rs778082588

Positions:

chr4-15574244-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The NM_001378615.1(CC2D2A):c.3689G>A(p.Arg1230Gln) variant causes a missense change. The variant allele was found at a frequency of 0.000018 in 1,551,416 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 Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000019 ( 0 hom. )

Consequence

CC2D2A
NM_001378615.1 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.87

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 Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.3172688).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
CC2D2A	NM_001378615.1 linkuse as main transcript	c.3689G>A	p.Arg1230Gln	missense_variant	29/37	ENST00000424120.6	NP_001365544.1
CC2D2A	NM_001080522.2 linkuse as main transcript	c.3689G>A	p.Arg1230Gln	missense_variant	30/38		NP_001073991.2
CC2D2A	NM_001378617.1 linkuse as main transcript	c.3542G>A	p.Arg1181Gln	missense_variant	27/35		NP_001365546.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CC2D2A	ENST00000424120.6 linkuse as main transcript	c.3689G>A	p.Arg1230Gln	missense_variant	29/37	5	NM_001378615.1	ENSP00000403465	P1	Q9P2K1-4

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152152

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000455

AC:

AN:

153832

Hom.:

AF XY:

0.0000735

AC XY:

AN XY:

81616

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000176

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000504

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000193

AC:

AN:

1399264

Hom.:

Cov.:

AF XY:

0.0000246

AC XY:

AN XY:

690142

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000840

Gnomad4 SAS exome

AF:

0.000151

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000102

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152152

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74328

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ExAC

AF:

0.000137

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

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

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Sep 01, 2021

This sequence change replaces arginine with glutamine at codon 1230 of the CC2D2A protein (p.Arg1230Gln). The arginine residue is moderately conserved and there is a small physicochemical difference between arginine and glutamine. This variant is present in population databases (rs778082588, ExAC 0.03%). This variant has not been reported in the literature in individuals affected with CC2D2A-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The glutamine 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.081

BayesDel_addAF

Benign

-0.14

BayesDel_noAF

Benign

-0.18

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.062

T;T

Eigen

Uncertain

0.21

Eigen_PC

Benign

0.15

FATHMM_MKL

Uncertain

0.97

LIST_S2

Uncertain

0.88

D;.

M_CAP

Uncertain

0.16

MetaRNN

Benign

0.32

T;T

MetaSVM

Uncertain

0.43

MutationAssessor

Benign

0.93

L;L

MutationTaster

Benign

1.0

D;D;D;D

PrimateAI

Benign

0.28

PROVEAN

Benign

-1.3

N;N

REVEL

Uncertain

0.49

Sift

Benign

0.28

T;T

Sift4G

Benign

0.26

T;T

Polyphen

1.0

D;D

Vest4

0.13

MutPred

0.39

Gain of glycosylation at S1231 (P = 0.0148);Gain of glycosylation at S1231 (P = 0.0148);

MVP

0.81

MPC

0.048

ClinPred

0.38

GERP RS

3.3

Varity_R

0.064

gMVP

0.43

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