NM_181426.2(CCDC39):c.2758A>G (p.Ser920Gly) AND Primary ciliary dyskinesia

Germline classification:: Uncertain significance (2 submissions)
Last evaluated:: Aug 7, 2022
Review status:: 2 stars out of maximum of 4 stars
criteria provided, multiple submitters, no conflicts

Somatic classification of clinical impact:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Somatic classification of oncogenicity:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Record status:: current
Accession:: RCV000804359.13

Allele description [Variation Report for NM_181426.2(CCDC39):c.2758A>G (p.Ser920Gly)]

NM_181426.2(CCDC39):c.2758A>G (p.Ser920Gly)

Genes:

CCDC39:coiled-coil domain 39 molecular ruler complex subunit [Gene - OMIM - HGNC]
TTC14:tetratricopeptide repeat domain 14 [Gene - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

3q26.33

Genomic location:

Preferred name:

NM_181426.2(CCDC39):c.2758A>G (p.Ser920Gly)

HGVS:

NC_000003.12:g.180614989T>C
NG_029581.1:g.69507A>G
NM_001288582.2:c.1775-2391T>C
NM_181426.2:c.2758A>GMANE SELECT
NP_852091.1:p.Ser920Gly
NC_000003.11:g.180332777T>C
NM_181426.1:c.2758A>G

Protein change:

S920G

Links:

dbSNP: rs977401121

NCBI 1000 Genomes Browser:

rs977401121

Molecular consequence:

NM_001288582.2:c.1775-2391T>C - intron variant - [Sequence Ontology: SO:0001627]
NM_181426.2:c.2758A>G - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:: Primary ciliary dyskinesia
Synonyms:: Ciliary dyskinesia
Identifiers:: MONDO: MONDO:0016575; MedGen: C0008780; OMIM: PS244400; Human Phenotype Ontology: HP:0012265

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV000944265	Invitae	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Mar 4, 2022)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]
SCV002752001	Ambry Genetics	criteria provided, single submitter (Ambry Variant Classification Scheme 2023)	Uncertain significance (Aug 7, 2022)	germline	clinical testing	Citation Link

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV000944265

Invitae

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Mar 4, 2022)

germline

clinical testing

PubMed (1)
[See all records that cite this PMID]

SCV002752001

Ambry Genetics

criteria provided, single submitter

(Ambry Variant Classification Scheme 2023)

Uncertain significance
(Aug 7, 2022)

germline

clinical testing

Citation Link

Help

Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
not provided	germline	unknown	not provided	not provided	not provided	not provided	not provided	clinical testing

Citations

PubMed

Sherloc: a comprehensive refinement of the ACMG-AMP variant classification criteria.

Nykamp K, Anderson M, Powers M, Garcia J, Herrera B, Ho YY, Kobayashi Y, Patil N, Thusberg J, Westbrook M; Invitae Clinical Genomics Group., Topper S.

Genet Med. 2017 Oct;19(10):1105-1117. doi: 10.1038/gim.2017.37. Epub 2017 May 11. Erratum in: Genet Med. 2020 Jan;22(1):240. doi: 10.1038/s41436-019-0624-9.

PubMed [citation]

PMID:: 28492532
PMCID:: PMC5632818

Details of each submission

From Invitae, SCV000944265.3

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (1)

Description

This sequence change replaces serine, which is neutral and polar, with glycine, which is neutral and non-polar, at codon 920 of the CCDC39 protein (p.Ser920Gly). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This variant has not been reported in the literature in individuals affected with CCDC39-related conditions. ClinVar contains an entry for this variant (Variation ID: 649426). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Not Available"; Align-GVGD: "Class C0". The glycine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. 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.

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

From Ambry Genetics, SCV002752001.2

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	not provided

Description

The p.S920G variant (also known as c.2758A>G), located in coding exon 20 of the CCDC39 gene, results from an A to G substitution at nucleotide position 2758. The serine at codon 920 is replaced by glycine, an amino acid with similar properties. This amino acid position is conserved. 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.

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

Last Updated: Aug 4, 2024

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