rs199564182

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2BP4_StrongBP6

The NM_017950.4(CCDC40):c.1138G>A(p.Ala380Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000566 in 1,573,424 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00030 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000030 ( 0 hom. )

Consequence

CCDC40
NM_017950.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:1

Conservation

PhyloP100: 2.38

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.01526463).

BP6

Variant 17-80050262-G-A is Benign according to our data. Variant chr17-80050262-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 241231.We mark this variant Likely_benign, oryginal submissions are: {Benign=1, Uncertain_significance=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
CCDC40	NM_017950.4 linkuse as main transcript	c.1138G>A	p.Ala380Thr	missense_variant	7/20	ENST00000397545.9
CCDC40	NM_001243342.2 linkuse as main transcript	c.1138G>A	p.Ala380Thr	missense_variant	7/18
CCDC40	NM_001330508.2 linkuse as main transcript	c.1138G>A	p.Ala380Thr	missense_variant	7/11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CCDC40	ENST00000397545.9 linkuse as main transcript	c.1138G>A	p.Ala380Thr	missense_variant	7/20	5	NM_017950.4	P2	Q4G0X9-1
	ENST00000695611.1 linkuse as main transcript	n.1432-2743C>T		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes

AF:

0.000302

AC:

AN:

152182

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00104

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000884

AC:

AN:

181070

Hom.:

AF XY:

0.0000610

AC XY:

AN XY:

98346

show subpopulations

Gnomad AFR exome

AF:

0.00113

Gnomad AMR exome

AF:

0.000148

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000132

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000303

AC:

AN:

1421124

Hom.:

Cov.:

AF XY:

0.0000298

AC XY:

AN XY:

703922

show subpopulations

Gnomad4 AFR exome

AF:

0.000495

Gnomad4 AMR exome

AF:

0.000104

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000137

Gnomad4 OTH exome

AF:

0.000119

GnomAD4 genome

AF:

0.000302

AC:

AN:

152300

Hom.:

Cov.:

AF XY:

0.000269

AC XY:

AN XY:

74468

show subpopulations

Gnomad4 AFR

AF:

0.00103

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000486

Hom.:

Bravo

AF:

0.000310

ESP6500AA

AF:

0.000972

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000762

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Primary ciliary dyskinesia

Uncertain:1Benign:1

Benign, criteria provided, single submitter	clinical testing	Ambry Genetics	Nov 14, 2023	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. -
Uncertain significance, criteria provided, single submitter	clinical testing	Invitae	Aug 23, 2022	This sequence change replaces alanine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 380 of the CCDC40 protein (p.Ala380Thr). This variant is present in population databases (rs199564182, gnomAD 0.1%). 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: 241231). 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

0.085

BayesDel_addAF

Benign

-0.46

BayesDel_noAF

Benign

-0.48

Cadd

Benign

Dann

Benign

0.31

Eigen

Benign

-0.34

Eigen_PC

Benign

-0.35

FATHMM_MKL

Benign

0.14

LIST_S2

Benign

0.73

T;T;T;T

M_CAP

Benign

0.026

MetaRNN

Benign

0.015

T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.6

L;L;L;L

MutationTaster

Benign

1.0

N;N;N;N

PrimateAI

Benign

0.40

PROVEAN

Benign

-0.90

N;N;N;N

REVEL

Benign

0.043

Sift

Benign

0.38

T;T;T;T

Sift4G

Benign

0.58

T;T;D;D

Polyphen

0.089, 0.97

.;B;.;D

Vest4

0.17

MVP

0.32

MPC

0.18

ClinPred

0.045

GERP RS

4.7

Varity_R

0.055

gMVP

0.074

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

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