rs57859179

Positions:

• chr3-180616275-G-A

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BS1 BS2

The NM_181426.2(CCDC39):​c.2669+6C>T variant causes a splice donor region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00122 in 1,612,398 control chromosomes in the GnomAD database, including 18 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0057 (7 hom., cov: 32)
  • Exomes 𝑓: 0.00075 (11 hom.)
• Consequence: CCDC39 NM_181426.2 splice_donor_region, intron
• Scores: Splicing: ADA: 0.00001458
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:4
• Conservation: PhyloP100: 0.616

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]

TTC14 (HGNC:24697): (tetratricopeptide repeat domain 14) Predicted to enable nucleic acid binding activity. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.69).
• BP6: Variant 3-180616275-G-A is Benign according to our data. Variant chr3-180616275-G-A is described in ClinVar as [Benign]. Clinvar id is 242174.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr3-180616275-G-A is described in Lovd as [Benign].
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00572 (870/152144) while in subpopulation AFR AF= 0.0195 (808/41502). AF 95% confidence interval is 0.0184. There are 7 homozygotes in gnomad4. There are 383 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 7 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CCDC39	NM_181426.2	c.2669+6C>T		splice_donor_region_variant, intron_variant		ENST00000476379.6	NP_852091.1
TTC14	NM_001288582.2	c.1775-1105G>A		intron_variant			NP_001275511.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CCDC39	ENST00000476379.6	c.2669+6C>T		splice_donor_region_variant, intron_variant		2	NM_181426.2	ENSP00000417960	P2

Frequencies

GnomAD3 genomes AF: 0.00571 AC: 868 AN: 152026 Hom.: 7 Cov.: 32

Gnomad AFR AF: 0.0195

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00197

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.0158

Gnomad NFE AF: 0.000235

Gnomad OTH AF: 0.00431

GnomAD3 exomes AF: 0.00145 AC: 360 AN: 248574 Hom.: 2 AF XY: 0.00105 AC XY: 141 AN XY: 134842

Gnomad AFR exome AF: 0.0192

Gnomad AMR exome AF: 0.000932

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000557

Gnomad SAS exome AF: 0.000262

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000178

Gnomad OTH exome AF: 0.000332

GnomAD4 exome AF: 0.000749 AC: 1093 AN: 1460254 Hom.: 11 Cov.: 30 AF XY: 0.000648 AC XY: 471 AN XY: 726400

Gnomad4 AFR exome AF: 0.0211

Gnomad4 AMR exome AF: 0.00101

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000252

Gnomad4 SAS exome AF: 0.000220

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000160

Gnomad4 OTH exome AF: 0.00209

GnomAD4 genome AF: 0.00572 AC: 870 AN: 152144 Hom.: 7 Cov.: 32 AF XY: 0.00515 AC XY: 383 AN XY: 74396

Gnomad4 AFR AF: 0.0195

Gnomad4 AMR AF: 0.00210

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000207

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000235

Gnomad4 OTH AF: 0.00427

Alfa AF: 0.00290 Hom.: 4

Bravo AF: 0.00600

Asia WGS AF: 0.000866 AC: 3 AN: 3478

EpiCase AF: 0.000546

EpiControl AF: 0.000119

ClinVar

Significance: Benign

Submissions summary: Benign:4

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:1

Benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

-

- -

Primary ciliary dyskinesia Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 31, 2024

- -

not provided Benign:1

Benign, criteria provided, single submitter

not provided

Breakthrough Genomics, Breakthrough Genomics

-

- -

Primary ciliary dyskinesia 14 Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Mar 26, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.69
CADD	Benign	3.3
DANN	Benign	0.71

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.000015
dbscSNV1_RF	Benign	0.0
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

Other links and lift over

dbSNP: rs57859179; hg19: chr3-180334063;