21-34799369-G-C

Variant names:

• chr21-34799369-G-C
• rs758682659
• NM_001754.5:c.899C>G

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 0P and 0B.

This summary comes from the ClinGen Evidence Repository: NM_001754.5(RUNX1):c.899C>G (p.Thr300Arg) is a missense variant which does not meet any ACMG/AMP criteria. 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: None. LINK:https://erepo.genome.network/evrepo/ui/classification/CA410149697/MONDO:0011071/008

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: RUNX1 NM_001754.5 missense
• Clinical Significance: Uncertain significance reviewed by expert panel U:2
• Conservation: PhyloP100: 5.24
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• hereditary thrombocytopenia and hematologic cancer predisposition syndrome

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
• hereditary thrombocytopenia and hematological cancer predisposition syndrome associated with RUNX1

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Genomics England PanelApp, G2P, Labcorp Genetics (formerly Invitae)
• acute myeloid leukemia

  Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001754.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RUNX1	NM_001754.5	MANE Select	c.899C>G	p.Thr300Arg	missense	Exon 8 of 9	NP_001745.2
	RUNX1	NM_001001890.3		c.818C>G	p.Thr273Arg	missense	Exon 5 of 6	NP_001001890.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RUNX1	ENST00000675419.1	MANE Select	c.899C>G	p.Thr300Arg	missense	Exon 8 of 9	ENSP00000501943.1
	RUNX1	ENST00000300305.7	TSL:1	c.899C>G	p.Thr300Arg	missense	Exon 7 of 8	ENSP00000300305.3
	RUNX1	ENST00000344691.8	TSL:1	c.818C>G	p.Thr273Arg	missense	Exon 5 of 6	ENSP00000340690.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461888 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 727246

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53420

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1112006

Other (OTH) AF: 0.0000166 AC: 1 AN: 60396

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

Sep 12, 2024

ClinGen Myeloid Malignancy Variant Curation Expert Panel

Significance: Uncertain significance

Review Status: reviewed by expert panel

Collection Method: curation

NM_001754.5(RUNX1):c.899C>G (p.Thr300Arg) is a missense variant which does not meet any ACMG/AMP criteria. 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: None.

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

Apr 12, 2021

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). This variant has not been reported in the literature in individuals with RUNX1-related conditions. This variant is not present in population databases (ExAC no frequency). This sequence change replaces threonine with arginine at codon 300 of the RUNX1 protein (p.Thr300Arg). The threonine residue is moderately conserved and there is a moderate physicochemical difference between threonine and arginine.

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.76
BayesDel_addAF	Pathogenic	0.22	D
BayesDel_noAF	Uncertain	0.070
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.80	D
Eigen	Uncertain	0.56
Eigen_PC	Uncertain	0.61
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.96	D
M_CAP	Benign	0.083	D
MetaRNN	Uncertain	0.65	D
MetaSVM	Uncertain	0.59	D
MutationAssessor	Uncertain	2.3	M
PhyloP100		5.2
PrimateAI	Uncertain	0.67	T
PROVEAN	Uncertain	-2.5	N
REVEL	Uncertain	0.53
Sift	Uncertain	0.0020	D
Sift4G	Uncertain	0.037	D
Polyphen		0.99	D
Vest4		0.73
MutPred		0.32		Loss of glycosylation at T273 (P = 0.0078)
MVP		0.95
MPC		1.6
ClinPred		0.90	D
GERP RS		5.8
Varity_R		0.43
gMVP		0.73
Mutation Taster		=51/49	polymorphism

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

Other links and lift over

dbSNP: rs758682659; hg19: chr21-36171666;