chr17-80084869-A-G

Variant names:

• chr17-80084869-A-G
• rs770751519
• NM_017950.4:c.2116A>G

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_017950.4(CCDC40):​c.2116A>G​(p.Asn706Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000342 in 1,461,838 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/22 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. N706S) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: CCDC40 NM_017950.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.04
• Publications: 0 publications found

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

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.14221394).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_017950.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CCDC40	NM_017950.4	MANE Select	c.2116A>G	p.Asn706Asp	missense	Exon 13 of 20	NP_060420.2
	CCDC40	NM_001243342.2		c.2116A>G	p.Asn706Asp	missense	Exon 13 of 18	NP_001230271.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CCDC40	ENST00000397545.9	TSL:5 MANE Select	c.2116A>G	p.Asn706Asp	missense	Exon 13 of 20	ENSP00000380679.4
	CCDC40	ENST00000574799.5	TSL:1	n.1653A>G		non_coding_transcript_exon	Exon 9 of 16
	CCDC40	ENST00000374877.7	TSL:5	c.2116A>G	p.Asn706Asp	missense	Exon 13 of 18	ENSP00000364011.3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD2 exomes AF: 0.0000241 AC: 6 AN: 249398 AF XY: 0.00000739

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000174

Gnomad ASJ exome AF: 0.00

Gnomad EAS 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: 0.00000342 AC: 5 AN: 1461838 Hom.: 0 Cov.: 33 AF XY: 0.00000138 AC XY: 1 AN XY: 727210

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.000112 AC: 5 AN: 44720

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53370

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1112010

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000151

ExAC AF: 0.0000330 AC: 4

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Primary ciliary dyskinesia (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.15
BayesDel_addAF	Benign	-0.49	T
BayesDel_noAF	Benign	-0.67
CADD	Benign	16
DANN	Uncertain	0.99
DEOGEN2	Benign	0.18	T
Eigen	Benign	-0.28
Eigen_PC	Benign	-0.38
FATHMM_MKL	Benign	0.22	N
LIST_S2	Benign	0.64	T
M_CAP	Benign	0.022	T
MetaRNN	Benign	0.14	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.5	M
PhyloP100		1.0
PrimateAI	Benign	0.44	T
PROVEAN	Uncertain	-3.2	D
REVEL	Benign	0.090
Sift	Benign	0.14	T
Sift4G	Benign	0.36	T
Polyphen		0.84	P
Vest4		0.32
MutPred		0.26		Loss of methylation at K704 (P = 0.0601)
MVP		0.23
MPC		0.32
ClinPred		0.55	D
GERP RS		3.1
Varity_R		0.15
gMVP		0.40
Mutation Taster		=99/1	polymorphism

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

Other links and lift over

dbSNP: rs770751519; hg19: chr17-78058668;