rs1555898641

Positions:

• chr21-34880674-T-C
• chr21-34880674-T-A

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3 PM1_Supporting

This summary comes from the ClinGen Evidence Repository: The NM_001754.4:c.391A>G (p.Thr131Ala) variant affects one of the residues (AA 105-204) within the RHD (PM1_Supporting). This variant is completely absent from all population databases with at least 20x coverage for RUNX1 (PM2). This missense variant has a REVEL score >0.75 (0.942) (PP3). In summary, the clinical significance of this variant is uncertain (VUS). ACMG/AMP criteria applied, as specified by the ClinGen Myeloid Malignancy Variant Curation Expert Panel for RUNX1: PM2, PP3, PM1_supporting. LINK:https://erepo.genome.network/evrepo/ui/classification/CA410202714/MONDO:0011071/008

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000048 (0 hom.)
• Consequence: RUNX1 NM_001754.5 missense
• Clinical Significance: Uncertain significance reviewed by expert panel U:2
• Conservation: PhyloP100: 7.67

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]

LOC112267915 (HGNC:):

RUNX1-AS1 (HGNC:56821): (RUNX1 antisense RNA 1)

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RUNX1	NM_001754.5	c.391A>G	p.Thr131Ala	missense_variant	5/9	ENST00000675419.1
LOC112267915	XR_007067853.1	n.14442T>C		non_coding_transcript_exon_variant	1/2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RUNX1	ENST00000675419.1	c.391A>G	p.Thr131Ala	missense_variant	5/9		NM_001754.5	A1
RUNX1-AS1	ENST00000651798.1	n.662-2809T>C		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000479 AC: 7 AN: 1461848 Hom.: 0 Cov.: 31 AF XY: 0.00000275 AC XY: 2 AN XY: 727226

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: 0.00000540

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: reviewed by expert panel

Submissions by phenotype

Hereditary thrombocytopenia and hematological cancer predisposition syndrome associated with RUNX1 Uncertain:2

Uncertain significance, reviewed by expert panel	curation	ClinGen Myeloid Malignancy Variant Curation Expert Panel	Jul 26, 2019	The NM_001754.4:c.391A>G (p.Thr131Ala) variant affects one of the residues (AA 105-204) within the RHD (PM1_Supporting). This variant is completely absent from all population databases with at least 20x coverage for RUNX1 (PM2). This missense variant has a REVEL score >0.75 (0.942) (PP3). In summary, the clinical significance of this variant is uncertain (VUS). ACMG/AMP criteria applied, as specified by the ClinGen Myeloid Malignancy Variant Curation Expert Panel for RUNX1: PM2, PP3, PM1_supporting. -
Uncertain significance, criteria provided, single submitter	clinical testing	Invitae	Nov 25, 2023	This sequence change replaces threonine, which is neutral and polar, with alanine, which is neutral and non-polar, at codon 131 of the RUNX1 protein (p.Thr131Ala). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with RUNX1-related conditions. ClinVar contains an entry for this variant (Variation ID: 463994). 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) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on RUNX1 protein function. 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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.93
BayesDel_addAF	Pathogenic	0.50	D
BayesDel_noAF	Pathogenic	0.49
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.99	D;.;.;.;.;.;D
Eigen	Pathogenic	0.75
Eigen_PC	Pathogenic	0.72
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.93	D;D;.;D;D;D;D
M_CAP	Pathogenic	0.63	D
MetaRNN	Pathogenic	0.86	D;D;D;D;D;D;D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Uncertain	2.7	M;.;.;.;M;.;.
MutationTaster	Benign	1.0	D;D;D;D;D;D;D
PrimateAI	Pathogenic	0.89	D
PROVEAN	Pathogenic	-4.5	D;D;D;D;D;D;D
REVEL	Pathogenic	0.94
Sift	Uncertain	0.0020	D;D;D;D;D;D;D
Sift4G	Uncertain	0.0030	D;D;D;D;D;.;D
Polyphen		0.99	D;P;P;.;B;.;.
Vest4		0.92
MutPred		0.53		Loss of glycosylation at T104 (P = 0.0452);.;.;Loss of glycosylation at T104 (P = 0.0452);Loss of glycosylation at T104 (P = 0.0452);.;.;
MVP		0.98
MPC		1.6
ClinPred		0.99	D
GERP RS		5.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.89
gMVP		0.87

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: rs1555898641; hg19: chr21-36252971;