21-44900398-C-G

Variant names:

• chr21-44900398-C-G
• rs2230528
• NM_000211.5:c.819G>C
• ITGB2 p.Gly273Gly

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_000211.5(ITGB2):​c.819G>C​(p.Gly273Gly) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. G273G) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: ITGB2 NM_000211.5 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.509
• Publications: 24 publications found

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]

ITGB2 Gene-Disease associations (from GenCC):

• leukocyte adhesion deficiency 1

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), Ambry Genetics, Laboratory for Molecular Medicine

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.49).
• BP7: Synonymous conserved (PhyloP=0.509 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000211.5. 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
	ITGB2	NM_000211.5	MANE Select	c.819G>C	p.Gly273Gly	synonymous	Exon 7 of 16	NP_000202.3	P05107
	ITGB2	NM_001127491.3		c.819G>C	p.Gly273Gly	synonymous	Exon 7 of 16	NP_001120963.2	P05107
	ITGB2	NM_001303238.2		c.612G>C	p.Gly204Gly	synonymous	Exon 7 of 16	NP_001290167.1	B4E0R1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ITGB2	ENST00000652462.1	MANE Select	c.819G>C	p.Gly273Gly	synonymous	Exon 7 of 16	ENSP00000498780.1	A0A494C0X7
	ITGB2	ENST00000302347.10	TSL:1	c.819G>C	p.Gly273Gly	synonymous	Exon 7 of 17	ENSP00000303242.6	A0AAA9WZN5
	ITGB2	ENST00000397852.5	TSL:1	c.819G>C	p.Gly273Gly	synonymous	Exon 6 of 15	ENSP00000380950.1	P05107

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 38

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.49
CADD	Benign	5.7
DANN	Benign	0.49
PhyloP100		0.51

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs2230528;

hg19: chr21-46320313;