Variant 3-32357422-G-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_178868.5(CMTM8):c.197G>A(p.Arg66Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000158 in 1,613,876 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 0.00020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00015 ( 0 hom. )

Consequence

CMTM8
NM_178868.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.75

Variant links:

Genes affected

CMTM8 (HGNC:19179): (CKLF like MARVEL transmembrane domain containing 8) This gene belongs to the chemokine-like factor gene superfamily, a novel family that is similar to the chemokine and the transmembrane 4 superfamilies. This gene is one of several chemokine-like factor genes located in a cluster on chromosome 3. This gene acts as a tumor suppressor, and plays a role in regulating the migration of tumor cells. The encoded protein is thought to function as a a negative regulator of epidermal growth factor-induced signaling. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Feb 2016]

CMTM8 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CMTM8	NM_178868.5 linkuse as main transcript	c.197G>A	p.Arg66Gln	missense_variant	2/4	ENST00000307526.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CMTM8	ENST00000307526.4 linkuse as main transcript	c.197G>A	p.Arg66Gln	missense_variant	2/4	1	NM_178868.5	P1	Q8IZV2-1
CMTM8	ENST00000458535.6 linkuse as main transcript	c.148-10450G>A		intron_variant		1			Q8IZV2-2

Frequencies

GnomAD3 genomes

AF:

0.000204

AC:

AN:

151902

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000968

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000853

Gnomad ASJ

AF:

0.000576

Gnomad EAS

AF:

0.000386

Gnomad SAS

AF:

0.000209

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.00287

GnomAD3 exomes

AF:

0.000179

AC:

AN:

251470

Hom.:

AF XY:

0.000184

AC XY:

AN XY:

135904

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000491

Gnomad ASJ exome

AF:

0.000397

Gnomad EAS exome

AF:

0.000217

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000149

Gnomad OTH exome

AF:

0.000489

GnomAD4 exome

AF:

0.000153

AC:

224

AN:

1461856

Hom.:

Cov.:

AF XY:

0.000161

AC XY:

117

AN XY:

727230

show subpopulations

Gnomad4 AFR exome

AF:

0.0000597

Gnomad4 AMR exome

AF:

0.000537

Gnomad4 ASJ exome

AF:

0.000191

Gnomad4 EAS exome

AF:

0.000403

Gnomad4 SAS exome

AF:

0.0000580

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000115

Gnomad4 OTH exome

AF:

0.000563

GnomAD4 genome

AF:

0.000204

AC:

AN:

152020

Hom.:

Cov.:

AF XY:

0.000296

AC XY:

AN XY:

74304

show subpopulations

Gnomad4 AFR

AF:

0.0000965

Gnomad4 AMR

AF:

0.000852

Gnomad4 ASJ

AF:

0.000576

Gnomad4 EAS

AF:

0.000387

Gnomad4 SAS

AF:

0.000209

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.00284

Alfa

AF:

0.000131

Hom.:

Bravo

AF:

0.000178

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000123

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.000164

EpiControl

AF:

0.000237

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 23, 2024

The c.197G>A (p.R66Q) alteration is located in exon 2 (coding exon 2) of the CMTM8 gene. This alteration results from a G to A substitution at nucleotide position 197, causing the arginine (R) at amino acid position 66 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

0.12

BayesDel_addAF

Benign

-0.36

BayesDel_noAF

Benign

-0.41

Cadd

Uncertain

Dann

Uncertain

1.0

DEOGEN2

Benign

0.0084

Eigen

Uncertain

0.23

Eigen_PC

Uncertain

0.27

FATHMM_MKL

Benign

0.71

LIST_S2

Uncertain

0.93

M_CAP

Benign

0.017

MetaRNN

Benign

0.12

MetaSVM

Benign

-0.99

MutationAssessor

Benign

1.2

MutationTaster

Benign

0.63

D;D

PrimateAI

Benign

0.44

PROVEAN

Benign

-1.0

REVEL

Benign

0.14

Sift

Benign

0.30

Sift4G

Benign

0.50

Polyphen

0.98

Vest4

0.49

MVP

0.16

MPC

0.46

ClinPred

0.059

GERP RS

5.2

Varity_R

0.11

gMVP

0.38

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.21

Details are displayed if max score is > 0.2

DS_AL_spliceai

0.21

Position offset: -49

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