12-53501445-G-A

Position:

• chr12-53501445-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_134323.2(TARBP2):​c.37G>A​(p.Gly13Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: TARBP2 NM_134323.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.43

Genes affected

TARBP2 (HGNC:11569): (TARBP2 subunit of RISC loading complex) HIV-1, the causative agent of acquired immunodeficiency syndrome (AIDS), contains an RNA genome that produces a chromosomally integrated DNA during the replicative cycle. Activation of HIV-1 gene expression by the transactivator Tat is dependent on an RNA regulatory element (TAR) located downstream of the transcription initiation site. The protein encoded by this gene binds between the bulge and the loop of the HIV-1 TAR RNA regulatory element and activates HIV-1 gene expression in synergy with the viral Tat protein. Alternative splicing results in multiple transcript variants encoding different isoforms. This gene also has a pseudogene. [provided by RefSeq, Jul 2008]

(HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.1424076).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TARBP2	NM_134323.2	c.37G>A	p.Gly13Ser	missense_variant	1/9	ENST00000266987.7
TARBP2	XM_047429485.1	c.37G>A	p.Gly13Ser	missense_variant	1/7
MAP3K12	XM_011538725.4	c.-1455C>T		5_prime_UTR_variant	1/14
TARBP2	NM_004178.5	c.-6+444G>A		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TARBP2	ENST00000266987.7	c.37G>A	p.Gly13Ser	missense_variant	1/9	1	NM_134323.2	P4
	ENST00000602306.2	n.131C>T		non_coding_transcript_exon_variant	1/1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1416338 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 700216

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: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

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

Jun 10, 2024

The c.37G>A (p.G13S) alteration is located in exon 1 (coding exon 1) of the TARBP2 gene. This alteration results from a G to A substitution at nucleotide position 37, causing the glycine (G) at amino acid position 13 to be replaced by a serine (S). 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	0.082
BayesDel_addAF	Benign	-0.042	T
BayesDel_noAF	Benign	-0.30
CADD	Benign	23
DANN	Uncertain	0.98
DEOGEN2	Benign	0.093	T;.
Eigen	Benign	-0.24
Eigen_PC	Benign	-0.056
FATHMM_MKL	Benign	0.30	N
LIST_S2	Benign	0.76	T;T
M_CAP	Benign	0.031	D
MetaRNN	Benign	0.14	T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.14	N;.
MutationTaster	Benign	0.94	D;D;N
PROVEAN	Benign	0.19	N;N
REVEL	Benign	0.069
Sift	Benign	0.19	T;D
Sift4G	Benign	0.74	T;D
Polyphen		0.12	B;.
Vest4		0.13
MutPred		0.37		Gain of catalytic residue at L16 (P = 0);Gain of catalytic residue at L16 (P = 0);
MVP		0.50
MPC		0.78
ClinPred		0.51	D
GERP RS		4.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.7
Varity_R		0.13
gMVP		0.19

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

Publications

LitVar

Other links and lift over

dbSNP: rs1943697628; hg19: chr12-53895229;