M_CAP

Uncertain

0.12

MetaRNN

Pathogenic

0.86

D;D

MetaSVM

Uncertain

0.078

PrimateAI

Uncertain

0.62

PROVEAN

Pathogenic

-4.5

D;D

REVEL

Pathogenic

0.72

Sift

Uncertain

0.0040

D;D

Sift4G

Pathogenic

0.0

D;D

Polyphen

0.99

D;D

Vest4

0.75

MutPred

0.52

Gain of relative solvent accessibility (P = 0.0479);.;

MVP

0.89

ClinPred

1.0

GERP RS

4.8

Varity_R

0.61

gMVP

0.89

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