Genetic Variant NM_017721.5:c.1234A>T (chr19-13919829-A-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_017721.5(CC2D1A):c.1234A>T(p.Ile412Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000207 in 1,451,630 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. I412V) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

CC2D1A
NM_017721.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 3.18

Publications

5 publications found

Variant links:

Genes affected

CC2D1A (HGNC:30237): (coiled-coil and C2 domain containing 1A) This gene encodes a transcriptional repressor that binds to a conserved 14-bp 5'-repressor element and regulates expression of the 5-hydroxytryptamine (serotonin) receptor 1A gene in neuronal cells. The DNA binding and transcriptional repressor activities of the protein are inhibited by calcium. A mutation in this gene results in a nonsyndromic form of cognitive disability (MRT3). [provided by RefSeq, Jul 2017]

CC2D1A Gene-Disease associations (from GenCC):

complex neurodevelopmental disorder
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
intellectual disability, autosomal recessive 3
Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P
autosomal recessive non-syndromic intellectual disability
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

CC2D1A links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CC2D1A	NM_017721.5 link	c.1234A>T	p.Ile412Phe	missense_variant	Exon 12 of 29	ENST00000318003.11	NP_060191.3	Q6P1N0-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CC2D1A	ENST00000318003.11 link	c.1234A>T	p.Ile412Phe	missense_variant	Exon 12 of 29	1	NM_017721.5	ENSP00000313601.6		Q6P1N0-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000403

AC:

AN:

248050

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000558

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000207

AC:

AN:

1451630

Hom.:

Cov.:

AF XY:

0.00000278

AC XY:

AN XY:

720568

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33166

American (AMR)

AF:

0.00

AC:

AN:

44230

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26002

East Asian (EAS)

AF:

0.00

AC:

AN:

39408

South Asian (SAS)

AF:

0.0000349

AC:

AN:

85926

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53316

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4454

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1105376

Other (OTH)

AF:

0.00

AC:

AN:

59752

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.575

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

Cov.:

ExAC

AF:

0.00000828

AC:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.36

BayesDel_addAF

Benign

-0.17

BayesDel_noAF

Benign

-0.31

CADD

Pathogenic

(source)

DANN

Uncertain

0.98

DEOGEN2

Benign

0.38

T;.

Eigen

Uncertain

0.26

Eigen_PC

Uncertain

0.29

FATHMM_MKL

Uncertain

0.95

LIST_S2

Uncertain

0.97

D;D

M_CAP

Benign

0.027

MetaRNN

Benign

0.30

T;T

MetaSVM

Benign

-0.97

MutationAssessor

Pathogenic

3.0

M;M

PhyloP100

3.2

PrimateAI

Uncertain

0.55

PROVEAN

Uncertain

-3.0

D;.

REVEL

Benign

0.12

Sift

Uncertain

0.0070

D;.

Sift4G

Uncertain

0.034

D;D

Polyphen

0.82

P;P

Vest4

0.26

MutPred

0.40

Gain of disorder (P = 0.1413);Gain of disorder (P = 0.1413);

MVP

0.52

MPC

0.79

ClinPred

0.92

GERP RS

4.9

PromoterAI

0.0012

Neutral

(source)

Varity_R

0.20

gMVP

0.28

Mutation Taster

=81/19

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.34

Details are displayed if max score is > 0.2

DS_AG_spliceai

0.34

Position offset: 6

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

ClinVar

Computational scores

Splicing

Publications

Other links and lift over