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Protein Page:
SPARC (human)

SPARC Appears to regulate cell growth through interactions with the extracellular matrix and cytokines. Binds calcium and copper, several types of collagen, albumin, thrombospondin, PDGF and cell membranes. There are two calcium binding sites; an acidic domain that binds 5 to 8 Ca(2+) with a low affinity and an EF-hand loop that binds a Ca(2+) ion with a high affinity. Belongs to the SPARC family. Note: This description may include information from UniProtKB.
Protein type: Secreted, signal peptide; Secreted
Chromosomal Location of Human Ortholog: 5q31.3-q32
Cellular Component: extracellular space; platelet alpha granule membrane; cell surface; nuclear matrix; mitochondrion; cytoplasm; extracellular region; plasma membrane; basement membrane
Molecular Function: collagen binding; protein binding; extracellular matrix binding; calcium ion binding
Biological Process: receptor-mediated endocytosis; response to gravity; platelet activation; response to peptide hormone stimulus; extracellular matrix organization and biogenesis; ossification; response to cAMP; heart development; response to glucocorticoid stimulus; response to lipopolysaccharide; signal transduction; response to L-ascorbic acid; negative regulation of angiogenesis; platelet degranulation; response to ethanol; response to cadmium ion; response to cytokine stimulus; response to lead ion; negative regulation of endothelial cell proliferation; regulation of cell morphogenesis; response to calcium ion; blood coagulation; inner ear development; lung development
Disease: Osteogenesis Imperfecta, Type Xvii
Reference #:  P09486 (UniProtKB)
Alt. Names/Synonyms: Basement-membrane protein 40; BM-40; cysteine-rich protein; ON; Osteonectin; Secreted protein acidic and rich in cysteine; secreted protein, acidic, cysteine-rich (osteonectin); SPARC; SPRC
Gene Symbols: SPARC
Molecular weight: 34,632 Da
Basal Isoelectric point: 4.73  Predict pI for various phosphorylation states
Protein-Specific Antibodies or siRNAs from Cell Signaling Technology® Total Proteins
Select Structure to View Below


Protein Structure Not Found.

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Modification Sites and Domains  

Modification Sites in Parent Protein, Orthologs, and Isoforms  

Show Multiple Sequence Alignment


LTP: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.


HTP: The number of records in which this modification site was assigned using ONLY proteomic discovery-mode mass spectrometry.



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