15-43602295-C-T

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_153700.2(STRC):c.4546-744G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0436 in 151,828 control chromosomes in the GnomAD database, including 379 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.044 (379 hom., cov: 30)
• Consequence: STRC NM_153700.2 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.308

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]

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]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.9).
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.142 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
STRC	NM_153700.2	c.4546-744G>A		intron_variant		ENST00000450892.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
STRC	ENST00000450892.7	c.4546-744G>A		intron_variant		5	NM_153700.2	P2

Frequencies

GnomAD3 genomes AF: 0.0436 AC: 6608 AN: 151712 Hom.: 378 Cov.: 30

Gnomad AFR AF: 0.114

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0138

Gnomad ASJ AF: 0.00404

Gnomad EAS AF: 0.150

Gnomad SAS AF: 0.0198

Gnomad FIN AF: 0.0394

Gnomad MID AF: 0.0253

Gnomad NFE AF: 0.00472

Gnomad OTH AF: 0.0336

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.0436 AC: 6615 AN: 151828 Hom.: 379 Cov.: 30 AF XY: 0.0438 AC XY: 3252 AN XY: 74176

Gnomad4 AFR AF: 0.114

Gnomad4 AMR AF: 0.0138

Gnomad4 ASJ AF: 0.00404

Gnomad4 EAS AF: 0.150

Gnomad4 SAS AF: 0.0200

Gnomad4 FIN AF: 0.0394

Gnomad4 NFE AF: 0.00471

Gnomad4 OTH AF: 0.0337

Alfa AF: 0.00960 Hom.: 35

Bravo AF: 0.0467

Asia WGS AF: 0.0980 AC: 340 AN: 3476

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.90
Cadd	Benign	1.3
Dann	Benign	0.33

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: rs12050645; hg19: chr15-43894493;