8-140458473-C-T

Position:

• chr8-140458473-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_031466.8(TRAPPC9):​c.-203G>A variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000563 in 1,420,050 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000056 (0 hom.)
• Consequence: TRAPPC9 NM_031466.8 5_prime_UTR
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.75

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]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.05728379).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TRAPPC9	XM_011517326.3	c.92G>A	p.Arg31Gln	missense_variant	1/22		XP_011515628.1
TRAPPC9	XM_011517328.3	c.92G>A	p.Arg31Gln	missense_variant	1/22		XP_011515630.1
TRAPPC9	XM_047422294.1	c.92G>A	p.Arg31Gln	missense_variant	1/21		XP_047278250.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TRAPPC9	ENST00000648948.2	c.-203G>A		5_prime_UTR_variant	1/23			ENSP00000498020.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD3 exomes AF: 0.00000572 AC: 1 AN: 174764 Hom.: 0 AF XY: 0.0000105 AC XY: 1 AN XY: 94806

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 SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000140

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000563 AC: 8 AN: 1420050 Hom.: 0 Cov.: 34 AF XY: 0.00000427 AC XY: 3 AN XY: 702774

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: 0.00000733

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Benign	-0.23	T
BayesDel_noAF	Benign	-0.56
CADD	Benign	3.0
DANN	Uncertain	1.0
Eigen	Benign	-1.4
Eigen_PC	Benign	-1.5
FATHMM_MKL	Benign	0.059	N
LIST_S2	Benign	0.47	T
M_CAP	Benign	0.0049	T
MetaRNN	Benign	0.057	T
MetaSVM	Benign	-1.0	T
PrimateAI	Uncertain	0.49	T
PROVEAN	Benign	-0.060	N
REVEL	Benign	0.010
Sift	Pathogenic	0.0	D
Sift4G	Benign	0.43	T
Polyphen		0.0010	B
Vest4		0.15
MutPred		0.22		Loss of glycosylation at S36 (P = 0.3372);
MVP		0.030
MPC		0.58
ClinPred		0.19	T
GERP RS		-2.4
gMVP		0.17

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs797046049; hg19: chr8-141468572;