4-15557482-G-A
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Variant summary
Our verdict is Benign. Variant got -13 ACMG points: 0P and 13B. BP4_StrongBP6BS1BS2
The NM_001378615.1(CC2D2A):c.2804G>A(p.Arg935Gln) variant causes a missense change. The variant allele was found at a frequency of 0.000292 in 1,607,652 control chromosomes in the GnomAD database, including 10 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).
Frequency
Genomes: 𝑓 0.0014 ( 5 hom., cov: 32)
Exomes 𝑓: 0.00018 ( 5 hom. )
Consequence
CC2D2A
NM_001378615.1 missense
NM_001378615.1 missense
Scores
4
5
9
Clinical Significance
Conservation
PhyloP100: 6.83
Genes affected
CC2D2A (HGNC:29253): (coiled-coil and C2 domain containing 2A) This gene encodes a coiled-coil and calcium binding domain protein that appears to play a critical role in cilia formation. Mutations in this gene cause Meckel syndrome type 6, as well as Joubert syndrome type 9. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Sep 2009]
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ACMG classification
Classification made for transcript
Verdict is Benign. Variant got -13 ACMG points.
BP4
Computational evidence support a benign effect (MetaRNN=0.007872403).
BP6
Variant 4-15557482-G-A is Benign according to our data. Variant chr4-15557482-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 126234.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=3, Uncertain_significance=5}.
BS1
Variant frequency is greater than expected in population amr. gnomad4 allele frequency = 0.00141 (214/152272) while in subpopulation AMR AF= 0.0134 (205/15286). AF 95% confidence interval is 0.0119. There are 5 homozygotes in gnomad4. There are 141 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
BS2
High Homozygotes in GnomAd4 at 5 AR gene
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
CC2D2A | NM_001378615.1 | c.2804G>A | p.Arg935Gln | missense_variant | 21/37 | ENST00000424120.6 | NP_001365544.1 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
CC2D2A | ENST00000424120.6 | c.2804G>A | p.Arg935Gln | missense_variant | 21/37 | 5 | NM_001378615.1 | ENSP00000403465 | P1 |
Frequencies
GnomAD3 genomes AF: 0.00141 AC: 214AN: 152154Hom.: 5 Cov.: 32
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GnomAD3 exomes AF: 0.000573 AC: 136AN: 237286Hom.: 1 AF XY: 0.000598 AC XY: 77AN XY: 128766
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GnomAD4 exome AF: 0.000176 AC: 256AN: 1455380Hom.: 5 Cov.: 31 AF XY: 0.000181 AC XY: 131AN XY: 723560
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GnomAD4 genome AF: 0.00141 AC: 214AN: 152272Hom.: 5 Cov.: 32 AF XY: 0.00189 AC XY: 141AN XY: 74466
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ClinVar
Significance: Conflicting classifications of pathogenicity
Submissions summary: Uncertain:5Benign:4
Revision: criteria provided, conflicting classifications
LINK: link
Submissions by phenotype
not provided Uncertain:1Benign:1
Likely benign, criteria provided, single submitter | clinical testing | GeneDx | Sep 10, 2020 | - - |
Uncertain significance, criteria provided, single submitter | clinical testing | Mayo Clinic Laboratories, Mayo Clinic | May 23, 2023 | - - |
Joubert syndrome 9;C2676790:Meckel syndrome, type 6;C5435651:COACH syndrome 1 Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Fulgent Genetics, Fulgent Genetics | May 23, 2017 | - - |
Meckel-Gruber syndrome Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Genetic Services Laboratory, University of Chicago | Aug 07, 2013 | - - |
Meckel syndrome, type 6 Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Jan 13, 2018 | This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. - |
Joubert syndrome 9 Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Jan 13, 2018 | This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. - |
not specified Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Eurofins Ntd Llc (ga) | Jan 10, 2017 | - - |
Meckel-Gruber syndrome;C0431399:Familial aplasia of the vermis Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Labcorp Genetics (formerly Invitae), Labcorp | Jan 29, 2024 | - - |
CC2D2A-related disorder Benign:1
Likely benign, no assertion criteria provided | clinical testing | PreventionGenetics, part of Exact Sciences | Jan 31, 2022 | This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
BayesDel_addAF
Benign
T
BayesDel_noAF
Benign
CADD
Pathogenic
DANN
Pathogenic
DEOGEN2
Benign
T;T
Eigen
Pathogenic
Eigen_PC
Pathogenic
FATHMM_MKL
Pathogenic
D
LIST_S2
Uncertain
D;.
MetaRNN
Benign
T;T
MetaSVM
Uncertain
D
MutationAssessor
Uncertain
M;M
MutationTaster
Benign
D;D;D;D
PrimateAI
Benign
T
PROVEAN
Benign
N;N
REVEL
Uncertain
Sift
Benign
T;T
Sift4G
Uncertain
T;T
Polyphen
D;D
Vest4
MVP
MPC
ClinPred
T
GERP RS
Varity_R
gMVP
Splicing
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at