1-47775212-C-T

Position:

• chr1-47775212-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_001194986.2(TRABD2B):​c.1307G>A​(p.Arg436Gln) variant causes a missense change. The variant allele was found at a frequency of 0.00000367 in 1,088,970 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: 33)
  • Exomes 𝑓: 0.0000037 (0 hom.)
• Consequence: TRABD2B NM_001194986.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.68

Genes affected

TRABD2B (HGNC:44200): (TraB domain containing 2B) Enables Wnt-protein binding activity and metalloendopeptidase activity. Involved in several processes, including negative regulation of Wnt signaling pathway; positive regulation of protein oxidation; and positive regulation of protein-containing complex assembly. Is integral component of organelle membrane and integral component of plasma membrane. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.40352994).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TRABD2B	NM_001194986.2	c.1307G>A	p.Arg436Gln	missense_variant	6/7	ENST00000606738.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TRABD2B	ENST00000606738.3	c.1307G>A	p.Arg436Gln	missense_variant	6/7	1	NM_001194986.2	P1
TRABD2B	ENST00000435576.2			downstream_gene_variant		3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000367 AC: 4 AN: 1088970 Hom.: 0 Cov.: 31 AF XY: 0.00000388 AC XY: 2 AN XY: 515440

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: 0.00000433

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 18, 2024

The c.1307G>A (p.R436Q) alteration is located in exon 6 (coding exon 6) of the TRABD2B gene. This alteration results from a G to A substitution at nucleotide position 1307, causing the arginine (R) at amino acid position 436 to be replaced by a glutamine (Q). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Uncertain	0.12	D
BayesDel_noAF	Uncertain	-0.060
CADD	Pathogenic	26
DANN	Pathogenic	1.0
DEOGEN2	Benign	0.015	T
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Benign	0.82	T
M_CAP	Pathogenic	0.68	D
MetaRNN	Benign	0.40	T
MutationAssessor	Uncertain	2.0	M
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.62	T
Sift4G	Uncertain	0.048	D
Vest4		0.36
MVP		0.23
MPC		2.0
GERP RS		5.7
Varity_R		0.13
gMVP		0.41

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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

Other links and lift over

dbSNP: rs1294384012; hg19: chr1-48240884;