8-140371021-G-C

Variant names:

• chr8-140371021-G-C
• rs1554676260
• NM_001160372.4:c.1294C>G

Variant summary

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

The NM_001160372.4(TRAPPC9):​c.1294C>G​(p.Leu432Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,892 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. L432I) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: TRAPPC9 NM_001160372.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.62
• 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 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

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.1294C>G	p.Leu432Val	missense	Exon 8 of 23	NP_001153844.1	Q96Q05-1
	TRAPPC9	NM_001374682.1		c.1315C>G	p.Leu439Val	missense	Exon 9 of 24	NP_001361611.1
	TRAPPC9	NM_031466.8		c.1294C>G	p.Leu432Val	missense	Exon 8 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.1294C>G	p.Leu432Val	missense	Exon 8 of 23	ENSP00000405060.3	Q96Q05-1
	TRAPPC9	ENST00000520857.5	TSL:1	c.823C>G	p.Leu275Val	missense	Exon 6 of 21	ENSP00000430116.1	H0YBR0
	TRAPPC9	ENST00000889106.1		c.1315C>G	p.Leu439Val	missense	Exon 9 of 24	ENSP00000559165.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461892 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 727248

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: 0.0000252 AC: 1 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: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1112012

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.75
BayesDel_addAF	Pathogenic	0.37	D
BayesDel_noAF	Pathogenic	0.29
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Benign	0.072	T
Eigen	Uncertain	0.42
Eigen_PC	Uncertain	0.48
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.94	D
M_CAP	Benign	0.015	T
MetaRNN	Uncertain	0.67	D
MetaSVM	Benign	-0.44	T
MutationAssessor	Benign	1.9	L
PhyloP100		7.6
PrimateAI	Uncertain	0.75	T
PROVEAN	Benign	-1.9	N
REVEL	Benign	0.21
Sift	Uncertain	0.0090	D
Sift4G	Uncertain	0.013	D
Polyphen		0.98	D
Vest4		0.79
MutPred		0.37		Loss of ubiquitination at K430 (P = 0.0982)
MVP		0.34
MPC		1.3
ClinPred		0.81	D
GERP RS		5.5
Varity_R		0.38
gMVP		0.70
Mutation Taster		=66/34	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: rs1554676260; hg19: chr8-141381120;