rs770244296

Variant names:

• chr8-140287641-C-T
• rs770244296
• NM_001160372.4:c.1948G>A

Variant summary

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

The NM_001160372.4(TRAPPC9):​c.1948G>A​(p.Val650Ile) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000684 in 1,461,892 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000068 (0 hom.)
• Consequence: TRAPPC9 NM_001160372.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:3
• Conservation: PhyloP100: 7.37
• Publications: 0 publications found

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

ACMG classification

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

• BP4: Computational evidence support a benign effect (MetaRNN=0.41548204).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TRAPPC9	NM_001160372.4	c.1948G>A	p.Val650Ile	missense_variant	Exon 13 of 23	ENST00000438773.4	NP_001153844.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TRAPPC9	ENST00000438773.4	c.1948G>A	p.Val650Ile	missense_variant	Exon 13 of 23	1	NM_001160372.4	ENSP00000405060.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000795 AC: 2 AN: 251476 AF XY: 0.00000736

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000879

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.00000684 AC: 10 AN: 1461892 Hom.: 0 Cov.: 32 AF XY: 0.00000963 AC XY: 7 AN XY: 727246

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53418

Middle Eastern (MID) AF: 0.000693 AC: 4 AN: 5768

European-Non Finnish (NFE) AF: 0.00000450 AC: 5 AN: 1112012

Other (OTH) AF: 0.0000166 AC: 1 AN: 60396

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ExAC AF: 0.00000824 AC: 1

EpiCase AF: 0.0000545

EpiControl AF: 0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Uncertain:1

Nov 22, 2016

Genetic Services Laboratory, University of Chicago

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Intellectual disability, autosomal recessive 13 Uncertain:1

Dec 03, 2017

Genomic Research Center, Shahid Beheshti University of Medical Sciences

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided Uncertain:1

-

Breakthrough Genomics, Breakthrough Genomics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.094
BayesDel_addAF	Uncertain	0.065	T
BayesDel_noAF	Benign	-0.13
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Benign	0.027	T;T;.;T
Eigen	Benign	0.14
Eigen_PC	Uncertain	0.30
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Uncertain	0.93	.;.;D;D
M_CAP	Benign	0.0084	T
MetaRNN	Benign	0.42	T;T;T;T
MetaSVM	Benign	-0.95	T
MutationAssessor	Benign	1.2	L;L;.;L
PhyloP100		7.4
PrimateAI	Uncertain	0.58	T
PROVEAN	Benign	-0.43	.;N;N;.
REVEL	Benign	0.13
Sift	Benign	0.21	.;T;T;.
Sift4G	Benign	0.15	.;T;T;.
Polyphen		0.84	P;P;B;P
Vest4		0.74, 0.77
MutPred		0.65		Loss of catalytic residue at V650 (P = 0.0056);Loss of catalytic residue at V650 (P = 0.0056);.;Loss of catalytic residue at V650 (P = 0.0056);
MVP		0.27
MPC		1.2
ClinPred		0.65	D
GERP RS		5.5
Varity_R		0.097
gMVP		0.16
Mutation Taster		=72/28	polymorphism

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

Other links and lift over

dbSNP: rs770244296; hg19: chr8-141297740;