Genetic Variant CCNO:p.Glu314Gln (chr5-55231488-C-G) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_021147.5(CCNO):c.940G>C(p.Glu314Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,670 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 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. E314K) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

CCNO
NM_021147.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.561

Publications

0 publications found

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 Gene-Disease associations (from GenCC):

primary ciliary dyskinesia 29
Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: G2P, Labcorp Genetics (formerly Invitae), PanelApp Australia, ClinGen, Ambry Genetics
primary ciliary dyskinesia
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

CCNO links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

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 (MetaRNN=0.030564755).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CCNO	NM_021147.5 link	c.940G>C	p.Glu314Gln	missense_variant	Exon 3 of 3	ENST00000282572.5	NP_066970.3	P22674-1
CCNO	NR_125346.2 link	n.1401G>C		non_coding_transcript_exon_variant	Exon 3 of 3
CCNO	NR_125347.2 link	n.1030G>C		non_coding_transcript_exon_variant	Exon 3 of 3
CCNO	NR_125348.1 link	n.1004G>C		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.940G>C	p.Glu314Gln	missense_variant	Exon 3 of 3	1	NM_021147.5	ENSP00000282572.4	P22674-1
CCNO	ENST00000501463.2 link	n.*920G>C		non_coding_transcript_exon_variant	Exon 3 of 3	1		ENSP00000422485.1	P22674-2
CCNO	ENST00000501463.2 link	n.*920G>C		3_prime_UTR_variant	Exon 3 of 3	1		ENSP00000422485.1	P22674-2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461670

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727164

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53212

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1112002

Other (OTH)

AF:

0.0000166

AC:

AN:

60392

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.060

BayesDel_addAF

Benign

-0.34

BayesDel_noAF

Benign

-0.72

CADD

Benign

6.6

(source)

DANN

Benign

0.70

DEOGEN2

Benign

0.059

Eigen

Benign

-1.3

Eigen_PC

Benign

-1.2

FATHMM_MKL

Benign

0.029

LIST_S2

Benign

0.56

M_CAP

Benign

0.0059

MetaRNN

Benign

0.031

MetaSVM

Benign

-1.0

MutationAssessor

Benign

-2.0

PhyloP100

0.56

PrimateAI

Benign

0.35

PROVEAN

Benign

0.79

REVEL

Benign

0.079

Sift

Benign

1.0

Sift4G

Benign

1.0

Polyphen

0.0

Vest4

0.061

MutPred

0.27

Loss of ubiquitination at K319 (P = 0.1191);

MVP

0.20

MPC

0.40

ClinPred

0.050

GERP RS

1.6

Varity_R

0.12

gMVP

0.17

Mutation Taster

=97/3

polymorphism

(source)

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

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5-55231488-C-G

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over