chr17-80065489-G-A

Position:

chr17-80065489-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_017950.4(CCDC40):c.1445G>A(p.Cys482Tyr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000354 in 1,611,408 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00026 ( 0 hom., cov: 29)

Exomes 𝑓: 0.000012 ( 0 hom. )

Consequence

CCDC40
NM_017950.4 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 0.513

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 Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.13356513).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
CCDC40	NM_017950.4 linkuse as main transcript	c.1445G>A	p.Cys482Tyr	missense_variant	10/20	ENST00000397545.9
LOC124904074	XR_007065931.1 linkuse as main transcript	n.305+5743C>T		intron_variant, non_coding_transcript_variant
CCDC40	NM_001243342.2 linkuse as main transcript	c.1445G>A	p.Cys482Tyr	missense_variant	10/18
CCDC40	NM_001330508.2 linkuse as main transcript	c.1445G>A	p.Cys482Tyr	missense_variant	10/11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CCDC40	ENST00000397545.9 linkuse as main transcript	c.1445G>A	p.Cys482Tyr	missense_variant	10/20	5	NM_017950.4	P2	Q4G0X9-1
	ENST00000695611.1 linkuse as main transcript	n.313+5743C>T		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes

AF:

0.000265

AC:

AN:

150738

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000854

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000330

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000483

AC:

AN:

248442

Hom.:

AF XY:

0.0000444

AC XY:

AN XY:

135156

show subpopulations

Gnomad AFR exome

AF:

0.000784

Gnomad AMR exome

AF:

0.00

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000123

AC:

AN:

1460554

Hom.:

Cov.:

AF XY:

0.0000110

AC XY:

AN XY:

726598

show subpopulations

Gnomad4 AFR exome

AF:

0.000478

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.000259

AC:

AN:

150854

Hom.:

Cov.:

AF XY:

0.000231

AC XY:

AN XY:

73710

show subpopulations

Gnomad4 AFR

AF:

0.000827

Gnomad4 AMR

AF:

0.000330

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:

0.000212

Hom.:

Bravo

AF:

0.000264

ESP6500AA

AF:

0.000477

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000578

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:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Aug 28, 2021

This sequence change replaces cysteine with tyrosine at codon 482 of the CCDC40 protein (p.Cys482Tyr). The cysteine residue is moderately conserved and there is a large physicochemical difference between cysteine and tyrosine. This variant is present in population databases (rs367601192, ExAC 0.07%). This variant has not been reported in the literature in individuals affected with CCDC40-related conditions. 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. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

not provided

Breakthrough Genomics, Breakthrough Genomics

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.17

BayesDel_addAF

Benign

-0.37

BayesDel_noAF

Benign

-0.40

CADD

Benign

DANN

Benign

0.87

DEOGEN2

Benign

0.37

.;T;.

Eigen

Benign

-0.39

Eigen_PC

Benign

-0.56

FATHMM_MKL

Benign

0.16

LIST_S2

Benign

0.61

T;T;T

M_CAP

Benign

0.014

MetaRNN

Benign

0.13

T;T;T

MetaSVM

Benign

-0.96

MutationAssessor

Uncertain

2.4

M;M;M

MutationTaster

Benign

1.0

D;N;N;N

PrimateAI

Benign

0.43

PROVEAN

Uncertain

-3.5

D;D;D

REVEL

Benign

0.13

Sift

Benign

0.061

T;T;D

Sift4G

Benign

0.28

T;T;D

Polyphen

0.97

.;D;.

Vest4

0.58

MVP

0.31

MPC

0.31

ClinPred

0.20

GERP RS

1.6

Varity_R

0.10

gMVP

0.14

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