NM_017950.4:c.1127C>G

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_017950.4(CCDC40):c.1127C>G(p.Thr376Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000219 in 1,585,132 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Synonymous variant affecting the same amino acid position (i.e. T376T) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000053 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00024 ( 0 hom. )

Consequence

CCDC40
NM_017950.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 1.11

Publications

0 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: Likely_benign. The variant received -2 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.15171096).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein
CCDC40	NM_017950.4 link	c.1127C>G	p.Thr376Ser	missense_variant	Exon 7 of 20	ENST00000397545.9	NP_060420.2
CCDC40	NM_001243342.2 link	c.1127C>G	p.Thr376Ser	missense_variant	Exon 7 of 18		NP_001230271.1
CCDC40	NM_001330508.2 link	c.1127C>G	p.Thr376Ser	missense_variant	Exon 7 of 11		NP_001317437.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CCDC40	ENST00000397545.9 link	c.1127C>G	p.Thr376Ser	missense_variant	Exon 7 of 20	5	NM_017950.4	ENSP00000380679.4

Frequencies

GnomAD3 genomes

AF:

0.0000526

AC:

AN:

152190

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

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:

0.0000882

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000562

AC:

AN:

195568

AF XY:

0.0000468

show subpopulations

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:

0.000119

Gnomad OTH exome

AF:

0.000198

GnomAD4 exome

AF:

0.000237

AC:

339

AN:

1432942

Hom.:

Cov.:

AF XY:

0.000222

AC XY:

158

AN XY:

710846

show subpopulations

African (AFR)

AF:

0.0000306

AC:

AN:

32658

American (AMR)

AF:

0.00

AC:

AN:

40078

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25636

East Asian (EAS)

AF:

0.00

AC:

AN:

38008

South Asian (SAS)

AF:

0.00

AC:

AN:

83180

European-Finnish (FIN)

AF:

0.00

AC:

AN:

50466

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4150

European-Non Finnish (NFE)

AF:

0.000306

AC:

336

AN:

1099556

Other (OTH)

AF:

0.0000338

AC:

AN:

59210

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.467

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

100

<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:

0.0000526

AC:

AN:

152190

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74346

show subpopulations

African (AFR)

AF:

0.0000483

AC:

AN:

41438

American (AMR)

AF:

0.00

AC:

AN:

15286

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5182

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10626

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000882

AC:

AN:

68040

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.456

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<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:

0.000113

Hom.:

Bravo

AF:

0.0000529

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000239

AC:

ExAC

AF:

0.0000421

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Primary ciliary dyskinesia

Uncertain:2

Jan 21, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.1127C>G (p.T376S) alteration is located in exon 7 (coding exon 7) of the CCDC40 gene. This alteration results from a C to G substitution at nucleotide position 1127, causing the threonine (T) at amino acid position 376 to be replaced by a serine (S). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Jan 07, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces threonine, which is neutral and polar, with serine, which is neutral and polar, at codon 376 of the CCDC40 protein (p.Thr376Ser). This variant is present in population databases (rs372392201, gnomAD 0.01%). This variant has not been reported in the literature in individuals affected with CCDC40-related conditions. ClinVar contains an entry for this variant (Variation ID: 407775). Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.17

BayesDel_addAF

Benign

-0.38

BayesDel_noAF

Benign

-0.53

CADD

Benign

(source)

DANN

Benign

0.77

DEOGEN2

Benign

0.11

.;T;.;.

Eigen

Benign

-0.24

Eigen_PC

Benign

-0.33

FATHMM_MKL

Benign

0.38

LIST_S2

Benign

0.65

T;T;T;T

M_CAP

Benign

0.036

MetaRNN

Benign

0.15

T;T;T;T

MetaSVM

Benign

-0.81

MutationAssessor

Uncertain

2.7

M;M;M;M

PhyloP100

1.1

PrimateAI

Benign

0.44

PROVEAN

Benign

-1.5

N;N;N;N

REVEL

Benign

0.062

Sift

Benign

0.16

T;D;T;D

Sift4G

Benign

0.34

T;T;T;T

Polyphen

0.18, 0.99

.;B;.;D

Vest4

0.29

MutPred

0.23

Gain of MoRF binding (P = 0.11);Gain of MoRF binding (P = 0.11);Gain of MoRF binding (P = 0.11);Gain of MoRF binding (P = 0.11);

MVP

0.26

MPC

0.18

ClinPred

0.10

GERP RS

4.7

Varity_R

0.15

gMVP

0.083

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