1-3839074-C-G

Variant names:

• chr1-3839074-C-G
• rs768279838
• NM_014704.4:c.781G>C

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_014704.4(CEP104):​c.781G>C​(p.Val261Leu) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,822 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. V261M) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: CEP104 NM_014704.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.05
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• Joubert syndrome 25

  Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics
• Joubert syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_014704.4. 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
	CEP104	NM_014704.4	MANE Select	c.781G>C	p.Val261Leu	missense	Exon 8 of 22	NP_055519.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CEP104	ENST00000378230.8	TSL:5 MANE Select	c.781G>C	p.Val261Leu	missense	Exon 8 of 22	ENSP00000367476.3
	CEP104	ENST00000494653.5	TSL:1	c.781G>C	p.Val261Leu	missense	Exon 8 of 12	ENSP00000501736.1
	CEP104	ENST00000675666.1		c.781G>C	p.Val261Leu	missense	Exon 8 of 21	ENSP00000502548.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461822 Hom.: 0 Cov.: 30 AF XY: 0.00000138 AC XY: 1 AN XY: 727218

African (AFR) AF: 0.00 AC: 0 AN: 33478

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86254

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53414

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111954

Other (OTH) AF: 0.0000166 AC: 1 AN: 60394

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.68
BayesDel_addAF	Benign	-0.0011	T
BayesDel_noAF	Benign	-0.24
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Benign	0.065	T
Eigen	Uncertain	0.65
Eigen_PC	Uncertain	0.58
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.91	D
M_CAP	Benign	0.052	D
MetaRNN	Uncertain	0.50	T
MetaSVM	Uncertain	-0.27	T
MutationAssessor	Uncertain	2.8	M
PhyloP100		4.0
PrimateAI	Benign	0.47	T
PROVEAN	Benign	-1.9	N
REVEL	Benign	0.21
Sift	Uncertain	0.019	D
Sift4G	Uncertain	0.017	D
Polyphen		1.0	D
Vest4		0.36
MutPred		0.54		Gain of helix (P = 0.062)
MVP		0.75
MPC		0.53
ClinPred		0.96	D
GERP RS		5.3
Varity_R		0.23
gMVP		0.41
Mutation Taster		=77/23	polymorphism

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

Other links and lift over

dbSNP: rs768279838; hg19: chr1-3755638;