17-80065511-C-A

Position:

chr17-80065511-C-A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_017950.4(CCDC40):c.1467C>A(p.Ser489Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000122 in 1,613,112 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S489I) has been classified as Benign.

Frequency

Genomes: 𝑓 0.000085 ( 0 hom., cov: 29)

Exomes 𝑓: 0.00013 ( 0 hom. )

Consequence

CCDC40
NM_017950.4 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: -0.209

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 links:

(HGNC:):

links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.008938849).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
CCDC40	NM_017950.4 linkuse as main transcript	c.1467C>A	p.Ser489Arg	missense_variant	10/20	ENST00000397545.9
LOC124904074	XR_007065931.1 linkuse as main transcript	n.305+5721G>T		intron_variant, non_coding_transcript_variant
CCDC40	NM_001243342.2 linkuse as main transcript	c.1467C>A	p.Ser489Arg	missense_variant	10/18
CCDC40	NM_001330508.2 linkuse as main transcript	c.1467C>A	p.Ser489Arg	missense_variant	10/11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CCDC40	ENST00000397545.9 linkuse as main transcript	c.1467C>A	p.Ser489Arg	missense_variant	10/20	5	NM_017950.4	P2	Q4G0X9-1
	ENST00000695611.1 linkuse as main transcript	n.313+5721G>T		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes

AF:

0.0000855

AC:

AN:

152038

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00145

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.0000588

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000257

AC:

AN:

248774

Hom.:

AF XY:

0.000288

AC XY:

AN XY:

135250

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000377

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00118

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000124

Gnomad OTH exome

AF:

0.000165

GnomAD4 exome

AF:

0.000125

AC:

183

AN:

1460956

Hom.:

Cov.:

AF XY:

0.000153

AC XY:

111

AN XY:

726812

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000358

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.00128

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000414

Gnomad4 OTH exome

AF:

0.000116

GnomAD4 genome

AF:

0.0000854

AC:

AN:

152156

Hom.:

Cov.:

AF XY:

0.000121

AC XY:

AN XY:

74372

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00145

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000588

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000680

ExAC

AF:

0.000306

AC:

Asia WGS

AF:

0.000866

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000178

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2Benign:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Primary ciliary dyskinesia

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Ambry Genetics	Sep 17, 2018	The p.S489R variant (also known as c.1467C>A), located in coding exon 10 of the CCDC40 gene, results from a C to A substitution at nucleotide position 1467. The serine at codon 489 is replaced by arginine, an amino acid with dissimilar properties. This amino acid position is poorly conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -
Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Aug 24, 2023	This sequence change replaces serine, which is neutral and polar, with arginine, which is basic and polar, at codon 489 of the CCDC40 protein (p.Ser489Arg). 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. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt CCDC40 protein function. ClinVar contains an entry for this variant (Variation ID: 407772). This variant has not been reported in the literature in individuals affected with CCDC40-related conditions. This variant is present in population databases (rs200154414, gnomAD 0.1%). -

not provided

Benign:2

Likely benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Likely benign, no assertion criteria provided	clinical testing	Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)	-	- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.27

BayesDel_addAF

Benign

-0.31

BayesDel_noAF

Benign

-0.26

CADD

Benign

0.62

DANN

Benign

0.68

DEOGEN2

Benign

0.099

.;T;.

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.2

FATHMM_MKL

Benign

0.073

LIST_S2

Benign

0.61

T;T;T

M_CAP

Uncertain

0.11

MetaRNN

Benign

0.0089

T;T;T

MetaSVM

Benign

-0.80

MutationAssessor

Benign

0.90

L;L;L

MutationTaster

Benign

1.0

N;N;N;N

PrimateAI

Benign

0.30

PROVEAN

Benign

-1.5

N;N;N

REVEL

Benign

0.12

Sift

Benign

0.55

T;T;T

Sift4G

Benign

0.53

T;T;T

Polyphen

0.23

.;B;.

Vest4

0.26

MutPred

0.22

Gain of MoRF binding (P = 0.0147);Gain of MoRF binding (P = 0.0147);Gain of MoRF binding (P = 0.0147);

MVP

0.27

MPC

0.28

ClinPred

0.017

GERP RS

0.19

Varity_R

0.049

gMVP

0.099

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over