15-82851186-T-TG

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PVS1_Strong PM2 PP5

The NM_004839.4(HOMER2):c.807_808insC(p.Met270HisfsTer9) variant causes a frameshift 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 Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 33)
• Consequence: HOMER2 NM_004839.4 frameshift
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 0.749

Genes affected

HOMER2 (HGNC:17513): (homer scaffold protein 2) This gene encodes a member of the homer family of dendritic proteins. Members of this family regulate group 1 metabotrophic glutamate receptor function. The encoded protein is a postsynaptic density scaffolding protein. Alternative splicing results in multiple transcript variants. Two related pseudogenes have been identified on chromosome 14. [provided by RefSeq, Jun 2011]

ACMG classification

Verdict is Likely_pathogenic. Variant got 7 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most 50 bp of the penultimate exon, not predicted to undergo nonsense mediated mRNA decay. Fraction of 0.218 CDS is truncated, and there are 2 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 15-82851186-T-TG is Pathogenic according to our data. Variant chr15-82851186-T-TG is described in ClinVar as [Pathogenic]. Clinvar id is 922123.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
HOMER2	NM_004839.4	c.807_808insC	p.Met270HisfsTer9	frameshift_variant	8/9	ENST00000450735.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
HOMER2	ENST00000450735.7	c.807_808insC	p.Met270HisfsTer9	frameshift_variant	8/9	1	NM_004839.4
HOMER2	ENST00000304231.12	c.840_841insC	p.Met281HisfsTer9	frameshift_variant	8/9	5		P1
HOMER2	ENST00000558552.1	n.687_688insC		non_coding_transcript_exon_variant	2/3	2
HOMER2	ENST00000558817.1			downstream_gene_variant		3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 33

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Autosomal dominant nonsyndromic hearing loss 68 Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Jun 18, 2020

- -

Computational scores

Source: dbNSFP v4.3

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: rs2051382723; hg19: chr15-83519938;