Genetic Variant TRAPPC8:p.Ile1264Val (chr18-31846763-T-C) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 2P and 6B. PM2BP4_StrongBP6_Moderate

The NM_014939.5(TRAPPC8):c.3790A>G(p.Ile1264Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000645 in 1,613,126 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: 𝑓 0.00026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000044 ( 0 hom. )

Consequence

TRAPPC8
NM_014939.5 missense

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 0.0810

Variant links:

Genes affected

TRAPPC8 (HGNC:29169): (trafficking protein particle complex subunit 8) Involved in Golgi organization. Part of TRAPP complex. [provided by Alliance of Genome Resources, Apr 2022]

TRAPPC8 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.02200973).

BP6

Variant 18-31846763-T-C is Benign according to our data. Variant chr18-31846763-T-C is described in ClinVar as [Likely_benign]. Clinvar id is 2373319.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TRAPPC8	NM_014939.5 link	c.3790A>G	p.Ile1264Val	missense_variant	Exon 26 of 29	ENST00000283351.10	NP_055754.3	Q9Y2L5-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TRAPPC8	ENST00000283351.10 link	c.3790A>G	p.Ile1264Val	missense_variant	Exon 26 of 29	1	NM_014939.5	ENSP00000283351.4		Q9Y2L5-1

Frequencies

GnomAD3 genomes

AF:

0.000263

AC:

AN:

152160

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000917

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

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:

0.00

GnomAD3 exomes

AF:

0.0000597

AC:

AN:

251314

Hom.:

AF XY:

0.0000663

AC XY:

AN XY:

135848

show subpopulations

Gnomad AFR exome

AF:

0.000861

Gnomad AMR exome

AF:

0.00

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:

0.00000880

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000438

AC:

AN:

1460848

Hom.:

Cov.:

AF XY:

0.0000468

AC XY:

AN XY:

726714

show subpopulations

Gnomad4 AFR exome

AF:

0.00108

Gnomad4 AMR exome

AF:

0.0000448

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:

0.0000135

Gnomad4 OTH exome

AF:

0.000182

GnomAD4 genome

AF:

0.000263

AC:

AN:

152278

Hom.:

Cov.:

AF XY:

0.000282

AC XY:

AN XY:

74450

show subpopulations

Gnomad4 AFR

AF:

0.000914

Gnomad4 AMR

AF:

0.000131

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:

0.00

Alfa

AF:

0.0000570

Hom.:

Bravo

AF:

0.000291

ESP6500AA

AF:

0.000908

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000576

AC:

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Benign:1

Aug 09, 2021

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.062

BayesDel_addAF

Benign

-0.67

BayesDel_noAF

Benign

-0.80

CADD

Benign

DANN

Benign

0.83

DEOGEN2

Benign

0.0018

T;T

Eigen

Benign

-0.85

Eigen_PC

Benign

-0.69

FATHMM_MKL

Benign

0.41

LIST_S2

Benign

0.79

T;T

M_CAP

Benign

0.0034

MetaRNN

Benign

0.022

T;T

MetaSVM

Benign

-0.97

MutationAssessor

Benign

-0.41

N;.

PrimateAI

Benign

0.32

PROVEAN

Benign

0.26

N;.

REVEL

Benign

0.081

Sift

Benign

0.39

T;.

Sift4G

Benign

0.30

T;T

Polyphen

0.0

B;.

Vest4

0.13

MVP

0.043

MPC

0.10

ClinPred

0.0088

GERP RS

-2.7

Varity_R

0.016

gMVP

0.18

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