chr15-78448622-G-A

Position:

• chr15-78448622-G-A

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_004136.4(IREB2):​c.106+8741G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.358 in 152,064 control chromosomes in the GnomAD database, including 10,112 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.36 (10112 hom., cov: 33)
• Consequence: IREB2 NM_004136.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.18

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 Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.435 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
IREB2	NM_004136.4	c.106+8741G>A		intron_variant		ENST00000258886.13

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
IREB2	ENST00000258886.13	c.106+8741G>A		intron_variant		1	NM_004136.4	P1

Frequencies

GnomAD3 genomes AF: 0.358 AC: 54366 AN: 151944 Hom.: 10105 Cov.: 33

Gnomad AFR AF: 0.441

Gnomad AMI AF: 0.371

Gnomad AMR AF: 0.308

Gnomad ASJ AF: 0.383

Gnomad EAS AF: 0.160

Gnomad SAS AF: 0.235

Gnomad FIN AF: 0.317

Gnomad MID AF: 0.424

Gnomad NFE AF: 0.347

Gnomad OTH AF: 0.348

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.358 AC: 54415 AN: 152064 Hom.: 10112 Cov.: 33 AF XY: 0.353 AC XY: 26222 AN XY: 74342

Gnomad4 AFR AF: 0.440

Gnomad4 AMR AF: 0.308

Gnomad4 ASJ AF: 0.383

Gnomad4 EAS AF: 0.161

Gnomad4 SAS AF: 0.237

Gnomad4 FIN AF: 0.317

Gnomad4 NFE AF: 0.347

Gnomad4 OTH AF: 0.345

Alfa AF: 0.350 Hom.: 9349

Bravo AF: 0.361

Asia WGS AF: 0.219 AC: 765 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
CADD	Benign	6.2
DANN	Benign	0.38

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: rs2568494; hg19: chr15-78740964;