21-34887095-A-C

Variant names:

• chr21-34887095-A-C
• ENST00000344691.8:c.18T>G
• RUNX1 p.Asp6Glu

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_001754.5(RUNX1):​c.99T>G​(p.Asp33Glu) variant causes a missense, splice region change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Uncertain significance in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D33Y) has been classified as Uncertain significance. The gene RUNX1 is included in the ClinGen Criteria Specification Registry.

• Frequency: Genomes: not found (cov: 32)
• Consequence: RUNX1 NM_001754.5 missense, splice_region
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.83
• 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: PanelApp Australia, Genomics England PanelApp, Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P
• acute myeloid leukemia

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

ACMG classification

Specifications for RUNX1 are available in the ClinGen Criteria Specification Registry and recommended for reference when assigning criteria.

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

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

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RUNX1	NM_001754.5	MANE Select	c.99T>G	p.Asp33Glu	missense splice_region	Exon 4 of 9	NP_001745.2
	RUNX1	NM_001001890.3		c.18T>G	p.Asp6Glu	missense	Exon 1 of 6	NP_001001890.1	Q01196-1
	RUNX1	NM_001122607.2		c.18T>G	p.Asp6Glu	missense	Exon 1 of 5	NP_001116079.1	Q01196-3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RUNX1	ENST00000344691.8	TSL:1	c.18T>G	p.Asp6Glu	missense	Exon 1 of 6	ENSP00000340690.4	Q01196-1
	RUNX1	ENST00000358356.9	TSL:1	c.18T>G	p.Asp6Glu	missense	Exon 1 of 5	ENSP00000351123.5	Q01196-3
	RUNX1	ENST00000675419.1	MANE Select	c.99T>G	p.Asp33Glu	missense splice_region	Exon 4 of 9	ENSP00000501943.1	Q01196-8

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 35

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.36
BayesDel_addAF	Pathogenic	0.20	D
BayesDel_noAF	Uncertain	0.050
CADD	Pathogenic	26
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.72	D
Eigen	Benign	0.13
Eigen_PC	Uncertain	0.23
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Benign	0.75	T
M_CAP	Pathogenic	0.48	D
MetaRNN	Benign	0.37	T
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Benign	1.9	M
PhyloP100		4.8
PrimateAI	Benign	0.42	T
PROVEAN	Benign	-2.1	N
REVEL	Uncertain	0.45
Sift	Benign	0.073	T
Sift4G	Benign	0.37	T
PromoterAI		0.052	Neutral
Varity_R		0.31
gMVP		0.57
Mutation Taster		=72/28	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.46		Details are displayed if max score is > 0.2
DS_AL_spliceai		0.46		Position offset: 1

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr21-36259392;