X-101346542-G-A

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_ModerateBP6_Very_StrongBS2

The NM_004085.4(TIMM8A):c.251C>T(p.Thr84Ile) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000364 in 1,209,829 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 16 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. T84T) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000036 ( 0 hom., 2 hem., cov: 23)

Exomes 𝑓: 0.000036 ( 0 hom. 14 hem. )

Consequence

TIMM8A
NM_004085.4 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:2

Conservation

PhyloP100: 7.76

Variant links:

Genes affected

TIMM8A (HGNC:11817): (translocase of inner mitochondrial membrane 8A) This translocase is involved in the import and insertion of hydrophobic membrane proteins from the cytoplasm into the mitochondrial inner membrane. The gene is mutated in Mohr-Tranebjaerg syndrome/Deafness Dystonia Syndrome (MTS/DDS) and it is postulated that MTS/DDS is a mitochondrial disease caused by a defective mitochondrial protein import system. Defects in this gene also cause Jensen syndrome; an X-linked disease with opticoacoustic nerve atrophy and muscle weakness. This protein, along with TIMM13, forms a 70 kDa heterohexamer. Alternative splicing results in multiple transcript variants encoding distinct isoforms.[provided by RefSeq, Mar 2009]

TIMM8A links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -14 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.2619148).

BP6

Variant X-101346542-G-A is Benign according to our data. Variant chrX-101346542-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 1220355.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS2

High Hemizygotes in GnomAd at 2 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TIMM8A	NM_004085.4 linkuse as main transcript	c.251C>T	p.Thr84Ile	missense_variant	2/2	ENST00000372902.4
TIMM8A	NM_001145951.2 linkuse as main transcript	c.*1845C>T		3_prime_UTR_variant	2/2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris
TIMM8A	ENST00000372902.4 linkuse as main transcript	c.251C>T	p.Thr84Ile	missense_variant	2/2	1	NM_004085.4	P1
TIMM8A	ENST00000644112.2 linkuse as main transcript	c.*1845C>T		3_prime_UTR_variant	2/2
TIMM8A	ENST00000647480.1 linkuse as main transcript	n.768C>T		non_coding_transcript_exon_variant	2/2
TIMM8A	ENST00000645279.1 linkuse as main transcript	c.*445C>T		3_prime_UTR_variant, NMD_transcript_variant	3/3

Frequencies

GnomAD3 genomes

AF:

0.0000357

AC:

AN:

111928

Hom.:

Cov.:

AF XY:

0.0000586

AC XY:

AN XY:

34102

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.000377

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000564

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000545

AC:

AN:

183503

Hom.:

AF XY:

0.0000589

AC XY:

AN XY:

67935

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

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:

0.000110

Gnomad OTH exome

AF:

0.000221

GnomAD4 exome

AF:

0.0000364

AC:

AN:

1097901

Hom.:

Cov.:

AF XY:

0.0000385

AC XY:

AN XY:

363385

show subpopulations

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:

0.0000463

Gnomad4 OTH exome

AF:

0.0000217

GnomAD4 genome

AF:

0.0000357

AC:

AN:

111928

Hom.:

Cov.:

AF XY:

0.0000586

AC XY:

AN XY:

34102

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.000377

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000564

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000381

Hom.:

Bravo

AF:

0.0000264

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000149

AC:

ExAC

AF:

0.0000494

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.00

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Apr 29, 2020	- -
Benign, criteria provided, single submitter	clinical testing	Invitae	Oct 22, 2023	- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.40

BayesDel_addAF

Benign

-0.013

BayesDel_noAF

Uncertain

-0.010

Cadd

Uncertain

Dann

Uncertain

0.99

DEOGEN2

Benign

0.097

T;T

FATHMM_MKL

Pathogenic

0.99

M_CAP

Pathogenic

0.49

MetaRNN

Benign

0.26

T;T

MetaSVM

Benign

-0.89

MutationTaster

Benign

1.0

PrimateAI

Pathogenic

0.82

Polyphen

0.051

B;B

Vest4

0.49

MVP

0.90

MPC

1.2

ClinPred

0.20

GERP RS

5.3

Varity_R

0.49

gMVP

0.94

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

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