15-43600596-C-T

Variant names:

• chr15-43600596-C-T
• rs2085657484
• NM_153700.2:c.4931G>A

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_153700.2(STRC):​c.4931G>A​(p.Gly1644Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 26)
• Consequence: STRC NM_153700.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.24

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 Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
STRC	NM_153700.2	c.4931G>A	p.Gly1644Asp	missense_variant	Exon 26 of 29	ENST00000450892.7	NP_714544.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
STRC	ENST00000450892.7	c.4931G>A	p.Gly1644Asp	missense_variant	Exon 26 of 29	5	NM_153700.2	ENSP00000401513.2

Frequencies

GnomAD3 genomes Cov.: 26

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 26

Alfa AF: 0.0000468 Hom.: 0

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Dec 12, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.4931G>A (p.G1644D) alteration is located in exon 26 (coding exon 26) of the STRC gene. This alteration results from a G to A substitution at nucleotide position 4931, causing the glycine (G) at amino acid position 1644 to be replaced by an aspartic acid (D). 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	Benign	0.28
BayesDel_addAF	Uncertain	0.019	T
BayesDel_noAF	Benign	-0.21
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Benign	0.053	T;.
Eigen	Benign	-0.24
Eigen_PC	Benign	-0.17
FATHMM_MKL	Benign	0.31	N
LIST_S2	Benign	0.81	T;T
M_CAP	Uncertain	0.16	D
MetaRNN	Uncertain	0.49	T;T
MetaSVM	Benign	-0.38	T
PrimateAI	Uncertain	0.60	T
PROVEAN	Benign	-0.93	N;N
REVEL	Uncertain	0.33
Sift	Benign	0.21	T;T
Sift4G	Pathogenic	0.0	D;D
Polyphen		0.90	P;B
Vest4		0.63
MutPred		0.41		Gain of solvent accessibility (P = 0.0638);.;
MVP		0.77
ClinPred		0.57	D
GERP RS		3.8
Varity_R		0.13
gMVP		0.49

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: rs2085657484; hg19: chr15-43892794;