4-15560553-G-A

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 1P and 3B. PP3BP4_ModerateBP6

The NM_001378615.1(CC2D2A):c.2945G>A(p.Arg982His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000119 in 1,517,768 control chromosomes in the GnomAD database, with no homozygous occurrence. 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 0.00057 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000070 ( 0 hom. )

Consequence

CC2D2A
NM_001378615.1 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4B:3

Conservation

PhyloP100: 8.95

Publications

3 publications found

Variant links:

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]

CC2D2A Gene-Disease associations (from GenCC):

ciliopathy
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
Joubert syndrome 9
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp, G2P
retinitis pigmentosa 93
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
COACH syndrome 1
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
Joubert syndrome with oculorenal defect
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
Meckel syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

CC2D2A links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PP3

Multiple lines of computational evidence support a deleterious effect 7: BayesDel_noAF, Cadd, Dann, Eigen, phyloP100way_vertebrate, REVEL, REVEL [when AlphaMissense, max_spliceai, FATHMM_MKL, MetaRNN, MutationTaster was below the threshold]

BP4

Computational evidence support a benign effect (MetaRNN=0.124498785).

BP6

Variant 4-15560553-G-A is Benign according to our data. Variant chr4-15560553-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 288560.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CC2D2A	NM_001378615.1 link	c.2945G>A	p.Arg982His	missense_variant	Exon 23 of 37	ENST00000424120.6	NP_001365544.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CC2D2A	ENST00000424120.6 link	c.2945G>A	p.Arg982His	missense_variant	Exon 23 of 37	5	NM_001378615.1	ENSP00000403465.1		Q9P2K1-4

Frequencies

GnomAD3 genomes

AF:

0.000553

AC:

AN:

151960

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00184

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000197

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000579

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000202

AC:

AN:

227934

AF XY:

0.000121

show subpopulations

Gnomad AFR exome

AF:

0.00201

Gnomad AMR exome

AF:

0.000264

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000430

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000951

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000696

AC:

AN:

1365692

Hom.:

Cov.:

AF XY:

0.0000557

AC XY:

AN XY:

682484

show subpopulations

African (AFR)

AF:

0.00155

AC:

AN:

31066

American (AMR)

AF:

0.000315

AC:

AN:

41292

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25170

East Asian (EAS)

AF:

0.000184

AC:

AN:

38102

South Asian (SAS)

AF:

0.0000383

AC:

AN:

78362

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52860

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5580

European-Non Finnish (NFE)

AF:

0.0000145

AC:

AN:

1036152

Other (OTH)

AF:

0.000158

AC:

AN:

57108

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.414

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000566

AC:

AN:

152076

Hom.:

Cov.:

AF XY:

0.000605

AC XY:

AN XY:

74328

show subpopulations

African (AFR)

AF:

0.00188

AC:

AN:

41484

American (AMR)

AF:

0.000196

AC:

AN:

15268

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3466

East Asian (EAS)

AF:

0.000580

AC:

AN:

5170

South Asian (SAS)

AF:

0.00

AC:

AN:

4816

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10562

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

67988

Other (OTH)

AF:

0.00

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.504

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000184

Hom.:

Bravo

AF:

0.000570

ESP6500AA

AF:

0.00222

AC:

ESP6500EA

AF:

0.000123

AC:

ExAC

AF:

0.000224

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4Benign:3

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Jul 12, 2017

Eurofins Ntd Llc (ga)

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Sep 04, 2024

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Joubert syndrome 9;C2676790:Meckel syndrome, type 6;C5435651:COACH syndrome 1

Uncertain:1

Oct 31, 2018

Fulgent Genetics, Fulgent Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Intellectual disability

Uncertain:1

Dec 06, 2019

Cambridge Genomics Laboratory, East Genomic Laboratory Hub, NHS Genomic Medicine Service

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Inborn genetic diseases

Benign:1

Feb 14, 2022

Ambry Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Meckel-Gruber syndrome;C0431399:Joubert syndrome

Benign:1

Jan 14, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

CC2D2A-related disorder

Benign:1

Feb 07, 2023

PreventionGenetics, part of Exact Sciences

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

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: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Uncertain

0.012

BayesDel_noAF

Pathogenic

0.24

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.34

T;T

Eigen

Pathogenic

0.86

Eigen_PC

Pathogenic

0.85

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Pathogenic

0.98

D;.

M_CAP

Uncertain

0.096

MetaRNN

Benign

0.12

T;T

MetaSVM

Uncertain

0.21

MutationAssessor

Uncertain

2.5

M;M

PhyloP100

9.0

PrimateAI

Uncertain

0.52

PROVEAN

Uncertain

-3.8

D;D

REVEL

Pathogenic

0.67

Sift

Uncertain

0.0030

D;D

Sift4G

Uncertain

0.0020

D;D

Polyphen

1.0

D;D

Vest4

0.76

MVP

0.95

MPC

0.16

ClinPred

0.11

GERP RS

5.6

Varity_R

0.52

gMVP

0.63

Mutation Taster

=58/42

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over