rs61734948

Positions:

chr4-15570411-G-A

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_001378615.1(CC2D2A):c.3509G>A(p.Arg1170Lys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00116 in 1,599,478 control chromosomes in the GnomAD database, including 25 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0061 ( 12 hom., cov: 32)

Exomes 𝑓: 0.00064 ( 13 hom. )

Consequence

CC2D2A
NM_001378615.1 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:8

Conservation

PhyloP100: 7.23

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:

LOC124900671 (HGNC:):

LOC124900671 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 (MetaRNN=0.009373516).

BP6

Variant 4-15570411-G-A is Benign according to our data. Variant chr4-15570411-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 126240.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr4-15570411-G-A is described in Lovd as [Benign]. Variant chr4-15570411-G-A is described in Lovd as [Likely_benign].

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00609 (927/152302) while in subpopulation AFR AF= 0.0213 (886/41562). AF 95% confidence interval is 0.0202. There are 12 homozygotes in gnomad4. There are 440 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 12 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
CC2D2A	NM_001378615.1 linkuse as main transcript	c.3509G>A	p.Arg1170Lys	missense_variant	28/37	ENST00000424120.6
LOC124900671	XR_007058061.1 linkuse as main transcript	n.130+320C>T		intron_variant, non_coding_transcript_variant
CC2D2A	NM_001080522.2 linkuse as main transcript	c.3509G>A	p.Arg1170Lys	missense_variant	29/38
CC2D2A	NM_001378617.1 linkuse as main transcript	c.3362G>A	p.Arg1121Lys	missense_variant	26/35

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CC2D2A	ENST00000424120.6 linkuse as main transcript	c.3509G>A	p.Arg1170Lys	missense_variant	28/37	5	NM_001378615.1	P1	Q9P2K1-4

Frequencies

GnomAD3 genomes

AF:

0.00609

AC:

927

AN:

152184

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0214

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00190

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00431

GnomAD3 exomes

AF:

0.00155

AC:

372

AN:

240108

Hom.:

AF XY:

0.00131

AC XY:

170

AN XY:

129742

show subpopulations

Gnomad AFR exome

AF:

0.0232

Gnomad AMR exome

AF:

0.000777

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000104

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000184

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000639

AC:

925

AN:

1447176

Hom.:

Cov.:

AF XY:

0.000544

AC XY:

391

AN XY:

718302

show subpopulations

Gnomad4 AFR exome

AF:

0.0236

Gnomad4 AMR exome

AF:

0.000842

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000131

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000118

Gnomad4 OTH exome

AF:

0.00120

GnomAD4 genome

AF:

0.00609

AC:

927

AN:

152302

Hom.:

Cov.:

AF XY:

0.00591

AC XY:

440

AN XY:

74470

show subpopulations

Gnomad4 AFR

AF:

0.0213

Gnomad4 AMR

AF:

0.00189

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00426

Alfa

AF:

0.00112

Hom.:

Bravo

AF:

0.00674

ESP6500AA

AF:

0.0162

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.00184

AC:

222

Asia WGS

AF:

0.00115

AC:

AN:

3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:8

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:3

Likely benign, no assertion criteria provided	clinical testing	Genetic Services Laboratory, University of Chicago	-	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. -
Benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	-	- -
Benign, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -

not provided

Benign:2

Benign, criteria provided, single submitter	clinical testing	GeneDx	Mar 03, 2015	- -
Likely benign, no assertion criteria provided	clinical testing	Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)	-	- -

Meckel-Gruber syndrome;C0431399:Familial aplasia of the vermis

Benign:1

Benign, criteria provided, single submitter

clinical testing

Invitae

Jan 31, 2024

- -

Meckel syndrome, type 6

Benign:1

Likely benign, 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 and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

Joubert syndrome 9

Benign:1

Benign, 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 and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Benign

-0.23

BayesDel_noAF

Uncertain

-0.080

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Benign

0.19

T;T

Eigen

Pathogenic

0.71

Eigen_PC

Pathogenic

0.73

FATHMM_MKL

Uncertain

0.95

LIST_S2

Benign

0.75

T;.

MetaRNN

Benign

0.0094

T;T

MetaSVM

Uncertain

-0.12

MutationAssessor

Uncertain

2.8

M;M

MutationTaster

Benign

1.0

D;D;D;D

PrimateAI

Uncertain

0.57

PROVEAN

Benign

-2.0

N;N

REVEL

Uncertain

0.53

Sift

Uncertain

0.018

D;D

Sift4G

Benign

0.13

T;T

Polyphen

1.0

D;D

Vest4

0.76

MVP

0.91

MPC

0.27

ClinPred

0.035

GERP RS

5.7

Varity_R

0.44

gMVP

0.46

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