4-17526856-C-G

Variant names:

• chr4-17526856-C-G
• rs200173085
• NM_001079827.2:c.473C>G

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_001079827.2(CLRN2):​c.473C>G​(p.Ala158Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A158V) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CLRN2 NM_001079827.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.33
• Publications: 4 publications found

Genes affected

CLRN2 (HGNC:33939): (clarin 2) This gene belongs to the clarin family of genes. The clarins appear to belong to a large superfamily of small integral membrane glycoproteins with four transmembrane domains. The exact function of this gene is unknown. [provided by RefSeq, Oct 2008]

CLRN2 Gene-Disease associations (from GenCC):

• nonsyndromic genetic hearing loss

  Inheritance: AR Classification: MODERATE Submitted by: ClinGen
• hearing loss, autosomal recessive 117

  Inheritance: AR Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.4206075).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001079827.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CLRN2	NM_001079827.2	MANE Select	c.473C>G	p.Ala158Gly	missense	Exon 3 of 3	NP_001073296.1	A0PK11

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CLRN2	ENST00000511148.2	TSL:1 MANE Select	c.473C>G	p.Ala158Gly	missense	Exon 3 of 3	ENSP00000424711.2	A0PK11

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.21
BayesDel_addAF	Uncertain	0.046	T
BayesDel_noAF	Benign	-0.17
CADD	Benign	16
DANN	Uncertain	0.99
DEOGEN2	Benign	0.052	T
Eigen	Benign	-0.085
Eigen_PC	Benign	-0.090
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Benign	0.76	T
M_CAP	Benign	0.057	D
MetaRNN	Benign	0.42	T
MetaSVM	Uncertain	0.25	D
MutationAssessor	Benign	1.6	L
PhyloP100		3.3
PrimateAI	Benign	0.40	T
PROVEAN	Benign	-0.15	N
REVEL	Benign	0.26
Sift	Benign	0.27	T
Sift4G	Benign	0.27	T
Polyphen		0.41	B
Vest4		0.52
MutPred		0.42		Loss of helix (P = 0.0104)
MVP		0.74
MPC		0.24
ClinPred		0.63	D
GERP RS		4.9
Varity_R		0.097
gMVP		0.52
Mutation Taster		=60/40	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs200173085; hg19: chr4-17528479;