21-34799407-G-C

Variant names:

• chr21-34799407-G-C
• rs121912499
• NM_001754.5:c.861C>G

Variant summary

Our verdict is Pathogenic. The variant received 11 ACMG points: 11P and 0B. PM5_Supporting PVS1 PP1 PM2_Supporting

This summary comes from the ClinGen Evidence Repository: NM_001754.5(RUNX1):c.861C>G (p.Tyr287Ter) is a nonsense variant which affects all biologically relevant isoforms. This variant is a nonsense variant between c.98 - c.916, ranking at PVS1 according to the RUNX1 decision tree (PVS1). This variant was found to co-segregate with disease in 3 affected family members (PMID:11830488, Pedigree 3) (PP1). This variant is completely absent from all population databases with at least 20x coverage for RUNX1 (PM2_supporting). This variant is a nonsense/frameshift variants that is downstream of c.98 (PM5_Supporting). In summary, this variant meets criteria to be classified as pathogenic. ACMG/AMP criteria applied, as specified by the Myeloid Malignancy Variant Curation Expert Panel for RUNX1: PVS1, PP1, PM2_supporting, PM5_supporting. LINK:https://erepo.genome.network/evrepo/ui/classification/CA410150112/MONDO:0011071/008

• Frequency: Genomes: not found (cov: 32)
• Consequence: RUNX1 NM_001754.5 stop_gained
• Clinical Significance: Pathogenic reviewed by expert panel P:2
• Conservation: PhyloP100: 3.07
• Publications: 14 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: Pathogenic. The variant received 11 ACMG points.

• PVS1: For more information check the summary or visit ClinGen Evidence Repository.
• PM2: For more information check the summary or visit ClinGen Evidence Repository.
• PM5: For more information check the summary or visit ClinGen Evidence Repository.
• PP1: 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.861C>G	p.Tyr287*	stop_gained	Exon 8 of 9	ENST00000675419.1	NP_001745.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RUNX1	ENST00000675419.1	c.861C>G	p.Tyr287*	stop_gained	Exon 8 of 9		NM_001754.5	ENSP00000501943.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2

Revision: reviewed by expert panel

Submissions by phenotype

Hereditary thrombocytopenia and hematologic cancer predisposition syndrome Pathogenic:1

Dec 09, 2023

ClinGen Myeloid Malignancy Variant Curation Expert Panel

Significance: Pathogenic

Review Status: reviewed by expert panel

Collection Method: curation

NM_001754.5(RUNX1):c.861C>G (p.Tyr287Ter) is a nonsense variant which affects all biologically relevant isoforms. This variant is a nonsense variant between c.98 - c.916, ranking at PVS1 according to the RUNX1 decision tree (PVS1). This variant was found to co-segregate with disease in 3 affected family members (PMID: 11830488, Pedigree 3) (PP1). This variant is completely absent from all population databases with at least 20x coverage for RUNX1 (PM2_supporting). This variant is a nonsense/frameshift variants that is downstream of c.98 (PM5_Supporting). In summary, this variant meets criteria to be classified as pathogenic. ACMG/AMP criteria applied, as specified by the Myeloid Malignancy Variant Curation Expert Panel for RUNX1: PVS1, PP1, PM2_supporting, PM5_supporting.

Thrombocytopenia Pathogenic:1

Feb 01, 2019

NIHR Bioresource Rare Diseases, University of Cambridge

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: research

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.63
CADD	Pathogenic	36
DANN	Uncertain	1.0
DEOGEN2	Benign	0.0	.;.;.;.
Eigen	Pathogenic	0.87
Eigen_PC	Pathogenic	0.76
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Benign	0.0	.;.;.;.
MetaRNN	Benign	0.0	.;.;.;.
MutationAssessor	Benign	0.0	.;.;.;.
PhyloP100		3.1
PROVEAN	Benign	0.0	.;.;.;.
REVEL	Benign	0.0
Sift	Pathogenic	0.0	.;.;.;.
Sift4G	Pathogenic	0.0	.;.;.;.
Vest4		0.95
GERP RS		5.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Mutation Taster		=4/196	disease causing (ClinVar)

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: rs121912499; hg19: chr21-36171704;