NM_021147.5:c.957G>A

Variant names:

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_ModerateBP6_ModerateBP7BS1

The NM_021147.5(CCNO):c.957G>A(p.Lys319Lys) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00045 in 1,614,148 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

Frequency

Genomes: 𝑓 0.0025 ( 1 hom., cov: 33)

Exomes 𝑓: 0.00023 ( 1 hom. )

Consequence

CCNO
NM_021147.5 synonymous

Scores

Clinical Significance

Benign criteria provided, single submitter B:2

Conservation

PhyloP100: -0.104

Variant links:

Genes affected

CCNO (HGNC:18576): (cyclin O) This gene encodes a member of the cyclin protein family, and the encoded protein is involved in regulation of the cell cycle. Disruption of this gene is associated with primary ciliary dyskinesia-19. Alternative splicing results in multiple transcript variants. This gene, which has a previous symbol of UNG2, was erroneously identified as a uracil DNA glycosylase in PubMed ID: 2001396. A later publication, PubMed ID: 8419333, identified this gene's product as a cyclin protein family member. The UNG2 symbol is also used as a specific protein isoform name for the UNG gene (GeneID 7374), so confusion exists in the scientific literature and in some databases for these two genes. [provided by RefSeq, Jul 2014]

CCNO links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -9 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.38).

BP6

Variant 5-55231471-C-T is Benign according to our data. Variant chr5-55231471-C-T is described in ClinVar as [Benign]. Clinvar id is 416790.Status of the report is criteria_provided_single_submitter, 1 stars.

BP7

Synonymous conserved (PhyloP=-0.104 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00252 (384/152372) while in subpopulation AFR AF= 0.00899 (374/41590). AF 95% confidence interval is 0.00824. There are 1 homozygotes in gnomad4. There are 181 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CCNO	NM_021147.5 link	c.957G>A	p.Lys319Lys	synonymous_variant	Exon 3 of 3	ENST00000282572.5	NP_066970.3	P22674-1
CCNO	NR_125346.2 link	n.1418G>A		non_coding_transcript_exon_variant	Exon 3 of 3
CCNO	NR_125347.2 link	n.1047G>A		non_coding_transcript_exon_variant	Exon 3 of 3
CCNO	NR_125348.1 link	n.1021G>A		non_coding_transcript_exon_variant	Exon 2 of 2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
CCNO	ENST00000282572.5 link	c.957G>A	p.Lys319Lys	synonymous_variant	Exon 3 of 3	1	NM_021147.5	ENSP00000282572.4	P22674-1
CCNO	ENST00000501463.2 link	n.*937G>A		non_coding_transcript_exon_variant	Exon 3 of 3	1		ENSP00000422485.1	P22674-2
CCNO	ENST00000501463.2 link	n.*937G>A		3_prime_UTR_variant	Exon 3 of 3	1		ENSP00000422485.1	P22674-2

Frequencies

GnomAD3 genomes

AF:

0.00252

AC:

384

AN:

152254

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00902

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000458

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:

0.0000294

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000549

AC:

138

AN:

251292

Hom.:

AF XY:

0.000390

AC XY:

AN XY:

135904

show subpopulations

Gnomad AFR exome

AF:

0.00788

Gnomad AMR exome

AF:

0.000173

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000880

Gnomad OTH exome

AF:

0.000489

GnomAD4 exome

AF:

0.000234

AC:

342

AN:

1461776

Hom.:

Cov.:

AF XY:

0.000215

AC XY:

156

AN XY:

727198

show subpopulations

Gnomad4 AFR exome

AF:

0.00917

Gnomad4 AMR exome

AF:

0.000246

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000270

Gnomad4 OTH exome

AF:

0.000348

GnomAD4 genome

AF:

0.00252

AC:

384

AN:

152372

Hom.:

Cov.:

AF XY:

0.00243

AC XY:

181

AN XY:

74520

show subpopulations

Gnomad4 AFR

AF:

0.00899

Gnomad4 AMR

AF:

0.000457

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.00155

Hom.:

Bravo

AF:

0.00265

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Primary ciliary dyskinesia

Benign:1

Jan 13, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

CCNO-related disorder

Benign:1

Sep 08, 2024

PreventionGenetics, part of Exact Sciences

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.38

CADD

Benign

8.9

DANN

Benign

0.91

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

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over