chr8-140287691-G-A

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 0P and 1B. BP4

The NM_001160372.4(TRAPPC9):c.1898C>T(p.Ala633Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00038 in 1,614,170 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Synonymous variant affecting the same amino acid position (i.e. A633A) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00036 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00038 ( 1 hom. )

Consequence

TRAPPC9
NM_001160372.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:6

Conservation

PhyloP100: 9.34

Publications

2 publications found

Variant links:

Genes affected

TRAPPC9 (HGNC:30832): (trafficking protein particle complex subunit 9) This gene encodes a protein that likely plays a role in NF-kappa-B signaling. Mutations in this gene have been associated with autosomal-recessive cognitive disability. Alternatively spliced transcript variants have been described.[provided by RefSeq, Feb 2010]

TRAPPC9 Gene-Disease associations (from GenCC):

intellectual disability, autosomal recessive 13
Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
intellectual disability-obesity-brain malformations-facial dysmorphism syndrome
Inheritance: AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
autosomal recessive non-syndromic intellectual disability
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

TRAPPC9 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -1 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.4021678).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TRAPPC9	NM_001160372.4 link	c.1898C>T	p.Ala633Val	missense_variant	Exon 13 of 23	ENST00000438773.4	NP_001153844.1	Q96Q05-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TRAPPC9	ENST00000438773.4 link	c.1898C>T	p.Ala633Val	missense_variant	Exon 13 of 23	1	NM_001160372.4	ENSP00000405060.3		Q96Q05-1

Frequencies

GnomAD3 genomes

AF:

0.000361

AC:

AN:

152166

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000169

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000415

Gnomad FIN

AF:

0.000754

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.000514

Gnomad OTH

AF:

0.000480

GnomAD2 exomes

AF:

0.000422

AC:

106

AN:

251412

AF XY:

0.000412

show subpopulations

Gnomad AFR exome

AF:

0.000123

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00153

Gnomad NFE exome

AF:

0.000528

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000382

AC:

558

AN:

1461888

Hom.:

Cov.:

AF XY:

0.000375

AC XY:

273

AN XY:

727244

show subpopulations

African (AFR)

AF:

0.0000896

AC:

AN:

33480

American (AMR)

AF:

0.0000224

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.000452

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00124

AC:

AN:

53416

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000373

AC:

415

AN:

1112010

Other (OTH)

AF:

0.000563

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.483

Heterozygous variant carriers

132

165

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000361

AC:

AN:

152282

Hom.:

Cov.:

AF XY:

0.000295

AC XY:

AN XY:

74454

show subpopulations

African (AFR)

AF:

0.000168

AC:

AN:

41572

American (AMR)

AF:

0.0000654

AC:

AN:

15288

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5188

South Asian (SAS)

AF:

0.000415

AC:

AN:

4818

European-Finnish (FIN)

AF:

0.000754

AC:

AN:

10604

Middle Eastern (MID)

AF:

0.00340

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000514

AC:

AN:

68032

Other (OTH)

AF:

0.000475

AC:

AN:

2104

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.473

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000351

Hom.:

Bravo

AF:

0.000287

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000814

AC:

ExAC

AF:

0.000436

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.000436

EpiControl

AF:

0.000296

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Intellectual disability, autosomal recessive 13

Uncertain:3

Aug 29, 2019

Baylor Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was determined to be of uncertain significance according to ACMG Guidelines, 2015 [PMID:25741868]. -

Dec 22, 2023

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Aug 26, 2022

Pittsburgh Clinical Genomics Laboratory, University of Pittsburgh Medical Center

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence variant is a single nucleotide substitution (C>T) at coding position 1898 of the TRAPPC9 gene that results in an alanine to valine amino acid change at residue 633 of the TRAPPC9 protein. This is a previously reported variant (ClinVar) that has been observed in the literature in a cohort of individuals with severe specific language impairment (PMID: 28440294). This variant is present in healthy population datasets (gnomAD database, 114 of 282816 alleles or 0.04%). Multiple bioinformatic tools predict that this variant would be damaging, and the Ala633 residue is highly conserved across the vertebrate species examined. Functiol studies testing the effect of this variant on protein structure or activity have not been performed, to our knowledge. At this time, there is insufficient evidence to determine if this variant is pathogenic or benign. Therefore, we consider this to be a variant of uncertain significance. ACMG Criteria: BP1, PP3 -

not provided

Uncertain:2

Oct 06, 2020

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Jul 01, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces alanine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 731 of the TRAPPC9 protein (p.Ala731Val). This variant is present in population databases (rs375300224, gnomAD 0.1%). This variant has not been reported in the literature in individuals affected with TRAPPC9-related conditions. ClinVar contains an entry for this variant (Variation ID: 212421). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Not Available"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Not Available"). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

not specified

Uncertain:1

Aug 08, 2014

Genetic Services Laboratory, University of Chicago

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.53

BayesDel_addAF

Uncertain

0.068

BayesDel_noAF

Pathogenic

0.21

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.046

T;T;.;T

Eigen

Uncertain

0.51

Eigen_PC

Uncertain

0.49

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.95

.;.;D;D

M_CAP

Benign

0.038

MetaRNN

Benign

0.40

T;T;T;T

MetaSVM

Benign

-0.61

MutationAssessor

Benign

1.8

L;L;.;L

PhyloP100

9.3

PrimateAI

Uncertain

0.77

PROVEAN

Benign

-1.9

.;N;N;.

REVEL

Uncertain

0.44

Sift

Uncertain

0.010

.;D;D;.

Sift4G

Uncertain

0.023

.;D;D;.

Polyphen

1.0

D;D;D;D

Vest4

0.82, 0.81

MVP

0.33

MPC

1.4

ClinPred

0.21

GERP RS

5.4

Varity_R

0.32

gMVP

0.52

Mutation Taster

=50/50

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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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