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Related Experiment Videos

The primary structure of a cell-binding bone sialoprotein.

A Oldberg1, A Franzén, D Heinegård

  • 1Department of Physiological Chemistry, University of Lund, Sweden.

The Journal of Biological Chemistry
|December 25, 1988
PubMed
Summary

Researchers determined the amino acid sequence of rat bone sialoprotein (BSP), a protein predominantly found in bone tissue. This sequence reveals key structural features, including an Arg-Gly-Asp motif, suggesting its role in cell binding.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cell Biology

Background:

  • Bone sialoprotein (BSP) is a non-collagenous matrix protein found in bone.
  • Its specific function and structural characteristics were not fully elucidated.

Purpose of the Study:

  • To determine the complete amino acid sequence of rat bone sialoprotein (BSP).
  • To identify key structural motifs and understand the protein's tissue-specific expression.

Main Methods:

  • Deduced amino acid sequence from a 1974-base pair cDNA.
  • Analyzed protein composition, molecular mass, and residue distribution.
  • Examined tissue distribution of BSP mRNA.

Main Results:

  • The mature BSP protein consists of 320 residues with a molecular mass of 33,600 Da.

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  • Predominantly composed of glutamic acid and glycine residues (32%).
  • Identified an Arg-Gly-Asp sequence, known for mediating cell adhesion.

    • Conclusions:

    • The determined sequence provides insights into BSP's structure and function.
    • BSP is likely a unique product of bone cells.
    • The Arg-Gly-Asp sequence suggests a role in cell binding properties of BSP.