9-78236372-C-T

Position:

• chr9-78236372-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_001330691.3(CEP78):​c.22C>T​(p.Arg8Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000183 in 1,584,714 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000020 (0 hom.)
• Consequence: CEP78 NM_001330691.3 missense
• Clinical Significance: Conflicting classifications of pathogenicity no assertion criteria provided P:1 U:1
• Conservation: PhyloP100: 2.57

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.32646966).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CEP78	NM_001330691.3	c.22C>T	p.Arg8Cys	missense_variant	1/17	ENST00000643273.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CEP78	ENST00000643273.2	c.22C>T	p.Arg8Cys	missense_variant	1/17		NM_001330691.3	P4

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152166 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

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: 0.0000147

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.0000195 AC: 28 AN: 1432548 Hom.: 0 Cov.: 30 AF XY: 0.0000141 AC XY: 10 AN XY: 710770

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.0000220

Gnomad4 NFE exome AF: 0.0000245

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152166 Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1 AN XY: 74322

Gnomad4 AFR AF: 0.00

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: 0.0000147

Gnomad4 OTH AF: 0.00

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1 Uncertain:1

Revision: no assertion criteria provided

Submissions by phenotype

Moyamoya angiopathy Pathogenic:1

Likely pathogenic, no assertion criteria provided

research

University of Washington Center for Mendelian Genomics, University of Washington

-

- -

CEP78-related disorder Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Jul 20, 2024

The CEP78 c.22C>T variant is predicted to result in the amino acid substitution p.Arg8Cys. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.0012% of alleles in individuals of European (Non-Finnish) descent in gnomAD. At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.55
BayesDel_addAF	Benign	-0.078	T
BayesDel_noAF	Benign	-0.35
CADD	Pathogenic	30
DANN	Uncertain	1.0
DEOGEN2	Benign	0.32	T;.;.;.;.;.;.;.;.;T;.;.;.;.
Eigen	Uncertain	0.45
Eigen_PC	Uncertain	0.35
FATHMM_MKL	Uncertain	0.83	D
LIST_S2	Uncertain	0.96	D;D;D;D;D;D;D;.;D;D;D;D;D;D
M_CAP	Benign	0.043	D
MetaRNN	Benign	0.33	T;T;T;T;T;T;T;T;T;T;T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.5	M;.;.;.;.;.;M;M;M;.;M;.;.;.
MutationTaster	Benign	1.0	D;D;D;D;D
PrimateAI	Pathogenic	0.85	D
PROVEAN	Uncertain	-3.8	D;.;.;.;.;.;.;D;D;D;.;.;.;D
REVEL	Benign	0.16
Sift	Pathogenic	0.0	D;.;.;.;.;.;.;D;D;D;.;.;.;D
Sift4G	Pathogenic	0.0	D;.;.;.;.;.;.;D;D;D;.;.;.;D
Polyphen		1.0	D;.;.;.;.;.;.;.;D;.;.;.;.;.
Vest4		0.44
MutPred		0.49		Loss of disorder (P = 0.0104);Loss of disorder (P = 0.0104);Loss of disorder (P = 0.0104);Loss of disorder (P = 0.0104);Loss of disorder (P = 0.0104);Loss of disorder (P = 0.0104);Loss of disorder (P = 0.0104);Loss of disorder (P = 0.0104);Loss of disorder (P = 0.0104);Loss of disorder (P = 0.0104);Loss of disorder (P = 0.0104);Loss of disorder (P = 0.0104);Loss of disorder (P = 0.0104);Loss of disorder (P = 0.0104);
MVP		0.58
MPC		0.086
ClinPred		0.99	D
GERP RS		4.0
Varity_R		0.56
gMVP		0.79

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: rs1314816485; hg19: chr9-80851288;