NM_178335.3:c.626C>A

Variant names:

• chr3-191375239-C-A
• rs115771997
• NM_178335.3:c.626C>A

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 10P and 4B. PVS1 PM2 BS2

The NM_178335.3(CCDC50):​c.626C>A​(p.Ser209*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000329 in 152,052 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: 𝑓 0.000033 (0 hom., cov: 32)
• Consequence: CCDC50 NM_178335.3 stop_gained
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -2.21

Genes affected

CCDC50 (HGNC:18111): (coiled-coil domain containing 50) This gene encodes a soluble, cytoplasmic, tyrosine-phosphorylated protein with multiple ubiquitin-interacting domains. Mutations in this gene cause nonsyndromic, postlingual, progressive sensorineural DFNA44 hearing loss. In mouse, the protein is expressed in the inner ear during development and postnatal maturation and associates with microtubule-based structures. This protein may also function as a negative regulator of NF-kB signaling and as an effector of epidermal growth factor (EGF)-mediated cell signaling. Alternative splicing results in multiple transcript variants encoding distinct isoforms. [provided by RefSeq, Oct 2008]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• BS2: High AC in GnomAd4 at 5 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CCDC50	NM_178335.3	c.626C>A	p.Ser209*	stop_gained	Exon 6 of 12	ENST00000392455.9	NP_848018.1
CCDC50	XM_011512460.2	c.626C>A	p.Ser209*	stop_gained	Exon 6 of 8		XP_011510762.1
CCDC50	NM_174908.4	c.449-4920C>A		intron_variant	Intron 5 of 10		NP_777568.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CCDC50	ENST00000392455.9	c.626C>A	p.Ser209*	stop_gained	Exon 6 of 12	1	NM_178335.3	ENSP00000376249.4
CCDC50	ENST00000392456.4	c.449-4920C>A		intron_variant	Intron 5 of 10	1		ENSP00000376250.4

Frequencies

GnomAD3 genomes AF: 0.0000329 AC: 5 AN: 152052 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.000121

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: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome Cov.: 31

GnomAD4 genome AF: 0.0000329 AC: 5 AN: 152052 Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1 AN XY: 74264

Gnomad4 AFR AF: 0.000121

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: 0.00

Gnomad4 OTH AF: 0.00

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.28	D
BayesDel_noAF	Pathogenic	0.16
CADD	Uncertain	25
DANN	Benign	0.94
Eigen	Benign	-0.23
Eigen_PC	Benign	-0.60
FATHMM_MKL	Benign	0.020	N
GERP RS		-1.9

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: rs115771997; hg19: chr3-191093028;