Genetic Variant CC2D2A:c.4065+28A>T (chr4-15586274-A-T) – ACMG Classification: Benign (-20 pts)

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBA1

The NM_001378615.1(CC2D2A):c.4065+28A>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.992 in 1,395,038 control chromosomes in the GnomAD database, including 686,809 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.96 ( 70174 hom., cov: 31)

Exomes 𝑓: 1.0 ( 616635 hom. )

Consequence

CC2D2A
NM_001378615.1 intron

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:6

Conservation

PhyloP100: 0.206

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.92).

BP6

Variant 4-15586274-A-T is Benign according to our data. Variant chr4-15586274-A-T is described in ClinVar as [Benign]. Clinvar id is 126243.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BA1

GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.993 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	Effect	Exon rank	MANE	Protein	UniProt
CC2D2A	NM_001378615.1 link	c.4065+28A>T	intron_variant	Intron 31 of 36	ENST00000424120.6	NP_001365544.1
CC2D2A	NM_001080522.2 link	c.4065+28A>T	intron_variant	Intron 32 of 37		NP_001073991.2	Q9P2K1-4
CC2D2A	NM_001378617.1 link	c.3918+28A>T	intron_variant	Intron 29 of 34		NP_001365546.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CC2D2A	ENST00000424120.6 link	c.4065+28A>T		intron_variant	Intron 31 of 36	5	NM_001378615.1	ENSP00000403465.1		Q9P2K1-4

Frequencies

GnomAD3 genomes

AF:

0.958

AC:

145776

AN:

152178

Hom.:

70128

Cov.:

show subpopulations

Gnomad AFR

AF:

0.854

Gnomad AMI

AF:

1.00

Gnomad AMR

AF:

0.983

Gnomad ASJ

AF:

1.00

Gnomad EAS

AF:

1.00

Gnomad SAS

AF:

1.00

Gnomad FIN

AF:

1.00

Gnomad MID

AF:

0.987

Gnomad NFE

AF:

0.999

Gnomad OTH

AF:

0.969

GnomAD3 exomes

AF:

0.990

AC:

205033

AN:

207164

Hom.:

101602

AF XY:

0.992

AC XY:

112364

AN XY:

113240

show subpopulations

Gnomad AFR exome

AF:

0.855

Gnomad AMR exome

AF:

0.993

Gnomad ASJ exome

AF:

1.00

Gnomad EAS exome

AF:

1.00

Gnomad SAS exome

AF:

1.00

Gnomad FIN exome

AF:

1.00

Gnomad NFE exome

AF:

1.00

Gnomad OTH exome

AF:

0.996

GnomAD4 exome

AF:

0.996

AC:

1237702

AN:

1242742

Hom.:

616635

Cov.:

AF XY:

0.996

AC XY:

616833

AN XY:

619042

show subpopulations

Gnomad4 AFR exome

AF:

0.858

Gnomad4 AMR exome

AF:

0.991

Gnomad4 ASJ exome

AF:

1.00

Gnomad4 EAS exome

AF:

1.00

Gnomad4 SAS exome

AF:

1.00

Gnomad4 FIN exome

AF:

1.00

Gnomad4 NFE exome

AF:

1.00

Gnomad4 OTH exome

AF:

0.990

GnomAD4 genome

AF:

0.958

AC:

145881

AN:

152296

Hom.:

70174

Cov.:

AF XY:

0.960

AC XY:

71458

AN XY:

74460

show subpopulations

Gnomad4 AFR

AF:

0.854

Gnomad4 AMR

AF:

0.983

Gnomad4 ASJ

AF:

1.00

Gnomad4 EAS

AF:

1.00

Gnomad4 SAS

AF:

0.999

Gnomad4 FIN

AF:

1.00

Gnomad4 NFE

AF:

0.999

Gnomad4 OTH

AF:

0.969

Alfa

AF:

0.981

Hom.:

13489

Bravo

AF:

0.953

Asia WGS

AF:

0.988

AC:

3437

AN:

3478

ClinVar

Significance: Benign

Submissions summary: Benign:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:2

PreventionGenetics, part of Exact Sciences

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Genetic Services Laboratory, University of Chicago

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

Likely benign based on allele frequency in 1000 Genomes Project or ESP global frequency and its presence in a patient with a rare or unrelated disease phenotype. NOT Sanger confirmed. -

not provided

Benign:2

Jun 26, 2018

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Breakthrough Genomics, Breakthrough Genomics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Meckel syndrome, type 6

Benign:1

Jul 14, 2021

Genome-Nilou Lab

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Joubert syndrome 9

Benign:1

Jul 14, 2021

Genome-Nilou Lab

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.92

CADD

Benign

0.62

DANN

Benign

0.73

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over