20-35491374-G-T

Variant names:

• chr20-35491374-G-T
• rs224373
• NM_007186.6:c.2889+28G>T

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_007186.6(CEP250):​c.2889+28G>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: CEP250 NM_007186.6 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.167
• Publications: 10 publications found

Genes affected

CEP250 (HGNC:1859): (centrosomal protein 250) This gene encodes a core centrosomal protein required for centriole-centriole cohesion during interphase of the cell cycle. The encoded protein dissociates from the centrosomes when parental centrioles separate at the beginning of mitosis. The protein associates with and is phosphorylated by NIMA-related kinase 2, which is also associated with the centrosome. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Dec 2015]

CEP250 Gene-Disease associations (from GenCC):

• cone-rod dystrophy and hearing loss 2

  Inheritance: AR Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics, PanelApp Australia
• retinitis pigmentosa

  Inheritance: AR Classification: LIMITED Submitted by: Franklin by Genoox
• male infertility with azoospermia or oligozoospermia due to single gene mutation

  Inheritance: AR Classification: NO_KNOWN Submitted by: King Faisal Specialist Hospital and Research Center

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.8).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_007186.6. 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
	CEP250	NM_007186.6	MANE Select	c.2889+28G>T		intron	N/A	NP_009117.2
	CEP250	NM_001318219.1		c.993+28G>T		intron	N/A	NP_001305148.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CEP250	ENST00000397527.6	TSL:5 MANE Select	c.2889+28G>T		intron	N/A	ENSP00000380661.1
	CEP250	ENST00000706828.1		c.3060+28G>T		intron	N/A	ENSP00000516576.1
	CEP250	ENST00000706829.1		c.2889+28G>T		intron	N/A	ENSP00000516577.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1415368 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 699694

African (AFR) AF: 0.00 AC: 0 AN: 32102

American (AMR) AF: 0.00 AC: 0 AN: 37758

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25330

East Asian (EAS) AF: 0.00 AC: 0 AN: 36694

South Asian (SAS) AF: 0.00 AC: 0 AN: 80534

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 50502

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5708

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1088036

Other (OTH) AF: 0.00 AC: 0 AN: 58704

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.80
CADD	Benign	3.3
PhyloP100		-0.17

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: rs224373; hg19: chr20-34079200;