Genetic Variant TOMM20L:p.Lys66Glu (chr14-58402695-A-G) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_207377.3(TOMM20L):c.196A>G(p.Lys66Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000201 in 1,613,512 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00019 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00020 ( 1 hom. )

Consequence

TOMM20L
NM_207377.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.619

Variant links:

Genes affected

TOMM20L (HGNC:33752): (translocase of outer mitochondrial membrane 20 like) Predicted to enable mitochondrion targeting sequence binding activity. Predicted to contribute to protein transmembrane transporter activity. Predicted to be involved in protein import into mitochondrial matrix and tRNA import into mitochondrion. Predicted to be integral component of membrane. Predicted to be part of mitochondrial outer membrane translocase complex. Predicted to be integral component of mitochondrial outer membrane. [provided by Alliance of Genome Resources, Apr 2022]

TOMM20L links:

ENSG00000258378 (HGNC:):

ENSG00000258378 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.049021184).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TOMM20L	NM_207377.3 link	c.196A>G	p.Lys66Glu	missense_variant	Exon 3 of 5	ENST00000360945.7	NP_997260.1	Q6UXN7
TOMM20L	XM_011536742.4 link	c.220A>G	p.Lys74Glu	missense_variant	Exon 3 of 5		XP_011535044.1
TOMM20L	XM_011536743.3 link	c.220A>G	p.Lys74Glu	missense_variant	Exon 3 of 5		XP_011535045.1
TOMM20L	XM_011536744.4 link	c.137-4631A>G		intron_variant	Intron 1 of 2		XP_011535046.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
TOMM20L	ENST00000360945.7 link	c.196A>G	p.Lys66Glu	missense_variant	Exon 3 of 5	1	NM_207377.3	ENSP00000354204.2	Q6UXN7
TOMM20L	ENST00000557754.1 link	n.181-4631A>G		intron_variant	Intron 2 of 3	1		ENSP00000451683.1	G3V4A4
ENSG00000258378	ENST00000556734.1 link	n.374+3765A>G		intron_variant	Intron 1 of 1	3

Frequencies

GnomAD3 genomes

AF:

0.000190

AC:

AN:

152244

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

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:

0.000353

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000231

AC:

AN:

251264

Hom.:

AF XY:

0.000199

AC XY:

AN XY:

135844

show subpopulations

Gnomad AFR exome

AF:

0.000123

Gnomad AMR exome

AF:

0.000434

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:

0.000343

Gnomad OTH exome

AF:

0.000327

GnomAD4 exome

AF:

0.000202

AC:

295

AN:

1461268

Hom.:

Cov.:

AF XY:

0.000197

AC XY:

143

AN XY:

727006

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000514

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:

0.000238

Gnomad4 OTH exome

AF:

0.000116

GnomAD4 genome

AF:

0.000190

AC:

AN:

152244

Hom.:

Cov.:

AF XY:

0.000148

AC XY:

AN XY:

74374

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.000262

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000353

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000323

Hom.:

Bravo

AF:

0.000200

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.000173

AC:

EpiCase

AF:

0.0000545

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

Mar 24, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.196A>G (p.K66E) alteration is located in exon 3 (coding exon 3) of the TOMM20L gene. This alteration results from a A to G substitution at nucleotide position 196, causing the lysine (K) at amino acid position 66 to be replaced by a glutamic acid (E). 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

0.086

BayesDel_addAF

Benign

-0.44

BayesDel_noAF

Benign

-0.55

CADD

Benign

DANN

Benign

0.97

DEOGEN2

Benign

0.016

Eigen

Benign

-0.49

Eigen_PC

Benign

-0.52

FATHMM_MKL

Benign

0.45

LIST_S2

Benign

0.46

M_CAP

Benign

0.0030

MetaRNN

Benign

0.049

MetaSVM

Benign

-0.95

MutationAssessor

Benign

1.9

PrimateAI

Benign

0.43

PROVEAN

Benign

0.80

REVEL

Benign

0.068

Sift

Benign

0.045

Sift4G

Benign

0.23

Polyphen

0.13

Vest4

0.20

MVP

0.014

MPC

0.88

ClinPred

0.0096

GERP RS

0.80

Varity_R

0.15

gMVP

0.061

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.070

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

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