chrX-48894171-C-T

Position:

chrX-48894171-C-T

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_001395498.1(TIMM17B):c.245G>A(p.Arg82Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000199 in 1,205,505 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 8 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 0.000072 ( 0 hom., 1 hem., cov: 23)

Exomes 𝑓: 0.000015 ( 0 hom. 7 hem. )

Consequence

TIMM17B
NM_001395498.1 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.908

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 -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.10329521).

BS2

High Hemizygotes in GnomAdExome4 at 7 gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
TIMM17B	NM_001395498.1 linkuse as main transcript	c.245G>A	p.Arg82Gln	missense_variant	4/6	ENST00000696123.1	NP_001382427.1
TIMM17B	NM_001167947.2 linkuse as main transcript	c.395G>A	p.Arg132Gln	missense_variant	6/8		NP_001161419.1
TIMM17B	NM_001395497.1 linkuse as main transcript	c.395G>A	p.Arg132Gln	missense_variant	5/7		NP_001382426.1
TIMM17B	NM_005834.5 linkuse as main transcript	c.245G>A	p.Arg82Gln	missense_variant	5/7		NP_005825.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TIMM17B	ENST00000696123.1 linkuse as main transcript	c.245G>A	p.Arg82Gln	missense_variant	4/6		NM_001395498.1	ENSP00000512416	P1	O60830-1

Frequencies

GnomAD3 genomes

AF:

0.0000716

AC:

AN:

111690

Hom.:

Cov.:

AF XY:

0.0000295

AC XY:

AN XY:

33842

show subpopulations

Gnomad AFR

AF:

0.0000976

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000942

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000290

AC:

AN:

172153

Hom.:

AF XY:

0.0000511

AC XY:

AN XY:

58717

show subpopulations

Gnomad AFR exome

AF:

0.0000829

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000746

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000398

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000146

AC:

AN:

1093815

Hom.:

Cov.:

AF XY:

0.0000195

AC XY:

AN XY:

359869

show subpopulations

Gnomad4 AFR exome

AF:

0.000114

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000333

Gnomad4 SAS exome

AF:

0.0000187

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000131

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000716

AC:

AN:

111690

Hom.:

Cov.:

AF XY:

0.0000295

AC XY:

AN XY:

33842

show subpopulations

Gnomad4 AFR

AF:

0.0000976

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000942

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.0000378

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

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 26, 2022

The c.395G>A (p.R132Q) alteration is located in exon 6 (coding exon 5) of the TIMM17B gene. This alteration results from a G to A substitution at nucleotide position 395, causing the arginine (R) at amino acid position 132 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

0.088

BayesDel_addAF

Benign

-0.52

BayesDel_noAF

Benign

-0.79

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.034

.;T;.;T;T

FATHMM_MKL

Benign

0.22

LIST_S2

Benign

0.85

.;T;T;T;D

M_CAP

Uncertain

0.093

MetaRNN

Benign

0.10

T;T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

-0.20

.;N;.;.;.

MutationTaster

Benign

0.69

N;N

PrimateAI

Uncertain

0.55

PROVEAN

Benign

-0.11

.;N;N;.;.

REVEL

Benign

0.034

Sift

Benign

0.31

.;T;T;.;.

Sift4G

Benign

0.29

T;T;T;T;T

Polyphen

0.016

.;B;.;.;.

Vest4

0.17

MutPred

0.28

.;Loss of catalytic residue at R82 (P = 0.1135);.;.;.;

MVP

0.15

MPC

0.49

ClinPred

0.048

GERP RS

4.5

RBP_binding_hub_radar

0.97

RBP_regulation_power_radar

2.7

Varity_R

0.11

gMVP

0.88

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

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