NM_001286445.3:c.189-1G>A

Variant names:

• chr6-24873800-C-T
• rs875989828
• NM_001286445.3:c.189-1G>A

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 5P and 0B. PVS1_Moderate PM2 PP5

The NM_001286445.3(RIPOR2):​c.189-1G>A variant causes a splice acceptor, intron change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 33)
• Consequence: RIPOR2 NM_001286445.3 splice_acceptor, intron
• Scores: Splicing: ADA: 1.000
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 7.57
• Publications: 2 publications found

Genes affected

RIPOR2 (HGNC:13872): (RHO family interacting cell polarization regulator 2) This gene encodes an atypical inhibitor of the small G protein RhoA. Inhibition of RhoA activity by the encoded protein mediates myoblast fusion and polarization of T cells and neutrophils. The encoded protein is a component of hair cell stereocilia that is essential for hearing. A splice site mutation in this gene results in hearing loss in human patients. [provided by RefSeq, Sep 2016]

RIPOR2 Gene-Disease associations (from GenCC):

• nonsyndromic genetic hearing loss

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

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• autosomal dominant nonsyndromic hearing loss

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen
• autosomal dominant nonsyndromic hearing loss 21

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
• autosomal recessive nonsyndromic hearing loss 104

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

ACMG classification

Our verdict: Uncertain_significance. The variant received 5 ACMG points.

• PVS1: Splicing +-2 bp (donor or acceptor) variant, product NOT destroyed by NMD, known LOF gene, truncates exone, which is 0.049618322 fraction of the gene. Cryptic splice site detected, with MaxEntScore 6.1, offset of 1, new splice context is: tcttctgttctttccataAGtgt. Cryptic site results in frameshift change. If cryptic site found is not functional and variant results in exon loss, it results in inframe change.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 6-24873800-C-T is Pathogenic according to our data. Variant chr6-24873800-C-T is described in ClinVar as Pathogenic. ClinVar VariationId is 208145.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001286445.3. 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
	RIPOR2	NM_001286445.3	MANE Select	c.189-1G>A		splice_acceptor intron	N/A	NP_001273374.1	A0A2R8YEE0
	RIPOR2	NM_014722.5		c.102-1G>A		splice_acceptor intron	N/A	NP_055537.2
	RIPOR2	NM_001346031.2		c.102-1G>A		splice_acceptor intron	N/A	NP_001332960.1	F5GX51

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RIPOR2	ENST00000643898.2	MANE Select	c.189-1G>A		splice_acceptor intron	N/A	ENSP00000494268.2	A0A2R8YEE0
	RIPOR2	ENST00000259698.9	TSL:1	c.102-1G>A		splice_acceptor intron	N/A	ENSP00000259698.4	Q9Y4F9-1
	RIPOR2	ENST00000378023.8	TSL:1	c.102-1G>A		splice_acceptor intron	N/A	ENSP00000367262.4	Q9Y4F9-2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	Autosomal recessive nonsyndromic hearing loss 104 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.45	D
BayesDel_noAF	Pathogenic	0.40
CADD	Pathogenic	33
DANN	Uncertain	1.0
Eigen	Pathogenic	1.2
Eigen_PC	Pathogenic	1.0
FATHMM_MKL	Pathogenic	1.0	D
PhyloP100		7.6
GERP RS		5.5
Mutation Taster		=0/100	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.94
SpliceAI score (max)		1.0		Details are displayed if max score is > 0.2
DS_AG_spliceai		0.81		Position offset: -2
DS_AL_spliceai		1.0		Position offset: -1

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

Other links and lift over

dbSNP: rs875989828; hg19: chr6-24874028;