Variant 12-121771532-C-G details in Genebe, Genetics Data Aggregator

Variant summary

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

The NM_001080825.2(TMEM120B):c.662C>G(p.Ala221Gly) variant causes a missense change. The variant allele was found at a frequency of 0.0000341 in 1,613,934 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 0.000072 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000030 ( 0 hom. )

Consequence

TMEM120B
NM_001080825.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 6.15

Variant links:

Genes affected

TMEM120B (HGNC:32008): (transmembrane protein 120B) Predicted to be involved in fat cell differentiation and protein heterooligomerization. Predicted to be integral component of membrane. Predicted to be active in nuclear inner membrane. [provided by Alliance of Genome Resources, Apr 2022]

TMEM120B links:

Genome browser will be placed here

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	Protein	UniProt
TMEM120B	NM_001080825.2 linkuse as main transcript	c.662C>G	p.Ala221Gly	missense_variant	8/12	ENST00000449592.7	NP_001074294.2	A0PK00

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
TMEM120B	ENST00000449592.7 linkuse as main transcript	c.662C>G	p.Ala221Gly	missense_variant	8/12	1	NM_001080825.2	ENSP00000404991.2	A0PK00
TMEM120B	ENST00000541467.1 linkuse as main transcript	c.599C>G	p.Ala200Gly	missense_variant	7/10	5		ENSP00000442105.1	H0YG77
TMEM120B	ENST00000540377.1 linkuse as main transcript	c.-211-1889C>G		intron_variant		3		ENSP00000446159.1	F5H465
TMEM120B	ENST00000342607.10 linkuse as main transcript	n.662C>G		non_coding_transcript_exon_variant	8/13	2		ENSP00000345152.6	A0PK00

Frequencies

GnomAD3 genomes

AF:

0.0000723

AC:

AN:

152120

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000328

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000588

Gnomad OTH

AF:

0.000957

GnomAD3 exomes

AF:

0.0000200

AC:

AN:

249506

Hom.:

AF XY:

0.0000222

AC XY:

AN XY:

135378

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000869

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000177

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000301

AC:

AN:

1461814

Hom.:

Cov.:

AF XY:

0.0000275

AC XY:

AN XY:

727204

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000671

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000342

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000723

AC:

AN:

152120

Hom.:

Cov.:

AF XY:

0.0000538

AC XY:

AN XY:

74322

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000328

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000588

Gnomad4 OTH

AF:

0.000957

Bravo

AF:

0.0000982

ExAC

AF:

0.0000165

AC:

EpiCase

AF:

0.000218

EpiControl

AF:

0.0000593

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

Aug 28, 2024

The c.662C>G (p.A221G) alteration is located in exon 8 (coding exon 8) of the TMEM120B gene. This alteration results from a C to G substitution at nucleotide position 662, causing the alanine (A) at amino acid position 221 to be replaced by a glycine (G). 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

0.13

BayesDel_addAF

Benign

-0.23

BayesDel_noAF

Benign

-0.34

CADD

Uncertain

DANN

Benign

0.66

DEOGEN2

Benign

0.021

T;.

Eigen

Benign

-0.35

Eigen_PC

Benign

-0.26

FATHMM_MKL

Uncertain

0.95

LIST_S2

Benign

0.75

T;T

M_CAP

Benign

0.019

MetaRNN

Benign

0.24

T;T

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.7

M;.

PrimateAI

Uncertain

0.59

PROVEAN

Benign

-1.8

N;N

REVEL

Benign

0.21

Sift

Benign

0.32

T;T

Sift4G

Benign

0.33

T;T

Polyphen

0.0060

B;.

Vest4

0.52

MutPred

0.36

Gain of catalytic residue at Q226 (P = 2e-04);.;

MVP

0.13

MPC

0.50

ClinPred

0.13

GERP RS

4.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

Varity_R

0.16

gMVP

0.42

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.26

Details are displayed if max score is > 0.2

DS_AG_spliceai

0.26

Position offset: -44

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