21-44924735-A-G

Position:

• chr21-44924735-A-G

Variant summary

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

The NM_001127491.3(ITGB2):​c.-4+3919T>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.578 in 152,080 control chromosomes in the GnomAD database, including 27,974 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 0.58 (27974 hom., cov: 32)
• Consequence: ITGB2 NM_001127491.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -2.53

Genes affected

ITGB2-AS1 (HGNC:44304): (ITGB2 antisense RNA 1)

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=-0.97).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.856 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ITGB2	NM_001127491.3	c.-4+3919T>C		intron_variant			NP_001120963.2
ITGB2-AS1	NR_038311.1	n.388+1752A>G		intron_variant
ITGB2-AS1	NR_038312.1	n.388+1752A>G		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ITGB2-AS1	ENST00000441379.5	n.278-2133A>G		intron_variant		1
ITGB2	ENST00000355153.8	c.-4+3919T>C		intron_variant		2		ENSP00000347279.4
ITGB2	ENST00000397850.6	c.-233-3685T>C		intron_variant		5		ENSP00000380948.2

Frequencies

GnomAD3 genomes AF: 0.577 AC: 87729 AN: 151962 Hom.: 27914 Cov.: 32

Gnomad AFR AF: 0.863

Gnomad AMI AF: 0.582

Gnomad AMR AF: 0.564

Gnomad ASJ AF: 0.508

Gnomad EAS AF: 0.434

Gnomad SAS AF: 0.389

Gnomad FIN AF: 0.436

Gnomad MID AF: 0.601

Gnomad NFE AF: 0.457

Gnomad OTH AF: 0.551

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

GnomAD4 genome AF: 0.578 AC: 87860 AN: 152080 Hom.: 27974 Cov.: 32 AF XY: 0.573 AC XY: 42560 AN XY: 74318

Gnomad4 AFR AF: 0.863

Gnomad4 AMR AF: 0.564

Gnomad4 ASJ AF: 0.508

Gnomad4 EAS AF: 0.436

Gnomad4 SAS AF: 0.388

Gnomad4 FIN AF: 0.436

Gnomad4 NFE AF: 0.457

Gnomad4 OTH AF: 0.552

Alfa AF: 0.459 Hom.: 3072

Bravo AF: 0.607

Asia WGS AF: 0.451 AC: 1570 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.97
CADD	Benign	1.2
DANN	Benign	0.28

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs2838739; hg19: chr21-46344650;