chr9-78248290-G-A

Variant names:

• chr9-78248290-G-A
• rs1057517694
• NM_001330691.3:c.893-1G>A

Variant summary

Our verdict is Pathogenic. The variant received 11 ACMG points: 11P and 0B. PVS1 PM2 PP5

The NM_001330691.3(CEP78):​c.893-1G>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: 32)
• Consequence: CEP78 NM_001330691.3 splice_acceptor, intron
• Scores: Splicing: ADA: 1.000
• Clinical Significance: Pathogenic no assertion criteria provided P:2
• Conservation: PhyloP100: 7.39
• Publications: 2 publications found

Genes affected

CEP78 (HGNC:25740): (centrosomal protein 78) This gene encodes a centrosomal protein that is both required for the regulation of centrosome-related events during the cell cycle, and required for ciliogenesis. The encoded protein has an N-terminal leucine-rich repeat (LRR) domain with six consecutive LRR repeats, and a C-terminal coiled-coil domain. It interacts with the N-terminal catalytic domain of polo-like kinase 4 (PLK4) and colocalizes with PLK4 to the distal end of the centriole. Naturally occurring mutations in this gene cause defects in primary cilia that result in retinal degeneration and sensorineural hearing loss which are associated with cone-rod degeneration disease as well as Usher syndrome. Low expression of this gene is associated with poor prognosis of colorectal cancer patients. [provided by RefSeq, Mar 2017]

CEP78 Gene-Disease associations (from GenCC):

• cone-rod dystrophy and hearing loss

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: ClinGen, G2P
• cone-rod dystrophy and hearing loss 1

  Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, PanelApp Australia
• Usher syndrome type 3

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Pathogenic. The variant received 11 ACMG points.

• PVS1: Splicing +-2 bp (donor or acceptor) variant, LoF is a know mechanism of disease, No cryptic splice site detected. Exon removal results in frameshift change.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 9-78248290-G-A is Pathogenic according to our data. Variant chr9-78248290-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 372269.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001330691.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CEP78	NM_001330691.3	MANE Select	c.893-1G>A		splice_acceptor intron	N/A	NP_001317620.1
	CEP78	NM_001098802.3		c.893-1G>A		splice_acceptor intron	N/A	NP_001092272.1
	CEP78	NM_001349838.2		c.893-1G>A		splice_acceptor intron	N/A	NP_001336767.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CEP78	ENST00000643273.2	MANE Select	c.893-1G>A		splice_acceptor intron	N/A	ENSP00000496423.2
	CEP78	ENST00000376597.9	TSL:1	c.893-1G>A		splice_acceptor intron	N/A	ENSP00000365782.4
	CEP78	ENST00000643499.1		c.893-1G>A		splice_acceptor intron	N/A	ENSP00000495962.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 22

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2

Revision: no assertion criteria provided

Submissions by phenotype

Cone-rod dystrophy and hearing loss 1 Pathogenic:1

Jun 14, 2021

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

Sensorineural hearing loss disorder;C4085590:Cone-rod dystrophy Pathogenic:1

Jun 23, 2019

Sharon lab, Hadassah-Hebrew University Medical Center

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: research

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.42
CADD	Pathogenic	32
DANN	Uncertain	1.0
Eigen	Pathogenic	1.2
Eigen_PC	Pathogenic	1.1
FATHMM_MKL	Pathogenic	0.99	D
PhyloP100		7.4
GERP RS		6.0
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)		0.99		Details are displayed if max score is > 0.2
DS_AL_spliceai		0.99		Position offset: 1

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

Other links and lift over

dbSNP: rs1057517694; hg19: chr9-80863206;