21-34799419-C-G

Position:

• chr21-34799419-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 1P and 0B. PS4_Supporting

This summary comes from the ClinGen Evidence Repository: NM_001754.5(RUNX1):c.849G>C (p.Gln283His) is a missense variant which has been reported in one proband meeting at least one of the RUNX1-phenotypic criteria (PS4_ Supporting; PMID:36819173). 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: PS4_supporting. LINK:https://erepo.genome.network/evrepo/ui/classification/CA320255629/MONDO:0011071/008

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000027 (0 hom.)
• Consequence: RUNX1 NM_001754.5 missense
• Clinical Significance: Uncertain significance reviewed by expert panel U:3
• Conservation: PhyloP100: 1.17

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]

RUNX1 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PS4: For more information check the summary or visit ClinGen Evidence Repository.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RUNX1	NM_001754.5	c.849G>C	p.Gln283His	missense_variant	8/9	ENST00000675419.1	NP_001745.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RUNX1	ENST00000675419.1	c.849G>C	p.Gln283His	missense_variant	8/9		NM_001754.5	ENSP00000501943.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000274 AC: 4 AN: 1461864 Hom.: 0 Cov.: 31 AF XY: 0.00000275 AC XY: 2 AN XY: 727234

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: 0.00000270

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 32

Bravo AF: 0.0000113

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: reviewed by expert panel

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 06, 2024

The p.Q283H variant (also known as c.849G>C), located in coding exon 7 of the RUNX1 gene, results from a G to C substitution at nucleotide position 849. The glutamine at codon 283 is replaced by histidine, an amino acid with highly similar properties. This amino acid position is highly conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Based on the available evidence, the clinical significance of this variant remains unclear. -

Hereditary thrombocytopenia and hematologic cancer predisposition syndrome Uncertain:1

Uncertain significance, reviewed by expert panel

curation

ClinGen Myeloid Malignancy Variant Curation Expert Panel

Oct 29, 2024

NM_001754.5(RUNX1):c.849G>C (p.Gln283His) is a missense variant which has been reported in one proband meeting at least one of the RUNX1-phenotypic criteria (PS4_ Supporting; PMID: 36819173). 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: PS4_supporting. -

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

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 05, 2022

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt RUNX1 protein function. ClinVar contains an entry for this variant (Variation ID: 464011). This variant has not been reported in the literature in individuals affected with RUNX1-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces glutamine, which is neutral and polar, with histidine, which is basic and polar, at codon 283 of the RUNX1 protein (p.Gln283His). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.26
BayesDel_addAF	Uncertain	0.15	D
BayesDel_noAF	Uncertain	-0.030
CADD	Benign	22
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.84	D;.;.;.
Eigen	Uncertain	0.25
Eigen_PC	Uncertain	0.23
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Uncertain	0.93	D;D;.;D
M_CAP	Benign	0.069	D
MetaRNN	Uncertain	0.71	D;D;D;D
MetaSVM	Uncertain	0.11	D
MutationAssessor	Uncertain	2.4	M;.;.;.
PrimateAI	Uncertain	0.70	T
PROVEAN	Uncertain	-2.5	N;D;D;D
REVEL	Uncertain	0.61
Sift	Benign	0.031	D;D;D;D
Sift4G	Benign	0.12	T;T;T;T
Polyphen		0.89	P;D;D;.
Vest4		0.79
MutPred		0.28		Gain of relative solvent accessibility (P = 0.1571);.;.;.;
MVP		0.91
MPC		1.4
ClinPred		0.95	D
GERP RS		4.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.15
gMVP		0.69

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: rs1056623039; hg19: chr21-36171716;