rs587776810

Variant names:

• chr21-34880553-GT-G
• rs587776810
• NM_001754.5:c.508+3delA

Variant summary

Our verdict is Pathogenic. Variant got 11 ACMG points: 11P and 0B. PP3 PS4_Supporting PM2_Supporting PS3 PP1_Strong

This summary comes from the ClinGen Evidence Repository: There is RT-PCR assay evidence demonstrating that the NM_001754.4:c.508+3delA variant creates a cryptic splice donor site that is used and results in a frameshift and introduction of premature termination codon (PS3; PMID:11830488). This variant was found to co-segregate with disease in multiple affected family members, with eight meioses observed in one family (PP1_Strong; PMID:11830488). It is absent from all population databases with at least 20x coverage for RUNX1 (PM2_supporting). This intronic variant (in intron 5) is located in reference to the exon at positions +3 for donor splice site and has a predicted decrease in the score of the canonical splice site by at least 75% (measured by both MES and SSF). This variant has been reported in one proband meeting at least one of the RUNX1-phenotypic criteria (PS4_Supporting; PMID:11830488). 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: PS3, PP1_Strong, PM2_supporting, PP3, PS4_Supporting. LINK:https://erepo.genome.network/evrepo/ui/classification/CA248618/MONDO:0011071/008

• Frequency: Genomes: not found (cov: 33)
• Consequence: RUNX1 NM_001754.5 splice_region, intron
• Clinical Significance: Pathogenic reviewed by expert panel P:3
• Conservation: PhyloP100: 1.20

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]

ENSG00000286153 (HGNC:56821): (RUNX1 antisense RNA 1)

ACMG classification

Verdict is Pathogenic. Variant got 11 ACMG points.

• PS3: For more information check the summary or visit ClinGen Evidence Repository.
• PS4: For more information check the summary or visit ClinGen Evidence Repository.
• PM2: For more information check the summary or visit ClinGen Evidence Repository.
• PP1: For more information check the summary or visit ClinGen Evidence Repository.
• PP3: 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.508+3delA		splice_region_variant, intron_variant	Intron 5 of 8	ENST00000675419.1	NP_001745.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RUNX1	ENST00000675419.1	c.508+3delA		splice_region_variant, intron_variant	Intron 5 of 8		NM_001754.5	ENSP00000501943.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:3

Revision: reviewed by expert panel

Submissions by phenotype

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

Dec 18, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change falls in intron 5 of the RUNX1 gene. It does not directly change the encoded amino acid sequence of the RUNX1 protein. RNA analysis indicates that this variant induces altered splicing and may result in an absent or altered protein product. This variant is not present in population databases (gnomAD no frequency). This variant has been observed in individual(s) with RUNX1-related conditions (PMID: 11830488). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 14466). Algorithms developed to predict the effect of variants on gene product structure and function are not available or were not evaluated for this variant. Experimental studies have shown that this variant affects RUNX1 function (PMID: 11830488). Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). Studies have shown that this variant results in activation of a cryptic splice site, and produces a non-functional protein and/or introduces a premature termination codon (PMID: 11830488). For these reasons, this variant has been classified as Pathogenic. -

Feb 15, 2002

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Hereditary thrombocytopenia and hematologic cancer predisposition syndrome Pathogenic:1

Sep 10, 2024

ClinGen Myeloid Malignancy Variant Curation Expert Panel

Significance: Pathogenic

Review Status: reviewed by expert panel

Collection Method: curation

There is RT-PCR assay evidence demonstrating that the NM_001754.4:c.508+3delA variant creates a cryptic splice donor site that is used and results in a frameshift and introduction of premature termination codon (PS3; PMID: 11830488). This variant was found to co-segregate with disease in multiple affected family members, with eight meioses observed in one family (PP1_Strong; PMID: 11830488). It is absent from all population databases with at least 20x coverage for RUNX1 (PM2_supporting). This intronic variant (in intron 5) is located in reference to the exon at positions +3 for donor splice site and has a predicted decrease in the score of the canonical splice site by at least 75% (measured by both MES and SSF). This variant has been reported in one proband meeting at least one of the RUNX1-phenotypic criteria (PS4_Supporting; PMID: 11830488). 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: PS3, PP1_Strong, PM2_supporting, PP3, PS4_Supporting. -

Computational scores

Source: dbNSFP v4.3

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.99		Details are displayed if max score is > 0.2
DS_DG_spliceai		0.54		Position offset: 27
DS_DL_spliceai		0.99		Position offset: 4

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

Publications

LitVar

Other links and lift over

dbSNP: rs587776810; hg19: chr21-36252850;