8-139731087-C-G

Variant names:

• chr8-139731087-C-G
• rs140157207
• NM_001160372.4:c.3421G>C

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001160372.4(TRAPPC9):​c.3421G>C​(p.Val1141Leu) variant causes a missense change. The variant allele was found at a frequency of 0.00000137 in 1,461,148 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V1141M) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: TRAPPC9 NM_001160372.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.60
• 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: Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae)
• intellectual disability-obesity-brain malformations-facial dysmorphism syndrome

  Inheritance: AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
• autosomal recessive non-syndromic intellectual disability

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.1730369).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001160372.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TRAPPC9	NM_001160372.4	MANE Select	c.3421G>C	p.Val1141Leu	missense	Exon 23 of 23	NP_001153844.1	Q96Q05-1
	TRAPPC9	NM_001374682.1		c.3442G>C	p.Val1148Leu	missense	Exon 24 of 24	NP_001361611.1
	TRAPPC9	NM_031466.8		c.3421G>C	p.Val1141Leu	missense	Exon 23 of 23	NP_113654.5

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TRAPPC9	ENST00000438773.4	TSL:1 MANE Select	c.3421G>C	p.Val1141Leu	missense	Exon 23 of 23	ENSP00000405060.3	Q96Q05-1
	TRAPPC9	ENST00000520857.5	TSL:1	c.2950G>C	p.Val984Leu	missense	Exon 21 of 21	ENSP00000430116.1	H0YBR0
	TRAPPC9	ENST00000521667.5	TSL:1	n.1826G>C		non_coding_transcript_exon	Exon 12 of 12

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461148 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 726898

African (AFR) AF: 0.00 AC: 0 AN: 33464

American (AMR) AF: 0.00 AC: 0 AN: 44720

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: 86240

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53100

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5438

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1111986

Other (OTH) AF: 0.00 AC: 0 AN: 60364

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.17
BayesDel_addAF	Benign	-0.11	T
BayesDel_noAF	Benign	-0.40
CADD	Benign	18
DANN	Benign	0.97
DEOGEN2	Benign	0.028	T
Eigen	Benign	-0.38
Eigen_PC	Benign	-0.25
FATHMM_MKL	Uncertain	0.78	D
LIST_S2	Benign	0.84	T
M_CAP	Benign	0.024	T
MetaRNN	Benign	0.17	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.55	N
PhyloP100		3.6
PrimateAI	Benign	0.47	T
PROVEAN	Benign	-0.59	N
REVEL	Benign	0.063
Sift	Benign	0.080	T
Sift4G	Benign	0.061	T
Polyphen		0.0	B
Vest4		0.069
MutPred		0.30		Loss of sheet (P = 0.0181)
MVP		0.17
MPC		0.069
ClinPred		0.54	D
GERP RS		2.8
Varity_R		0.065
gMVP		0.44
Mutation Taster		=97/3	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: rs140157207; hg19: chr8-140743330;