chr12-70330448-G-A

Position:

• chr12-70330448-G-A

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP4 BS2

The NM_014515.7(CNOT2):​c.548G>A​(p.Arg183Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000616 in 1,460,068 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: not found (cov: 32)
  • Exomes 𝑓: 0.0000062 (0 hom.)
• Consequence: CNOT2 NM_014515.7 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 8.11

Genes affected

CNOT2 (HGNC:7878): (CCR4-NOT transcription complex subunit 2) This gene encodes a subunit of the multi-component CCR4-NOT complex. The CCR4-NOT complex regulates mRNA synthesis and degradation and is also thought to be involved in mRNA splicing, transport and localization. The encoded protein interacts with histone deacetylases and functions as a repressor of polymerase II transcription. Alternatively spliced transcript variants have been observed for this gene. [provided by RefSeq, Dec 2010]

ACMG classification

Verdict is Likely_benign. Variant got -5 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.29538912).
• BS2: High AC in GnomAdExome4 at 9 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CNOT2	NM_014515.7	c.548G>A	p.Arg183Gln	missense_variant	6/16	ENST00000229195.8	NP_055330.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CNOT2	ENST00000229195.8	c.548G>A	p.Arg183Gln	missense_variant	6/16	1	NM_014515.7	ENSP00000229195.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000616 AC: 9 AN: 1460068 Hom.: 0 Cov.: 30 AF XY: 0.00000688 AC XY: 5 AN XY: 726376

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000810

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000756

ESP6500AA AF: 0.00 AC: 0

ESP6500EA AF: 0.000116 AC: 1

ExAC AF: 0.00000824 AC: 1

EpiCase AF: 0.0000547

EpiControl AF: 0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 02, 2023

The c.548G>A (p.R183Q) alteration is located in exon 6 (coding exon 5) of the CNOT2 gene. This alteration results from a G to A substitution at nucleotide position 548, causing the arginine (R) at amino acid position 183 to be replaced by a glutamine (Q). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.16
BayesDel_addAF	Uncertain	0.064	T
BayesDel_noAF	Benign	-0.15
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Benign	0.053	.;T;T;.;T;T;.;T
Eigen	Uncertain	0.30
Eigen_PC	Uncertain	0.43
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.92	D;D;.;D;D;.;D;D
M_CAP	Benign	0.016	T
MetaRNN	Benign	0.30	T;T;T;T;T;T;T;T
MetaSVM	Benign	-0.72	T
MutationAssessor	Benign	1.1	.;L;L;.;.;L;.;.
PrimateAI	Pathogenic	0.79	T
PROVEAN	Benign	-0.11	N;N;N;N;N;N;N;N
REVEL	Benign	0.22
Sift	Benign	0.23	T;T;T;T;T;T;D;D
Sift4G	Benign	0.20	T;T;T;T;T;T;D;T
Polyphen		0.89	.;P;P;.;.;P;.;.
Vest4		0.39, 0.38
MVP		0.72
MPC		1.1
ClinPred		0.47	T
GERP RS		5.3
Varity_R		0.15
gMVP		0.64

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.090		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

Other links and lift over

dbSNP: rs149494869; hg19: chr12-70724228;