17-80097250-C-T

Variant names:

• chr17-80097250-C-T
• rs79588289
• NM_017950.4:c.3027C>T

Variant summary

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

The NM_017950.4(CCDC40):​c.3027C>T​(p.Thr1009Thr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000874 in 1,613,892 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). Synonymous variant affecting the same amino acid position (i.e. T1009T) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.00014 (0 hom., cov: 33)
  • Exomes 𝑓: 0.000081 (0 hom.)
• Consequence: CCDC40 NM_017950.4 synonymous
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:3
• Conservation: PhyloP100: -0.581
• Publications: 0 publications found

Genes affected

CCDC40 (HGNC:26090): (coiled-coil domain 40 molecular ruler complex subunit) This gene encodes a protein that is necessary for motile cilia function. It functions in correct left-right axis formation by regulating the assembly of the inner dynein arm and the dynein regulatory complexes, which control ciliary beat. Mutations in this gene cause ciliary dyskinesia type 15, a disorder due to defects in cilia motility. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Aug 2011]

CCDC40 Gene-Disease associations (from GenCC):

• primary ciliary dyskinesia 15

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), ClinGen, G2P, Ambry Genetics, Laboratory for Molecular Medicine
• primary ciliary dyskinesia

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• autoimmune disease

  Inheritance: AR Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

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

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.69).
• BP6: Variant 17-80097250-C-T is Benign according to our data. Variant chr17-80097250-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 260969.
• BP7: Synonymous conserved (PhyloP=-0.581 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_017950.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CCDC40	NM_017950.4	MANE Select	c.3027C>T	p.Thr1009Thr	synonymous	Exon 19 of 20	NP_060420.2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CCDC40	ENST00000397545.9	TSL:5 MANE Select	c.3027C>T	p.Thr1009Thr	synonymous	Exon 19 of 20	ENSP00000380679.4	Q4G0X9-1
	CCDC40	ENST00000574799.5	TSL:1	n.2564C>T		non_coding_transcript_exon	Exon 15 of 16
	CCDC40	ENST00000897784.1		c.3219C>T	p.Thr1073Thr	synonymous	Exon 20 of 21	ENSP00000567843.1

Frequencies

GnomAD3 genomes AF: 0.000145 AC: 22 AN: 152164 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00173

Gnomad SAS AF: 0.00186

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000441

Gnomad OTH AF: 0.000478

GnomAD2 exomes AF: 0.000172 AC: 43 AN: 249408 AF XY: 0.000185

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000579

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00145

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000884

Gnomad OTH exome AF: 0.000165

GnomAD4 exome AF: 0.0000814 AC: 119 AN: 1461610 Hom.: 0 Cov.: 31 AF XY: 0.0000990 AC XY: 72 AN XY: 727096

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.0000224 AC: 1 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.000831 AC: 33 AN: 39700

South Asian (SAS) AF: 0.000441 AC: 38 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53176

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 0.0000234 AC: 26 AN: 1111976

Other (OTH) AF: 0.000348 AC: 21 AN: 60394

GnomAD4 genome AF: 0.000144 AC: 22 AN: 152282 Hom.: 0 Cov.: 33 AF XY: 0.000188 AC XY: 14 AN XY: 74456

African (AFR) AF: 0.00 AC: 0 AN: 41544

American (AMR) AF: 0.00 AC: 0 AN: 15302

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

East Asian (EAS) AF: 0.00173 AC: 9 AN: 5190

South Asian (SAS) AF: 0.00186 AC: 9 AN: 4828

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10614

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.0000441 AC: 3 AN: 68010

Other (OTH) AF: 0.000473 AC: 1 AN: 2116

Alfa AF: 0.0000494 Hom.: 0

Bravo AF: 0.0000680

Asia WGS AF: 0.00520 AC: 18 AN: 3478

ClinVar

ClinVar submissions

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	-	2	Primary ciliary dyskinesia (2)
-	-	1	not specified (1)
-	1	-	Primary ciliary dyskinesia 15 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.69
CADD	Benign	2.3
DANN	Benign	0.78
PhyloP100		-0.58
Mutation Taster		=99/1	polymorphism

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: rs79588289; hg19: chr17-78071049;