21-34880632-T-C

Variant names:

• chr21-34880632-T-C
• rs757288001
• NM_001754.5:c.433A>G

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PP3 PS3_Moderate PM2_Supporting PM1_Supporting

This summary comes from the ClinGen Evidence Repository: NM_001754.5(RUNX1):c.433A>G (p.Arg145Gly) is a missense variant which has a REVEL score ≥ 0.88 (0.925) (PP3). Data from two or more secondary assays (FRET assay and SEUSS) demonstrate altered function, including decreased phosphorylation of RUNX1 and decreased gene expression (PS3_moderate; PMID:33692461, 32943879). This variant is located within the Runt Homology Domain (RHD; AA 89-204) but does not occur in an established hotspot residue (PM1_supporting). It is completely absent from all population databases with at least 20x coverage for RUNX1 (PM2_supporting). In summary, the clinical significance of this variant is uncertain. ACMG/AMP criteria applied, as specified by the Myeloid Malignancy Variant Curation Expert Panel for RUNX1: PS3_moderate, PP3, PM1_supporting, and PM2_supporting. LINK:https://erepo.genome.network/evrepo/ui/classification/CA16616277/MONDO:0011071/008

• Frequency: Genomes: not found (cov: 32)
• Consequence: RUNX1 NM_001754.5 missense
• Clinical Significance: Uncertain significance reviewed by expert panel U:2
• Conservation: PhyloP100: 1.54

Genes affected

RUNX1 (HGNC:10471): (RUNX family transcription factor 1) Core binding factor (CBF) is a heterodimeric transcription factor that binds to the core element of many enhancers and promoters. The protein encoded by this gene represents the alpha subunit of CBF and is thought to be involved in the development of normal hematopoiesis. Chromosomal translocations involving this gene are well-documented and have been associated with several types of leukemia. Three transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

ENSG00000286153 (HGNC:56821): (RUNX1 antisense RNA 1)

ACMG classification

Verdict is Uncertain_significance. Variant got 5 ACMG points.

• PS3: For more information check the summary or visit ClinGen Evidence Repository.
• PM1: For more information check the summary or visit ClinGen Evidence Repository.
• PM2: For more information check the summary or visit ClinGen Evidence Repository.
• PP3: For more information check the summary or visit ClinGen Evidence Repository.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RUNX1	NM_001754.5	c.433A>G	p.Arg145Gly	missense_variant	Exon 5 of 9	ENST00000675419.1	NP_001745.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RUNX1	ENST00000675419.1	c.433A>G	p.Arg145Gly	missense_variant	Exon 5 of 9		NM_001754.5	ENSP00000501943.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: reviewed by expert panel

Submissions by phenotype

Hereditary thrombocytopenia and hematologic cancer predisposition syndrome Uncertain:1

Jan 15, 2025

ClinGen Myeloid Malignancy Variant Curation Expert Panel

Significance: Uncertain significance

Review Status: reviewed by expert panel

Collection Method: curation

NM_001754.5(RUNX1):c.433A>G (p.Arg145Gly) is a missense variant which has a REVEL score ≥ 0.88 (0.925) (PP3). Data from two or more secondary assays (FRET assay and SEUSS) demonstrate altered function, including decreased phosphorylation of RUNX1 and decreased gene expression (PS3_moderate; PMID: 33692461, 32943879). This variant is located within the Runt Homology Domain (RHD; AA 89-204) but does not occur in an established hotspot residue (PM1_supporting). It is completely absent from all population databases with at least 20x coverage for RUNX1 (PM2_supporting). In summary, the clinical significance of this variant is uncertain. ACMG/AMP criteria applied, as specified by the Myeloid Malignancy Variant Curation Expert Panel for RUNX1: PS3_moderate, PP3, PM1_supporting, and PM2_supporting. -

Hereditary thrombocytopenia and hematological cancer predisposition syndrome associated with RUNX1 Uncertain:1

Jun 30, 2021

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In summary, this variant is a novel missense change with uncertain impact on protein function. It has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). This variant is not present in population databases (ExAC no frequency) and has not been reported in the literature in individuals with a RUNX1-related disease. This sequence change replaces arginine with glycine at codon 145 of the RUNX1 protein (p.Arg145Gly). The arginine residue is moderately conserved and there is a moderate physicochemical difference between arginine and glycine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.53	D
BayesDel_noAF	Pathogenic	0.52
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.99	D;.;.;.;.;.;D
Eigen	Uncertain	0.52
Eigen_PC	Uncertain	0.41
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Uncertain	0.97	D;D;.;D;D;D;D
M_CAP	Pathogenic	0.80	D
MetaRNN	Pathogenic	0.95	D;D;D;D;D;D;D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Uncertain	2.9	M;.;.;.;M;.;.
PrimateAI	Pathogenic	0.81	D
PROVEAN	Pathogenic	-6.2	D;D;D;D;D;D;D
REVEL	Pathogenic	0.93
Sift	Pathogenic	0.0	D;D;D;D;D;D;D
Sift4G	Pathogenic	0.0010	D;D;D;D;D;.;D
Polyphen		1.0	D;D;D;.;D;.;.
Vest4		0.96
MutPred		0.81		Loss of methylation at R118 (P = 0.0384);.;.;Loss of methylation at R118 (P = 0.0384);Loss of methylation at R118 (P = 0.0384);.;.;
MVP		0.99
MPC		1.8
ClinPred		0.99	D
GERP RS		4.1
Varity_R		0.98
gMVP		0.97

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: rs757288001; hg19: chr21-36252929; COSMIC: COSV55876947;