rs2568491

Variant names:

• chr15-78446079-C-T
• rs2568491
• NM_004136.4:c.106+6198C>T

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_004136.4(IREB2):​c.106+6198C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0287 in 152,260 control chromosomes in the GnomAD database, including 221 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 0.029 (221 hom., cov: 32)
• Consequence: IREB2 NM_004136.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.29
• Publications: 2 publications found

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]

IREB2 Gene-Disease associations (from GenCC):

• neurodegeneration, early-onset, with choreoathetoid movements and microcytic anemia

  Inheritance: AR Classification: STRONG, MODERATE Submitted by: G2P, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-1.0).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0984 is higher than 0.05.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004136.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	IREB2	NM_004136.4	MANE Select	c.106+6198C>T		intron	N/A	NP_004127.2
	IREB2	NM_001320942.2		c.-66+6198C>T		intron	N/A	NP_001307871.2
	IREB2	NM_001354994.2		c.-66+6198C>T		intron	N/A	NP_001341923.2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	IREB2	ENST00000258886.13	TSL:1 MANE Select	c.106+6198C>T		intron	N/A	ENSP00000258886.8
	IREB2	ENST00000560440.5	TSL:1	c.106+6198C>T		intron	N/A	ENSP00000452938.1
	IREB2	ENST00000558570.5	TSL:1	n.106+6198C>T		intron	N/A	ENSP00000454063.1

Frequencies

GnomAD3 genomes AF: 0.0287 AC: 4361 AN: 152142 Hom.: 222 Cov.: 32

Gnomad AFR AF: 0.101

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00812

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00316

Gnomad NFE AF: 0.000206

Gnomad OTH AF: 0.0181

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

GnomAD4 genome AF: 0.0287 AC: 4367 AN: 152260 Hom.: 221 Cov.: 32 AF XY: 0.0268 AC XY: 1999 AN XY: 74460

African (AFR) AF: 0.101 AC: 4190 AN: 41522

American (AMR) AF: 0.00811 AC: 124 AN: 15288

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5184

South Asian (SAS) AF: 0.000207 AC: 1 AN: 4826

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10612

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.000206 AC: 14 AN: 68034

Other (OTH) AF: 0.0180 AC: 38 AN: 2116

Alfa AF: 0.0243 Hom.: 20

Bravo AF: 0.0330

Asia WGS AF: 0.00635 AC: 23 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-1.0
CADD	Benign	0.28
DANN	Benign	0.28
PhyloP100		-1.3
Mutation Taster		=100/0	polymorphism (auto)

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

Other links and lift over

dbSNP: rs2568491; hg19: chr15-78738421;