chr15-78439782-A-AT

Position:

• chr15-78439782-A-AT

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP6_Moderate

The NM_004136.4(IREB2):​c.20-4dup variant causes a splice polypyrimidine tract, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00212 in 1,436,622 control chromosomes in the GnomAD database, including 1 homozygotes. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.00027 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0023 (1 hom.)
• Consequence: IREB2 NM_004136.4 splice_polypyrimidine_tract, intron
• Clinical Significance: Benign criteria provided, single submitter B:2
• Conservation: PhyloP100: -0.632

Genes affected

IREB2 (HGNC:6115): (iron responsive element binding protein 2) The protein encoded by this gene is an RNA-binding protein that acts to regulate iron levels in the cells by regulating the translation and stability of mRNAs that affect iron homeostasis under conditions when iron is depleted. When iron levels are low, this protein binds to iron-responsive elements (IRES), stem-loop structures located either in the 5' or 3' UTRs. Binding to the 5' UTR represses translation, while binding to the 3' UTR inhibits mRNA degradation. When iron is found in the cell, this protein is degraded in a F-box and leucine rich repeat protein 5-dependent manner. Variants in this gene have been associated with lung cancer and chronic obstructive pulmonary disease (COPD). Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Aug 2017]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP6: Variant 15-78439782-A-AT is Benign according to our data. Variant chr15-78439782-A-AT is described in ClinVar as [Benign]. Clinvar id is 3021263.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
IREB2	NM_004136.4	c.20-4dup		splice_polypyrimidine_tract_variant, intron_variant		ENST00000258886.13

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
IREB2	ENST00000258886.13	c.20-4dup		splice_polypyrimidine_tract_variant, intron_variant		1	NM_004136.4	P1

Frequencies

GnomAD3 genomes AF: 0.000271 AC: 41 AN: 151528 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.000510

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000208

Gnomad FIN AF: 0.00105

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000118

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.00234 AC: 3004 AN: 1285094 Hom.: 1 Cov.: 20 AF XY: 0.00222 AC XY: 1431 AN XY: 643180

Gnomad4 AFR exome AF: 0.00261

Gnomad4 AMR exome AF: 0.00146

Gnomad4 ASJ exome AF: 0.000708

Gnomad4 EAS exome AF: 0.00125

Gnomad4 SAS exome AF: 0.00189

Gnomad4 FIN exome AF: 0.00297

Gnomad4 NFE exome AF: 0.00247

Gnomad4 OTH exome AF: 0.00198

GnomAD4 genome AF: 0.000271 AC: 41 AN: 151528 Hom.: 0 Cov.: 32 AF XY: 0.000324 AC XY: 24 AN XY: 73992

Gnomad4 AFR AF: 0.000510

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000208

Gnomad4 FIN AF: 0.00105

Gnomad4 NFE AF: 0.000118

Gnomad4 OTH AF: 0.00

Bravo AF: 0.000204

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 02, 2024

- -

IREB2-related disorder Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Oct 30, 2019

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

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: rs533778908; hg19: chr15-78732124;