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?-Galactoside soluble lectin from human brain: complete amino acid sequence
D Bladier1, J P Le Caer, R Joubert
1Laboratoire de Biochimie et Technologie des Protéines, U.F.R. Santé Médecine et Biologie Humaine, 74, rue Marcel Cachin, F-93012 Bobigny Cedex, France.
Neurochemistry International
|May 28, 2010
Summary
Human brain lectin, which binds to specific sugar structures, shows complete sequence identity to the placenta lectin. This suggests a single gene encodes this important protein in humans.
Area of Science:
- Biochemistry
- Molecular Biology
- Glycobiology
Background:
- Soluble lectins play crucial roles in biological recognition.
- Specific lectins are involved in cellular interactions and signaling pathways.
- Understanding lectin structure and function is vital for deciphering biological processes.
Purpose of the Study:
- To sequence a soluble lectin from human brain.
- To compare the human brain lectin sequence with its counterpart from human placenta.
- To investigate the genetic basis of this lectin in humans and other mammals.
Main Methods:
- Peptide analysis following chemical and proteolytic cleavage.
- Amino acid sequencing of purified lectin.
- Comparative sequence analysis between brain and placenta lectins.
Main Results:
- The soluble lectin from human brain was successfully sequenced.
- The brain lectin sequence exhibited complete homology with the human placenta lectin.
- This high degree of similarity was also observed in related mammalian proteins.
Conclusions:
- The human brain and placenta soluble lectins are identical proteins.
- A single gene likely encodes this lectin within the human genome.
- Conserved gene structure across mammals suggests evolutionary importance of this lectin.
