NM_017950.4:c.2727T>C

Variant names:

• chr17-80089779-T-C
• rs1555593479
• NM_017950.4:c.2727T>C

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 2P and 7B. PM2 BP4_Strong BP6_Moderate BP7

The NM_017950.4(CCDC40):​c.2727T>C​(p.Leu909Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: CCDC40 NM_017950.4 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -2.32
• 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: Likely_benign. The variant received -5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.53).
• BP6: Variant 17-80089779-T-C is Benign according to our data. Variant chr17-80089779-T-C is described in ClinVar as Likely_benign. ClinVar VariationId is 525493.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=-2.32 with no splicing effect.

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.2727T>C	p.Leu909Leu	synonymous	Exon 17 of 20	NP_060420.2
	CCDC40	NM_001243342.2		c.2727T>C	p.Leu909Leu	synonymous	Exon 17 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.2727T>C	p.Leu909Leu	synonymous	Exon 17 of 20	ENSP00000380679.4
	CCDC40	ENST00000574799.5	TSL:1	n.2264T>C		non_coding_transcript_exon	Exon 13 of 16
	CCDC40	ENST00000374877.7	TSL:5	c.2727T>C	p.Leu909Leu	synonymous	Exon 17 of 18	ENSP00000364011.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Primary ciliary dyskinesia Benign:1

Nov 08, 2017

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.53
CADD	Benign	0.70
DANN	Benign	0.71
PhyloP100		-2.3

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: rs1555593479; hg19: chr17-78063578;