rs74692882

Variant names:

Variant summary

Our verdict is Benign. The variant received -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BA1

The NM_017950.4(CCDC40):c.1131C>T(p.Cys377Cys) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00278 in 1,583,052 control chromosomes in the GnomAD database, including 108 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.015 ( 56 hom., cov: 32)

Exomes 𝑓: 0.0015 ( 52 hom. )

Consequence

CCDC40
NM_017950.4 synonymous

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:7

Conservation

PhyloP100: -0.581

Publications

2 publications found

Variant links:

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: G2P, ClinGen, Ambry Genetics, Labcorp Genetics (formerly Invitae), PanelApp Australia, Laboratory for Molecular Medicine
primary ciliary dyskinesia
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
autoimmune disease
Inheritance: AR Classification: LIMITED Submitted by: Ambry Genetics

CCDC40 links:

ENSG00000289689 (HGNC:):

ENSG00000289689 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -21 ACMG points.

BP4

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

BP6

Variant 17-80050255-C-T is Benign according to our data. Variant chr17-80050255-C-T is described in ClinVar as Benign. ClinVar VariationId is 226486.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-0.581 with no splicing effect.

BA1

GnomAdExome4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0536 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CCDC40	NM_017950.4 link	c.1131C>T	p.Cys377Cys	synonymous_variant	Exon 7 of 20	ENST00000397545.9	NP_060420.2	Q4G0X9-1
CCDC40	NM_001243342.2 link	c.1131C>T	p.Cys377Cys	synonymous_variant	Exon 7 of 18		NP_001230271.1	Q4G0X9-2
CCDC40	NM_001330508.2 link	c.1131C>T	p.Cys377Cys	synonymous_variant	Exon 7 of 11		NP_001317437.1	Q4G0X9-4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CCDC40	ENST00000397545.9 link	c.1131C>T	p.Cys377Cys	synonymous_variant	Exon 7 of 20	5	NM_017950.4	ENSP00000380679.4		Q4G0X9-1

Frequencies

GnomAD3 genomes

AF:

0.0148

AC:

2251

AN:

152160

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0518

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00484

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.0115

GnomAD2 exomes

AF:

0.00351

AC:

675

AN:

192176

AF XY:

0.00253

show subpopulations

Gnomad AFR exome

AF:

0.0562

Gnomad AMR exome

AF:

0.00234

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000975

Gnomad OTH exome

AF:

0.00140

GnomAD4 exome

AF:

0.00150

AC:

2145

AN:

1430774

Hom.:

Cov.:

AF XY:

0.00121

AC XY:

856

AN XY:

709618

show subpopulations

African (AFR)

AF:

0.0557

AC:

1817

AN:

32598

American (AMR)

AF:

0.00252

AC:

100

AN:

39734

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25606

East Asian (EAS)

AF:

0.00

AC:

AN:

37842

South Asian (SAS)

AF:

0.000133

AC:

AN:

82906

European-Finnish (FIN)

AF:

0.00

AC:

AN:

50356

Middle Eastern (MID)

AF:

0.00169

AC:

AN:

4136

European-Non Finnish (NFE)

AF:

0.0000364

AC:

AN:

1098456

Other (OTH)

AF:

0.00287

AC:

170

AN:

59140

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.489

Heterozygous variant carriers

131

262

392

523

654

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

116

174

232

290

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0148

AC:

2251

AN:

152278

Hom.:

Cov.:

AF XY:

0.0146

AC XY:

1088

AN XY:

74444

show subpopulations

African (AFR)

AF:

0.0516

AC:

2146

AN:

41556

American (AMR)

AF:

0.00484

AC:

AN:

15304

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5158

South Asian (SAS)

AF:

0.000415

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10620

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000735

AC:

AN:

68024

Other (OTH)

AF:

0.0113

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.499

Heterozygous variant carriers

108

216

325

433

541

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

104

130

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00742

Hom.:

Bravo

AF:

0.0169

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Benign

Submissions summary: Benign:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:2

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Feb 21, 2013

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Cys377Cys in exon 7 of CCDC40: This variant is not expected to have clinical sig nificance because it does not alter an amino acid residue and is not located wit hin the splice consensus sequence. It has been identified in 4.3% (177/4126) of African American chromosomes from a broad population by the NHLBI Exome Sequenci ng Project (http://evs.gs.washington.edu/EVS; dbSNP rs74692882). -

Primary ciliary dyskinesia

Benign:2

Jan 29, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Mar 13, 2017

Ambry Genetics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

not provided

Benign:2

Breakthrough Genomics, Breakthrough Genomics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Jul 09, 2018

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Primary ciliary dyskinesia 15

Benign:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

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

-0.76

CADD

Benign

5.8

(source)

DANN

Benign

0.47

PhyloP100

-0.58

Mutation Taster

=87/13

polymorphism

(source)

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over