rs57666183

Variant names:

• chr9-78266603-T-C
• rs57666183
• NM_001330691.3:c.2007T>C

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_Strong BP6_Very_Strong BP7 BA1

The NM_001330691.3(CEP78):​c.2007T>C​(p.Cys669Cys) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00362 in 1,613,602 control chromosomes in the GnomAD database, including 169 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.019 (85 hom., cov: 32)
  • Exomes 𝑓: 0.0020 (84 hom.)
• Consequence: CEP78 NM_001330691.3 synonymous
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:4
• Conservation: PhyloP100: 1.18

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 Benign. Variant got -21 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.6).
• BP6: Variant 9-78266603-T-C is Benign according to our data. Variant chr9-78266603-T-C is described in ClinVar as [Benign]. Clinvar id is 517542.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=1.18 with no splicing effect.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.064 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CEP78	NM_001330691.3	c.2007T>C	p.Cys669Cys	synonymous_variant	Exon 16 of 17	ENST00000643273.2	NP_001317620.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CEP78	ENST00000643273.2	c.2007T>C	p.Cys669Cys	synonymous_variant	Exon 16 of 17		NM_001330691.3	ENSP00000496423.2

Frequencies

GnomAD3 genomes AF: 0.0192 AC: 2927 AN: 152128 Hom.: 84 Cov.: 32

Gnomad AFR AF: 0.0660

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0101

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00633

Gnomad NFE AF: 0.000132

Gnomad OTH AF: 0.0139

GnomAD3 exomes AF: 0.00517 AC: 1282 AN: 247978 Hom.: 37 AF XY: 0.00395 AC XY: 532 AN XY: 134576

Gnomad AFR exome AF: 0.0722

Gnomad AMR exome AF: 0.00352

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.000229

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000267

Gnomad OTH exome AF: 0.00233

GnomAD4 exome AF: 0.00199 AC: 2909 AN: 1461356 Hom.: 84 Cov.: 31 AF XY: 0.00176 AC XY: 1278 AN XY: 726948

Gnomad4 AFR exome AF: 0.0669

Gnomad4 AMR exome AF: 0.00472

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.000255

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000108

Gnomad4 OTH exome AF: 0.00479

GnomAD4 genome AF: 0.0193 AC: 2935 AN: 152246 Hom.: 85 Cov.: 32 AF XY: 0.0185 AC XY: 1380 AN XY: 74454

Gnomad4 AFR AF: 0.0660

Gnomad4 AMR AF: 0.0100

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000207

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000132

Gnomad4 OTH AF: 0.0137

Alfa AF: 0.00918 Hom.: 17

Bravo AF: 0.0224

Asia WGS AF: 0.00549 AC: 19 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:4

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:3

-

Breakthrough Genomics, Breakthrough Genomics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

May 05, 2021

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not specified Benign:1

Aug 23, 2017

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

p.Cys670Cys in exon 16 of CEP78: This variant is not expected to have clinical s ignificance because it does not alter an amino acid residue, is not located with in the splice consensus sequence, and has been identified in 7.49% (684/9138) of African chromosomes by the Exome Aggregation Consortium (ExAC, http://exac.broa dinstitute.org; dbSNP rs57666183). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.60
CADD	Benign	6.9
DANN	Benign	0.61

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: rs57666183; hg19: chr9-80881519;