IBSP integrin binding sialoprotein [Homo sapiens (human)] - Gene

Summary

Official Symbol: IBSPprovided by HGNC
Official Full Name: integrin binding sialoproteinprovided by HGNC
Primary source: HGNC:HGNC:5341
See related: Ensembl:ENSG00000029559 MIM:147563; AllianceGenome:HGNC:5341
Gene type: protein coding
RefSeq status: REVIEWED
Organism: Homo sapiens
Lineage: Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo
Also known as: BSP; BNSP; SP-II; BSP-II
Summary: 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]
Expression: Low expression observed in reference dataset See more
Orthologs: mouse all
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Genomic context

Location:: 4q22.1

Exon count:: 7

Annotation release	Status	Assembly	Chr	Location
RS_2024_08	current	GRCh38.p14 (GCF_000001405.40)	4	NC_000004.12 (87799554..87812435)
RS_2024_08	current	T2T-CHM13v2.0 (GCF_009914755.1)	4	NC_060928.1 (91125985..91138857)
RS_2024_09	previous assembly	GRCh37.p13 (GCF_000001405.25)	4	NC_000004.11 (88720706..88733587)

Chromosome 4 - NC_000004.12 Genomic Context describing neighboring genes

Genomic regions, transcripts, and products

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Go to reference sequence details

Genomic Sequence:

Go to nucleotide: Graphics FASTA GenBank

Expression

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See details

Project title: HPA RNA-seq normal tissues
Description: RNA-seq was performed of tissue samples from 95 human individuals representing 27 different tissues in order to determine tissue-specificity of all protein-coding genes
BioProject: PRJEB4337
Publication: PMID 24309898
Analysis date: Wed Apr 4 07:08:55 2018

Bibliography

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GeneRIFs: Gene References Into Functions

What's a GeneRIF?

High expression of integrin-binding sialoprotein (IBSP) is associated with poor prognosis of osteosarcoma.
Title: High expression of integrin-binding sialoprotein (IBSP) is associated with poor prognosis of osteosarcoma.
Preservation of immunoexpression of type I collagen, BSP and BMP4 in the dentin-pulp complex of head and neck cancer patients after radiotherapy.
Title: Preservation of immunoexpression of type I collagen, BSP and BMP4 in the dentin-pulp complex of head and neck cancer patients after radiotherapy.
IBSP, a potential recurrence biomarker, promotes the progression of colorectal cancer via Fyn/beta-catenin signaling pathway.
Title: IBSP, a potential recurrence biomarker, promotes the progression of colorectal cancer via Fyn/β-catenin signaling pathway.
Serum levels of bone sialoprotein, osteopontin, and beta2-microglobulin in stage I of multiple myeloma.
Title: Serum levels of bone sialoprotein, osteopontin, and β2-microglobulin in stage I of multiple myeloma.
Study analyzed circulating bone sialoprotein (BSP) in a large cohort of patients with liver cirrhosis. Serum levels of BSP were similar in patients with different disease stages and were not indicative for prognosis. BSP serum levels did correlate inversely with portal pressure. BSP might represent a previously unrecognized marker for portal hypertension in patients with liver cirrhosis.
Title: Serum levels of bone sialoprotein correlate with portal pressure in patients with liver cirrhosis.
These data indicate that secretome derived from salivary gland cancer cells can influence the expression of two potential biomarkers of oral cancer-namely, bone sialoprotein (BSP) and dentin sialoprotein (DSP)-in normal salivary gland cells.
Title: Cancer Secretome May Influence BSP and DSP Expression in Human Salivary Gland Cells.
In conclusion, serum levels of BSP, ALP, ICTP, and PSA increased in patients with bone metastases, and combined detection of all markers could improve the positive-predictive value.
Title: Serum levels of PSA, ALP, ICTP, and BSP in prostate cancer patients and the significance of ROC curve in the diagnosis of prostate cancer bone metastases.
Preameloblast-Derived Factors Mediate Osteoblast Differentiation of Human Bone Marrow Mesenchymal Stem Cells by Runx2-Osterix-BSP Signaling.
Title: Preameloblast-Derived Factors Mediate Osteoblast Differentiation of Human Bone Marrow Mesenchymal Stem Cells by Runx2-Osterix-BSP Signaling.
Two significant SNPs within IBSP, rs1054627 and rs17013181, were associated with BMD and postmenopausal osteoporosis by the two-stage strategy, and rs17013181 was also significantly associated with serum IBSP levels.
Title: Endochondral ossification pathway genes and postmenopausal osteoporosis: Association and specific allele related serum bone sialoprotein levels in Han Chinese.
Our results suggest that SSEA-4 is a specific cell surface antigen that can be used to identify dental pulp stem cells.
Title: Stage-specific embryonic antigen-4 identifies human dental pulp stem cells.

Submit: New GeneRIF Correction See all GeneRIFs (41)

Phenotypes

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Find tests for this gene in the NIH Genetic Testing Registry (GTR)

Review eQTL and phenotype association data in this region using PheGenI

EBI GWAS Catalog

Description
Genome-wide association study using extreme truncate selection identifies novel genes affecting bone mineral density and fracture risk. EBI GWAS Catalog EBI GWAS CatalogPubMed
GWAS of dental caries patterns in the permanent dentition. EBI GWAS Catalog EBI GWAS CatalogPubMed

Variation

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See variants in ClinVar

See studies and variants in dbVar

See Variation Viewer (GRCh37.p13)

See Variation Viewer (GRCh38)

HIV-1 interactions

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Replication interactions

Interaction	Pubs
Knockdown of integrin-binding sialoprotein (IBSP) by shRNA library screening inhibits HIV-1 replication in cultured Jurkat T-cells	PubMed

Go to the HIV-1, Human Interaction Database

Interactions

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Products	Interactant	Other Gene	Complex	Source	Pubs	Description

General gene information

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Markers

STS-J05213 (e-PCR)
- UniSTS:82455

RH94127 (e-PCR)
- UniSTS:84552

IBSP__6436 (e-PCR)
- UniSTS:463992

SHGC-82974 (e-PCR)
- UniSTS:101260

SHGC-56508 (e-PCR)
- UniSTS:44491

RH71344 (e-PCR)
- UniSTS:3049

Gene Ontology Provided by GOA

Function	Evidence Code	Pubs
enables integrin binding	IMP Inferred from Mutant Phenotype more info	PubMed
enables protein binding	IPI Inferred from Physical Interaction more info	PubMed
enables small molecule binding	IPI Inferred from Physical Interaction more info	PubMed

Process	Evidence Code	Pubs
involved_in bone mineralization	IBA Inferred from Biological aspect of Ancestor more info
involved_in cell adhesion	ISS Inferred from Sequence or Structural Similarity more info
involved_in cellular response to growth factor stimulus	ISS Inferred from Sequence or Structural Similarity more info
involved_in extracellular matrix organization	IBA Inferred from Biological aspect of Ancestor more info
involved_in extracellular matrix organization	ISS Inferred from Sequence or Structural Similarity more info
involved_in osteoblast differentiation	HDA more info	PubMed
involved_in positive regulation of cell adhesion	IMP Inferred from Mutant Phenotype more info	PubMed

Component	Evidence Code	Pubs
located_in extracellular region	TAS Traceable Author Statement more info
located_in extracellular space	ISS Inferred from Sequence or Structural Similarity more info
located_in membrane	HDA more info	PubMed
located_in vesicle	ISS Inferred from Sequence or Structural Similarity more info

General protein information

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Preferred Names: integrin-binding sialoprotein

Names: BSP II; bone sialoprotein 2; bone sialoprotein II; cell-binding sialoprotein

NCBI Reference Sequences (RefSeq)

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RefSeqs maintained independently of Annotated Genomes

These reference sequences exist independently of genome builds. Explain

These reference sequences are curated independently of the genome annotation cycle, so their versions may not match the RefSeq versions in the current genome build. Identify version mismatches by comparing the version of the RefSeq in this section to the one reported in Genomic regions, transcripts, and products above.