Genetic Variant RUNX1:p.Pro463Thr (chr21-34792191-G-T) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_001754.5(RUNX1):c.1387C>A(p.Pro463Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000722 in 1,385,328 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P463S) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 7.2e-7 ( 0 hom. )

Consequence

RUNX1
NM_001754.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 9.24

Publications

1 publications found

Variant links:

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

RUNX1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.849

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RUNX1	NM_001754.5 link	c.1387C>A	p.Pro463Thr	missense_variant	Exon 9 of 9	ENST00000675419.1	NP_001745.2	Q01196-8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RUNX1	ENST00000675419.1 link	c.1387C>A	p.Pro463Thr	missense_variant	Exon 9 of 9		NM_001754.5	ENSP00000501943.1		Q01196-8

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000718

AC:

AN:

139258

AF XY:

0.0000132

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000856

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

7.22e-7

AC:

AN:

1385328

Hom.:

Cov.:

AF XY:

0.00000146

AC XY:

AN XY:

684330

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

31658

American (AMR)

AF:

0.00

AC:

AN:

36662

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

24786

East Asian (EAS)

AF:

0.0000276

AC:

AN:

36294

South Asian (SAS)

AF:

0.00

AC:

AN:

78806

European-Finnish (FIN)

AF:

0.00

AC:

AN:

34012

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4788

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1080530

Other (OTH)

AF:

0.00

AC:

AN:

57792

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.275

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.70

BayesDel_addAF

Uncertain

0.050

BayesDel_noAF

Benign

-0.17

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.53

D;.;.;.

Eigen

Pathogenic

0.82

Eigen_PC

Pathogenic

0.77

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Pathogenic

0.99

D;D;.;D

M_CAP

Pathogenic

0.85

MetaRNN

Pathogenic

0.85

D;D;D;D

MetaSVM

Uncertain

-0.25

MutationAssessor

Uncertain

2.2

M;.;.;.

PhyloP100

9.2

PrimateAI

Pathogenic

0.94

PROVEAN

Pathogenic

-5.8

D;D;D;D

REVEL

Uncertain

0.58

Sift

Uncertain

0.0020

D;D;D;D

Sift4G

Benign

0.093

T;T;T;T

Polyphen

1.0

D;D;D;.

Vest4

0.51

MutPred

0.76

Gain of relative solvent accessibility (P = 0.0289);.;.;.;

MVP

0.88

MPC

1.7

ClinPred

0.99

GERP RS

4.9

Varity_R

0.76

gMVP

0.66

Mutation Taster

=36/64

disease causing

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over