rs755937476

Variant names:

• chr5-55232437-A-C
• rs755937476
• NM_021147.5:c.491T>G

Your query was ambiguous. Multiple possible variants found:

• chr5-55232437-A-C
• chr5-55232437-A-G

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_021147.5(CCNO):​c.491T>G​(p.Phe164Cys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic 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. F164S) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: CCNO NM_021147.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 9.06
• Publications: 1 publications found

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

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.936

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CCNO	NM_021147.5	c.491T>G	p.Phe164Cys	missense_variant	Exon 2 of 3	ENST00000282572.5	NP_066970.3
CCNO	NR_125346.2	n.952T>G		non_coding_transcript_exon_variant	Exon 2 of 3
CCNO	NR_125347.2	n.581T>G		non_coding_transcript_exon_variant	Exon 2 of 3
CCNO	NR_125348.1	n.555T>G		non_coding_transcript_exon_variant	Exon 1 of 2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CCNO	ENST00000282572.5	c.491T>G	p.Phe164Cys	missense_variant	Exon 2 of 3	1	NM_021147.5	ENSP00000282572.4
CCNO	ENST00000501463.2	n.*471T>G		non_coding_transcript_exon_variant	Exon 2 of 3	1		ENSP00000422485.1
CCNO	ENST00000501463.2	n.*471T>G		3_prime_UTR_variant	Exon 2 of 3	1		ENSP00000422485.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD2 exomes AF: 0.00000398 AC: 1 AN: 251222 AF XY: 0.00000736

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 FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000881

Gnomad OTH exome AF: 0.00

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

ExAC AF: 0.00000824 AC: 1

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.97
BayesDel_addAF	Pathogenic	0.28	D
BayesDel_noAF	Pathogenic	0.16
CADD	Pathogenic	30
DANN	Uncertain	0.99
DEOGEN2	Benign	0.26	T
Eigen	Pathogenic	0.86
Eigen_PC	Pathogenic	0.81
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Benign	0.84	T
M_CAP	Benign	0.083	D
MetaRNN	Pathogenic	0.94	D
MetaSVM	Benign	-0.76	T
MutationAssessor	Pathogenic	3.2	M
PhyloP100		9.1
PrimateAI	Uncertain	0.75	T
PROVEAN	Pathogenic	-6.5	D
REVEL	Pathogenic	0.76
Sift	Uncertain	0.0010	D
Sift4G	Pathogenic	0.0010	D
Polyphen		1.0	D
Vest4		0.96
MutPred		0.80		Gain of catalytic residue at L165 (P = 0.0098);
MVP		0.65
MPC		1.5
ClinPred		1.0	D
GERP RS		5.3
Varity_R		0.83
gMVP		0.72
Mutation Taster		=15/85	disease causing

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: rs755937476; hg19: chr5-54528265;