X-48894171-C-T

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -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. 12/21 in silico tools predict 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

Publications

0 publications found

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 Gene-Disease associations (from GenCC):

Renpenning syndrome
Inheritance: XL Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P, ClinGen
hamel cerebro-palato-cardiac syndrome
Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet
X-linked intellectual disability, Golabi-Ito-hall type
Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet
X-linked intellectual disability, Porteous type
Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet
X-linked intellectual disability, Sutherland-Haan type
Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet

PQBP1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -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 rank	MANE	Protein
TIMM17B	NM_001395498.1 link	c.245G>A	p.Arg82Gln	missense_variant	Exon 4 of 6	ENST00000696123.1	NP_001382427.1
TIMM17B	NM_001167947.2 link	c.395G>A	p.Arg132Gln	missense_variant	Exon 6 of 8		NP_001161419.1
TIMM17B	NM_001395497.1 link	c.395G>A	p.Arg132Gln	missense_variant	Exon 5 of 7		NP_001382426.1
TIMM17B	NM_005834.5 link	c.245G>A	p.Arg82Gln	missense_variant	Exon 5 of 7		NP_005825.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TIMM17B	ENST00000696123.1 link	c.245G>A	p.Arg82Gln	missense_variant	Exon 4 of 6		NM_001395498.1	ENSP00000512416.1		O60830-1

Frequencies

GnomAD3 genomes

AF:

0.0000716

AC:

AN:

111690

Hom.:

Cov.:

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

GnomAD2 exomes

AF:

0.0000290

AC:

AN:

172153

AF XY:

0.0000511

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 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

African (AFR)

AF:

0.000114

AC:

AN:

26313

American (AMR)

AF:

0.00

AC:

AN:

34869

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19283

East Asian (EAS)

AF:

0.0000333

AC:

AN:

30075

South Asian (SAS)

AF:

0.0000187

AC:

AN:

53482

European-Finnish (FIN)

AF:

0.00

AC:

AN:

40248

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4132

European-Non Finnish (NFE)

AF:

0.0000131

AC:

AN:

839552

Other (OTH)

AF:

0.00

AC:

AN:

45861

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.442

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000716

AC:

AN:

111690

Hom.:

Cov.:

AF XY:

0.0000295

AC XY:

AN XY:

33842

show subpopulations

African (AFR)

AF:

0.0000976

AC:

AN:

30751

American (AMR)

AF:

0.00

AC:

AN:

10508

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

2647

East Asian (EAS)

AF:

0.00

AC:

AN:

3523

South Asian (SAS)

AF:

0.00

AC:

AN:

2702

European-Finnish (FIN)

AF:

0.00

AC:

AN:

6070

Middle Eastern (MID)

AF:

0.00

AC:

AN:

237

European-Non Finnish (NFE)

AF:

0.0000942

AC:

AN:

53054

Other (OTH)

AF:

0.00

AC:

AN:

1514

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.546

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

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

Oct 26, 2022

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

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

(source)

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;.;.;.

PhyloP100

0.91

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

Mutation Taster

=99/1

polymorphism

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

X-48894171-C-T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over