Genetic Variant CCDC39:c.930+12C>A (chr3-180654750-G-T) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 2P and 6B. PM2BP4_StrongBP6_Moderate

The NM_181426.2(CCDC39):c.930+12C>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000702 in 1,425,432 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 7.0e-7 ( 0 hom. )

Consequence

CCDC39
NM_181426.2 intron

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 0.0890

Publications

0 publications found

Variant links:

Genes affected

CCDC39 (HGNC:25244): (coiled-coil domain 39 molecular ruler complex subunit) The protein encoded by this gene is involved in the motility of cilia and flagella. The encoded protein is essential for the assembly of dynein regulatory and inner dynein arm complexes, which regulate ciliary beat. Defects in this gene are a cause of primary ciliary dyskinesia type 14 (CILD14). [provided by RefSeq, Jul 2011]

CCDC39 Gene-Disease associations (from GenCC):

primary ciliary dyskinesia 14
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: ClinGen, G2P, PanelApp Australia, Labcorp Genetics (formerly Invitae)
primary ciliary dyskinesia
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

CCDC39 links:

ENSG00000145075 (HGNC:):

ENSG00000145075 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.76).

BP6

Variant 3-180654750-G-T is Benign according to our data. Variant chr3-180654750-G-T is described in ClinVar as Likely_benign. ClinVar VariationId is 3014583.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CCDC39	NM_181426.2 link	c.930+12C>A		intron_variant	Intron 7 of 19	ENST00000476379.6	NP_852091.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CCDC39	ENST00000476379.6 link	c.930+12C>A		intron_variant	Intron 7 of 19	2	NM_181426.2	ENSP00000417960.2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

7.02e-7

AC:

AN:

1425432

Hom.:

Cov.:

AF XY:

0.00000141

AC XY:

AN XY:

709402

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

31880

American (AMR)

AF:

0.00

AC:

AN:

41718

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25516

East Asian (EAS)

AF:

0.00

AC:

AN:

38394

South Asian (SAS)

AF:

0.0000124

AC:

AN:

80818

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52520

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5676

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1090042

Other (OTH)

AF:

0.00

AC:

AN:

58868

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.275

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Primary ciliary dyskinesia

Benign:1

Aug 19, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.76

CADD

Benign

1.0

(source)

DANN

Benign

0.83

PhyloP100

0.089

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.070

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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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over