2-218580673-G-A

Position:

• chr2-218580673-G-A

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM1 PM2 PM5 PP3

The NM_005444.3(CNOT9):​c.137G>A​(p.Arg46Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R46G) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CNOT9 NM_005444.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.98

Genes affected

CNOT9 (HGNC:10445): (CCR4-NOT transcription complex subunit 9) This gene encodes a member of the highly conserved RCD1 protein family. The encoded protein is a transcriptional cofactor and a core protein of the CCR4-NOT complex. It may be involved in signal transduction as well as retinoic acid-regulated cell differentiation and development. Alternatively spliced transcript variants have been described for this gene. [provided by RefSeq, Oct 2012]

ACMG classification

Verdict is Likely_pathogenic. Variant got 7 ACMG points.

• PM1: In a chain CCR4-NOT transcription complex subunit 9 (size 298) in uniprot entity CNOT9_HUMAN there are 7 pathogenic changes around while only 1 benign (88%) in NM_005444.3
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr2-218580672-C-G is described in ClinVar as [Likely_pathogenic]. Clinvar id is 1707499.Status of the report is criteria_provided_single_submitter, 1 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.84

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CNOT9	NM_005444.3	c.137G>A	p.Arg46Gln	missense_variant	2/8	ENST00000273064.11
CNOT9	NM_001271634.2	c.137G>A	p.Arg46Gln	missense_variant	2/9
CNOT9	NM_001271635.2	c.137G>A	p.Arg46Gln	missense_variant	2/8
CNOT9	NR_073390.2	n.253G>A		non_coding_transcript_exon_variant	2/7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CNOT9	ENST00000273064.11	c.137G>A	p.Arg46Gln	missense_variant	2/8	1	NM_005444.3	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Nov 28, 2022

Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge; Variants in candidate genes are classified as variants of uncertain significance in accordance with ACMG guidelines (Richards et al., 2015) -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.33	D
BayesDel_noAF	Pathogenic	0.24
CADD	Pathogenic	32
DANN	Pathogenic	1.0
DEOGEN2	Benign	0.39	.;T;T;.
Eigen	Pathogenic	1.1
Eigen_PC	Pathogenic	1.1
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Uncertain	0.94	D;.;D;D
M_CAP	Uncertain	0.097	D
MetaRNN	Pathogenic	0.84	D;D;D;D
MetaSVM	Uncertain	0.38	D
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Pathogenic	0.90	D
PROVEAN	Uncertain	-3.9	.;D;D;D
REVEL	Uncertain	0.60
Sift	Uncertain	0.0020	.;D;D;D
Sift4G	Uncertain	0.0020	D;D;D;D
Polyphen		1.0	.;D;D;.
Vest4		0.75
MutPred		0.75		Gain of relative solvent accessibility (P = 0.0479);Gain of relative solvent accessibility (P = 0.0479);Gain of relative solvent accessibility (P = 0.0479);Gain of relative solvent accessibility (P = 0.0479);
MVP		0.79
MPC		1.5
ClinPred		1.0	D
GERP RS		5.8
Varity_R		0.89
gMVP		0.91

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr2-219445396;