X-48897739-T-A

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP4BS2

The NM_001395498.1(TIMM17B):c.11A>T(p.Tyr4Phe) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000348 in 1,208,394 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 13 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00018 ( 0 hom., 6 hem., cov: 24)

Exomes 𝑓: 0.000020 ( 0 hom. 7 hem. )

Consequence

TIMM17B
NM_001395498.1 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.40

Variant links:

Genes affected

TIMM17B (HGNC:17310): (translocase of inner mitochondrial membrane 17B) This gene encodes a multipass transmembrane protein that forms an integral component of the mitochondrial translocase TIM23 complex. This complex facilitates the transport of mitochondrial proteins from the cytosol across the mitochondrial inner membrane and into the mitochondrion. There is a pseudogene for this gene on chromosome 12. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Aug 2013]

TIMM17B links:

PQBP1 (HGNC:9330): (polyglutamine binding protein 1) This gene encodes a nuclear polyglutamine-binding protein that is involved with transcription activation. The encoded protein contains a WW domain. Mutations in this gene have been found in patients with Renpenning syndrome 1 and other syndromes with X-linked cognitive disability. Multiple alternatively spliced transcript variants that encode different protein isoforms have been described for this gene.[provided by RefSeq, Nov 2009]

PQBP1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.28078967).

BS2

High Hemizygotes in GnomAd4 at 6 gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TIMM17B	NM_001395498.1 link	c.11A>T	p.Tyr4Phe	missense_variant	Exon 1 of 6	ENST00000696123.1	NP_001382427.1
PQBP1	NM_001032382.2 link	c.-362T>A		upstream_gene_variant		ENST00000447146.7	NP_001027554.1	O60828-1A0A0S2Z4V5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TIMM17B	ENST00000696123.1 link	c.11A>T	p.Tyr4Phe	missense_variant	Exon 1 of 6		NM_001395498.1	ENSP00000512416.1		O60830-1
PQBP1	ENST00000447146.7 link	c.-362T>A		upstream_gene_variant		1	NM_001032382.2	ENSP00000391759.2		O60828-1

Frequencies

GnomAD3 genomes

AF:

0.000178

AC:

AN:

112645

Hom.:

Cov.:

AF XY:

0.000172

AC XY:

AN XY:

34783

show subpopulations

Gnomad AFR

AF:

0.0000645

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00150

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:

0.00

Gnomad OTH

AF:

0.00132

GnomAD3 exomes

AF:

0.0000225

AC:

AN:

178156

Hom.:

AF XY:

0.00

AC XY:

AN XY:

64224

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000735

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:

0.00

Gnomad OTH exome

AF:

0.000454

GnomAD4 exome

AF:

0.0000201

AC:

AN:

1095695

Hom.:

Cov.:

AF XY:

0.0000194

AC XY:

AN XY:

361353

show subpopulations

Gnomad4 AFR exome

AF:

0.0000379

Gnomad4 AMR exome

AF:

0.000484

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:

0.00

Gnomad4 OTH exome

AF:

0.0000869

GnomAD4 genome

AF:

0.000177

AC:

AN:

112699

Hom.:

Cov.:

AF XY:

0.000172

AC XY:

AN XY:

34847

show subpopulations

Gnomad4 AFR

AF:

0.0000643

Gnomad4 AMR

AF:

0.00149

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00131

Bravo

AF:

0.000540

ExAC

AF:

0.00000825

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

May 10, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.11A>T (p.Y4F) alteration is located in exon 2 (coding exon 1) of the TIMM17B gene. This alteration results from a A to T substitution at nucleotide position 11, causing the tyrosine (Y) at amino acid position 4 to be replaced by a phenylalanine (F). 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

0.30

BayesDel_addAF

Benign

-0.25

BayesDel_noAF

Benign

-0.40

CADD

Uncertain

DANN

Benign

0.97

DEOGEN2

Benign

0.23

.;T;.

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.92

.;D;D

M_CAP

Pathogenic

0.39

MetaRNN

Benign

0.28

T;T;T

MetaSVM

Benign

-0.82

MutationAssessor

Benign

1.9

L;L;L

PrimateAI

Pathogenic

0.82

PROVEAN

Uncertain

-3.0

.;D;D

REVEL

Benign

0.25

Sift

Benign

0.16

.;T;T

Sift4G

Benign

0.26

T;T;T

Polyphen

0.96

.;P;.

Vest4

0.63

MutPred

0.42

Loss of phosphorylation at Y4 (P = 0.0516);Loss of phosphorylation at Y4 (P = 0.0516);Loss of phosphorylation at Y4 (P = 0.0516);

MVP

0.27

MPC

0.38

ClinPred

0.17

GERP RS

5.6

Varity_R

0.43

gMVP

0.81

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