rs754042987

Variant names:

• chr21-34892921-A-C
• rs754042987
• NM_001754.5:c.97+4T>G

Your query was ambiguous. Multiple possible variants found:

• chr21-34892921-A-C
• chr21-34892921-A-G
• chr21-34892921-A-T

Variant summary

Our verdict is Benign. Variant got -16 ACMG points: 0P and 16B. BP4_Strong BP6_Very_Strong BS2

The NM_001754.5(RUNX1):​c.97+4T>G variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000422 in 1,540,720 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely benign (★★★).

• Frequency:
  • Genomes: 𝑓 0.000033 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000043 (0 hom.)
• Consequence: RUNX1 NM_001754.5 splice_region, intron
• Scores: Splicing: ADA: 0.00008407
• Clinical Significance: Likely benign reviewed by expert panel U:1 B:2
• Conservation: PhyloP100: 0.644

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]

ACMG classification

Verdict is Benign. Variant got -16 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.81).
• BP6: Variant 21-34892921-A-C is Benign according to our data. Variant chr21-34892921-A-C is described in ClinVar as [Likely_benign]. Clinvar id is 339878.Status of the report is reviewed_by_expert_panel, 3 stars.
• BS2: High AC in GnomAd4 at 5 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RUNX1	NM_001754.5	c.97+4T>G		splice_region_variant, intron_variant	Intron 3 of 8	ENST00000675419.1	NP_001745.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RUNX1	ENST00000675419.1	c.97+4T>G		splice_region_variant, intron_variant	Intron 3 of 8		NM_001754.5	ENSP00000501943.1

Frequencies

GnomAD3 genomes AF: 0.0000328 AC: 5 AN: 152216 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000735

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000282 AC: 7 AN: 248526 Hom.: 0 AF XY: 0.0000223 AC XY: 3 AN XY: 134330

Gnomad AFR exome AF: 0.0000624

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000532

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000432 AC: 60 AN: 1388504 Hom.: 0 Cov.: 25 AF XY: 0.0000446 AC XY: 31 AN XY: 694908

Gnomad4 AFR exome AF: 0.0000313

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000255

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000554

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.0000328 AC: 5 AN: 152216 Hom.: 0 Cov.: 32 AF XY: 0.0000403 AC XY: 3 AN XY: 74354

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000735

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000580 Hom.: 0

Bravo AF: 0.0000416

ClinVar

Significance: Likely benign

Submissions summary: Uncertain:1 Benign:2

Revision: reviewed by expert panel

Submissions by phenotype

Hereditary thrombocytopenia and hematological cancer predisposition syndrome associated with RUNX1 Uncertain:1 Benign:1

Nov 03, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jun 14, 2016

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Hereditary thrombocytopenia and hematologic cancer predisposition syndrome Benign:1

Jan 15, 2025

ClinGen Myeloid Malignancy Variant Curation Expert Panel

Significance: Likely benign

Review Status: reviewed by expert panel

Collection Method: curation

The NM_001754.5(RUNX1):c.97+4T>G is an intronic variant. This intronic variant has a SpliceAI score ≤ 0.20 (0.02 donor gain; 0.01 acceptor gain) (BP4). This variant has a SpliceAI score ≤ 0.20 (0.02/0.01) and evolutionary conservation algorithms predict the site as not being conserved (PhyloP score ≤ 2.0 (0.640) (BP7). In summary, this variant meets criteria to be classified as likely benign. ACMG/AMP criteria applied, as specified by the Myeloid Malignancy Variant Curation Expert Panel for RUNX1: BP4, BP7. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.81
CADD	Benign	15
DANN	Benign	0.66

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.000084
dbscSNV1_RF	Benign	0.0020
SpliceAI score (max)		0.010		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: rs754042987; hg19: chr21-36265218;