2-12718537-G-A

Position:

• chr2-12718537-G-A

Variant summary

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

The NM_021643.4(TRIB2):​c.230G>A​(p.Arg77His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: TRIB2 NM_021643.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 10.0

Genes affected

TRIB2 (HGNC:30809): (tribbles pseudokinase 2) This gene encodes one of three members of the Tribbles family. The Tribbles members share a Trb domain, which is homologous to protein serine-threonine kinases, but lacks the active site lysine and probably lacks a catalytic function. The Tribbles proteins interact and modulate the activity of signal transduction pathways in a number of physiological and pathological processes. This Tribbles member induces apoptosis of cells mainly of the hematopoietic origin. It has been identified as a protein up-regulated by inflammatory stimuli in myeloid (THP-1) cells, and also as an oncogene that inactivates the transcription factor C/EBPalpha (CCAAT/enhancer-binding protein alpha) and causes acute myelogenous leukemia. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Mar 2009]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

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

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TRIB2	NM_021643.4	c.230G>A	p.Arg77His	missense_variant	1/3	ENST00000155926.9
TRIB2	NR_027303.2	n.75+1527G>A		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TRIB2	ENST00000155926.9	c.230G>A	p.Arg77His	missense_variant	1/3	1	NM_021643.4	P1
TRIB2	ENST00000405331.3	c.230G>A	p.Arg77His	missense_variant	1/3	2
TRIB2	ENST00000381465.2	c.-139+1527G>A		intron_variant		2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

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

Nov 09, 2023

The c.230G>A (p.R77H) alteration is located in exon 1 (coding exon 1) of the TRIB2 gene. This alteration results from a G to A substitution at nucleotide position 230, causing the arginine (R) at amino acid position 77 to be replaced by a histidine (H). 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	0.33
BayesDel_addAF	Pathogenic	0.33	D
BayesDel_noAF	Pathogenic	0.24
CADD	Pathogenic	32
DANN	Pathogenic	1.0
DEOGEN2	Uncertain	0.56	D;.
Eigen	Pathogenic	0.70
Eigen_PC	Pathogenic	0.71
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Uncertain	0.95	D;D
M_CAP	Benign	0.050	D
MetaRNN	Uncertain	0.60	D;D
MetaSVM	Uncertain	-0.27	T
MutationAssessor	Benign	2.0	M;.
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Uncertain	0.76	T
PROVEAN	Uncertain	-3.2	D;D
REVEL	Uncertain	0.38
Sift	Uncertain	0.0020	D;D
Sift4G	Uncertain	0.038	D;D
Polyphen		1.0	D;.
Vest4		0.60
MutPred		0.61		Loss of methylation at R77 (P = 0.0399);Loss of methylation at R77 (P = 0.0399);
MVP		0.83
MPC		2.1
ClinPred		1.0	D
GERP RS		5.2
Varity_R		0.47
gMVP		0.64

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: rs1027846381; hg19: chr2-12858663;