rs751844801

Variant names:

• chr3-180614924-T-C
• rs751844801
• NM_181426.2:c.2823A>G

Variant summary

Our verdict is Likely benign. The variant received -6 ACMG points: 0P and 6B. BP4_Strong BP6 BP7

The NM_181426.2(CCDC39):​c.2823A>G​(p.Lys941Lys) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000192 in 1,558,544 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 Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000021 (0 hom.)
• Consequence: CCDC39 NM_181426.2 synonymous
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:2
• Conservation: PhyloP100: 0.0610
• Publications: 0 publications found

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]

ENSG00000145075 (HGNC:):

ACMG classification

Our verdict: Likely_benign. The variant received -6 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.8).
• BP6: Variant 3-180614924-T-C is Benign according to our data. Variant chr3-180614924-T-C is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 262972.
• BP7: Synonymous conserved (PhyloP=0.061 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_181426.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CCDC39	NM_181426.2	MANE Select	c.2823A>G	p.Lys941Lys	synonymous	Exon 20 of 20	NP_852091.1
	TTC14	NM_001288582.2		c.1775-2456T>C		intron	N/A	NP_001275511.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CCDC39	ENST00000476379.6	TSL:2 MANE Select	c.2823A>G	p.Lys941Lys	synonymous	Exon 20 of 20	ENSP00000417960.2
	TTC14	ENST00000382584.8	TSL:1	c.1775-2456T>C		intron	N/A	ENSP00000372027.4
	CCDC39	ENST00000651046.1		c.2631A>G	p.Lys877Lys	synonymous	Exon 19 of 19	ENSP00000499175.1

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152162 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

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: 0.0000147

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000233 AC: 4 AN: 171462 AF XY: 0.0000221

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: 0.0000433

Gnomad OTH exome AF: 0.000214

GnomAD4 exome AF: 0.0000206 AC: 29 AN: 1406382 Hom.: 0 Cov.: 30 AF XY: 0.0000230 AC XY: 16 AN XY: 694280

African (AFR) AF: 0.00 AC: 0 AN: 32218

American (AMR) AF: 0.00 AC: 0 AN: 36334

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25268

East Asian (EAS) AF: 0.00 AC: 0 AN: 37230

South Asian (SAS) AF: 0.00 AC: 0 AN: 79158

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 50154

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5680

European-Non Finnish (NFE) AF: 0.0000250 AC: 27 AN: 1082026

Other (OTH) AF: 0.0000343 AC: 2 AN: 58314

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152162 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74330

African (AFR) AF: 0.00 AC: 0 AN: 41448

American (AMR) AF: 0.00 AC: 0 AN: 15272

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5202

South Asian (SAS) AF: 0.00 AC: 0 AN: 4830

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10626

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 67992

Other (OTH) AF: 0.00 AC: 0 AN: 2092

Alfa AF: 0.0000196 Hom.: 0

Bravo AF: 0.00000378

ClinVar

ClinVar submissions as Germline

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	-	1	not specified (1)
-	-	1	Primary ciliary dyskinesia (1)
-	1	-	Primary ciliary dyskinesia 14 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.80
CADD	Benign	1.5
DANN	Benign	0.85
PhyloP100		0.061

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: rs751844801; hg19: chr3-180332712;