rs199795381

Positions:

chr16-3026764-G-A

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM2PP3_StrongPP5

The NM_024339.5(THOC6):c.569G>A(p.Gly190Glu) variant causes a missense change. The variant allele was found at a frequency of 0.000213 in 1,613,836 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00022 ( 0 hom. )

Consequence

THOC6
NM_024339.5 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:8U:1O:1

Conservation

PhyloP100: 5.69

Variant links:

Genes affected

THOC6 (HGNC:28369): (THO complex subunit 6) This gene encodes a subunit of the multi-protein THO complex, which is involved in coordination between transcription and mRNA processing. The THO complex is a component of the TREX (transcription/export) complex, which is involved in transcription and export of mRNAs. A missense mutation in this gene is associated with a neurodevelopmental disorder called Beaulieu-Boycott-Innes syndrome. [provided by RefSeq, Dec 2016]

THOC6 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 7 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.969

PP5

Variant 16-3026764-G-A is Pathogenic according to our data. Variant chr16-3026764-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 561208.We mark this variant Likely_pathogenic, oryginal submissions are: {Likely_pathogenic=2, not_provided=1, Uncertain_significance=1, Pathogenic=2}. Variant chr16-3026764-G-A is described in Lovd as [Likely_pathogenic]. Variant chr16-3026764-G-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
THOC6	NM_024339.5 linkuse as main transcript	c.569G>A	p.Gly190Glu	missense_variant	8/13	ENST00000326266.13	NP_077315.2
THOC6	NM_001347704.2 linkuse as main transcript	c.569G>A	p.Gly190Glu	missense_variant	9/14		NP_001334633.1
THOC6	NM_001347703.2 linkuse as main transcript	c.497G>A	p.Gly166Glu	missense_variant	9/14		NP_001334632.1
THOC6	NM_001142350.3 linkuse as main transcript	c.569G>A	p.Gly190Glu	missense_variant	8/12		NP_001135822.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
THOC6	ENST00000326266.13 linkuse as main transcript	c.569G>A	p.Gly190Glu	missense_variant	8/13	1	NM_024339.5	ENSP00000326531	P1	Q86W42-1

Frequencies

GnomAD3 genomes

AF:

0.000131

AC:

AN:

152188

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

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:

0.000265

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000100

AC:

AN:

250076

Hom.:

AF XY:

0.000111

AC XY:

AN XY:

135264

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000290

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:

0.000212

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000221

AC:

323

AN:

1461648

Hom.:

Cov.:

AF XY:

0.000215

AC XY:

156

AN XY:

727096

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:

0.000283

Gnomad4 OTH exome

AF:

0.000132

GnomAD4 genome

AF:

0.000131

AC:

AN:

152188

Hom.:

Cov.:

AF XY:

0.0000807

AC XY:

AN XY:

74344

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.0000655

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000265

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000213

Hom.:

Bravo

AF:

0.000128

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000581

AC:

ExAC

AF:

0.000107

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.0000594

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:8Uncertain:1Other:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

THOC6-related developmental delay-microcephaly-facial dysmorphism syndrome

Pathogenic:3Uncertain:1Other:1

Pathogenic, criteria provided, single submitter	clinical testing	Baylor Genetics	Dec 17, 2023	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Equipe Genetique des Anomalies du Developpement, Université de Bourgogne	Jan 01, 2014	- -
Pathogenic, no assertion criteria provided	literature only	OMIM	Nov 07, 2020	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	Victorian Clinical Genetics Services, Murdoch Childrens Research Institute	Aug 28, 2019	A homozygous missense variant was identified, NM_024339.4(THOC6):c.569G>A in exon 8 of 13 of the THOC6 gene. This substitution is predicted to cause a moderate amino acid change from glycine to glutamic acid at position 190 of the protein, NP_077315.2(THOC6):p.(Gly190Glu). The glycine at this position has high conservation (100 vertebrates, UCSC), and is located in the WD4 functional domain. In silico software predicts the missense variant to be disease causing (Polyphen, SIFT, CADD, Mutation Taster). The variant is present in the gnomAD population database at a frequency of 0.0002% (28 heterozygotes, 0 homozygotes). It has been previously reported in patients with Beaulieu-Boycott-Innes syndrome (ClinVar, Amos, J. et al (2017), Mattioli, F. et al (2019)). In addition, functional studies show that this variant causes abnormal nuclear localisation and decreased THOC1/THOC5 interaction (Mattioli, F. et al (2019)). Based on information available at the time of curation, this variant has been classified as LIKELY PATHOGENIC. -
not provided, no classification provided	literature only	GeneReviews	-	- -

not provided

Pathogenic:4

Likely pathogenic, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Pathogenic, criteria provided, single submitter	clinical testing	GeneDx	Apr 29, 2023	Published functional studies demonstrate a damaging effect where G190E is detrimental to protein function (Mattioli et al., 2018); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 27102954, 30476144, 31421288, 31216405, 34740920, 27535533) -
Likely pathogenic, no assertion criteria provided	clinical testing	Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen	-	- -
Likely pathogenic, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -

THOC6-related disorder

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Jan 17, 2023

The THOC6 c.569G>A variant is predicted to result in the amino acid substitution p.Gly190Glu. This variant was reported in the compound heterozygous state in at least three unrelated individuals with intellectual disability and/or neurodevelopmental phenotypes (Amos et al. 2017. PubMed ID: 27102954; Mattioli et al. 2019. PubMed ID: 30476144; Liu et al. 2019. PubMed ID: 31216405). Functional studies showed that this variant results in abnormal subcellular localization and impaired protein-protein interaction (Mattioli et al. 2019. PubMed ID: 30476144). This variant is reported in 0.020% of alleles in individuals of European (Non-Finnish) descent in gnomAD (http://gnomad.broadinstitute.org/variant/16-3076765-G-A). This variant is interpreted as likely pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.99

BayesDel_addAF

Uncertain

0.13

BayesDel_noAF

Pathogenic

0.24

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.24

T;.;.;.

Eigen

Pathogenic

0.70

Eigen_PC

Uncertain

0.63

FATHMM_MKL

Uncertain

0.94

LIST_S2

Uncertain

0.97

D;.;D;D

M_CAP

Uncertain

0.13

MetaRNN

Pathogenic

0.97

D;D;D;D

MetaSVM

Uncertain

-0.26

MutationAssessor

Uncertain

2.5

M;.;.;M

MutationTaster

Benign

1.0

D;D;D;D

PrimateAI

Uncertain

0.72

PROVEAN

Pathogenic

-8.0

D;.;.;D

REVEL

Pathogenic

0.65

Sift4G

Pathogenic

0.0

D;D;D;D

Polyphen

1.0

D;.;.;D

Vest4

0.98

MVP

0.90

MPC

0.56

ClinPred

0.75

GERP RS

5.6

Varity_R

0.93

gMVP

0.82

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