chr21-44903030-C-T

Position:

• chr21-44903030-C-T

Variant summary

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

The NM_000211.5(ITGB2):​c.499+335G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.173 in 152,154 control chromosomes in the GnomAD database, including 2,494 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 0.17 (2494 hom., cov: 33)
• Consequence: ITGB2 NM_000211.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.64

Genes affected

ITGB2 (HGNC:6155): (integrin subunit beta 2) This gene encodes an integrin beta chain, which combines with multiple different alpha chains to form different integrin heterodimers. Integrins are integral cell-surface proteins that participate in cell adhesion as well as cell-surface mediated signalling. The encoded protein plays an important role in immune response and defects in this gene cause leukocyte adhesion deficiency. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2014]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.98).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.187 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ITGB2	NM_000211.5	c.499+335G>A		intron_variant		ENST00000652462.1	NP_000202.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ITGB2	ENST00000652462.1	c.499+335G>A		intron_variant			NM_000211.5	ENSP00000498780	P1

Frequencies

GnomAD3 genomes AF: 0.173 AC: 26251 AN: 152036 Hom.: 2496 Cov.: 33

Gnomad AFR AF: 0.191

Gnomad AMI AF: 0.189

Gnomad AMR AF: 0.139

Gnomad ASJ AF: 0.241

Gnomad EAS AF: 0.00135

Gnomad SAS AF: 0.136

Gnomad FIN AF: 0.177

Gnomad MID AF: 0.263

Gnomad NFE AF: 0.180

Gnomad OTH AF: 0.181

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

GnomAD4 genome AF: 0.173 AC: 26258 AN: 152154 Hom.: 2494 Cov.: 33 AF XY: 0.171 AC XY: 12684 AN XY: 74372

Gnomad4 AFR AF: 0.191

Gnomad4 AMR AF: 0.139

Gnomad4 ASJ AF: 0.241

Gnomad4 EAS AF: 0.00135

Gnomad4 SAS AF: 0.136

Gnomad4 FIN AF: 0.177

Gnomad4 NFE AF: 0.180

Gnomad4 OTH AF: 0.178

Alfa AF: 0.180 Hom.: 2610

Bravo AF: 0.172

Asia WGS AF: 0.0640 AC: 224 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.98
CADD	Benign	0.035
DANN	Benign	0.54

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: rs2838732; hg19: chr21-46322945;