4-87811421-G-A

Variant names:

• chr4-87811421-G-A
• rs140447227
• NM_004967.4:c.465G>A

Variant summary

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

The NM_004967.4(IBSP):​c.465G>A​(p.Glu155Glu) 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.

• Frequency: Genomes: not found (cov: 32)
• Consequence: IBSP NM_004967.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.35
• Publications: 0 publications found

Genes affected

IBSP (HGNC:5341): (integrin binding sialoprotein) The protein encoded by this gene is a major structural protein of the bone matrix. It constitutes approximately 12% of the noncollagenous proteins in human bone and is synthesized by skeletal-associated cell types, including hypertrophic chondrocytes, osteoblasts, osteocytes, and osteoclasts. The only extraskeletal site of its synthesis is the trophoblast. This protein binds to calcium and hydroxyapatite via its acidic amino acid clusters, and mediates cell attachment through an RGD sequence that recognizes the vitronectin receptor. [provided by RefSeq, Jul 2008]

ENSG00000307815 (HGNC:58843):

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=-0.64).
• BP7: Synonymous conserved (PhyloP=-1.35 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004967.4. 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
	IBSP	NM_004967.4	MANE Select	c.465G>A	p.Glu155Glu	synonymous	Exon 7 of 7	NP_004958.2	P21815

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	IBSP	ENST00000226284.7	TSL:1 MANE Select	c.465G>A	p.Glu155Glu	synonymous	Exon 7 of 7	ENSP00000226284.5	P21815
	IBSP	ENST00000883247.1		c.465G>A	p.Glu155Glu	synonymous	Exon 7 of 7	ENSP00000553306.1
	ENSG00000307815	ENST00000829020.1		n.286-24973C>T		intron	N/A

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 38

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.64
CADD	Benign	1.6
DANN	Benign	0.33
PhyloP100		-1.3

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: rs140447227; hg19: chr4-88732573; COSMIC: COSV99883564;