Genetic Variant CEP104:p.Ser917Arg (chr1-3815429-G-T) – ACMG Classification: Likely_benign (-6 pts)

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 2P and 8B. PM2BP4_StrongBS1

The NM_014704.4(CEP104):c.2751C>A(p.Ser917Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000496 in 1,613,050 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S917G) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000026 ( 1 hom., cov: 34)

Exomes 𝑓: 0.000052 ( 0 hom. )

Consequence

CEP104
NM_014704.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 2.45

Variant links:

Genes affected

CEP104 (HGNC:24866): (centrosomal protein 104) This gene encodes a centrosomal protein required for ciliogenesis and for ciliary tip structural integrity. The mammalian protein contains three amino-terminal hydrophobic domains, two glycosylation sites, four cysteine-rich motifs, and two regions with homology to the glutamate receptor ionotropic, NMDA 1 protein. During ciliogenesis, the encoded protein translocates from the distal tips of the centrioles to the tip of the elongating cilium. Knockdown of the protein in human retinal pigment cells results in severe defects in ciliogenesis with structural deformities at the ciliary tips. Allelic variants of this gene are associated with the autosomal-recessive disorder Joubert syndrome, which is characterized by a distinctive mid-hindbrain and cerebellar malformation, oculomotor apraxia, irregular breathing, developmental delay, and ataxia. [provided by RefSeq, Feb 2016]

CEP104 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.024379462).

BS1

Variant frequency is greater than expected in population sas. gnomad4_exome allele frequency = 0.000052 (76/1460682) while in subpopulation SAS AF= 0.000836 (72/86076). AF 95% confidence interval is 0.000681. There are 0 homozygotes in gnomad4_exome. There are 57 alleles in male gnomad4_exome subpopulation. Median coverage is 31. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CEP104	NM_014704.4 link	c.2751C>A	p.Ser917Arg	missense_variant	Exon 22 of 22	ENST00000378230.8	NP_055519.1	O60308-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CEP104	ENST00000378230.8 link	c.2751C>A	p.Ser917Arg	missense_variant	Exon 22 of 22	5	NM_014704.4	ENSP00000367476.3		O60308-1

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152250

Hom.:

Cov.:

show subpopulations

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:

0.000828

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000108

AC:

AN:

249444

Hom.:

AF XY:

0.000156

AC XY:

AN XY:

135022

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000856

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.0000520

AC:

AN:

1460682

Hom.:

Cov.:

AF XY:

0.0000785

AC XY:

AN XY:

726570

show subpopulations

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:

0.000836

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000663

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152368

Hom.:

Cov.:

AF XY:

0.0000403

AC XY:

AN XY:

74518

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000829

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000378

ExAC

AF:

0.000115

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.32

BayesDel_addAF

Benign

-0.48

BayesDel_noAF

Benign

-0.53

CADD

Benign

DANN

Benign

0.94

DEOGEN2

Benign

0.0085

Eigen

Benign

-0.29

Eigen_PC

Benign

-0.29

FATHMM_MKL

Uncertain

0.83

LIST_S2

Benign

0.59

M_CAP

Benign

0.012

MetaRNN

Benign

0.024

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.8

PrimateAI

Benign

0.36

PROVEAN

Benign

-0.87

REVEL

Benign

0.027

Sift

Benign

0.12

Sift4G

Benign

0.37

Polyphen

0.57

Vest4

0.20

MutPred

0.20

Loss of phosphorylation at S917 (P = 0.0029);

MVP

0.38

MPC

0.20

ClinPred

0.066

GERP RS

3.3

Varity_R

0.048

gMVP

0.23

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

LitVar

Other links and lift over