De-N-acetyllactotriaosylceramide as a novel cationic glycosphingolipid of bovine brain white matter: isolation and characterization.
Biochemistry
; 44(27): 9555-62, 2005 Jul 12.
Article
in En
| MEDLINE
| ID: mdl-15996110
ABSTRACT
A novel cationic lipid was separated from bovine brain white matter by a series of chromatographies on carboxymethyl-Sephadex and silica gel in chloroform and methanol. Its structure was identified unambiguously as de-N-acetyllactotriaosylceramide (deNAcLc(3)Cer) by mass spectrometry and (1)H NMR. The natural occurrence of this glycolipid in white matter extract was detected by immunostaining of thin-layer chromatography with monoclonal antibody 5F5, which is directed to deNAcLc(3)Cer and recognizes the terminal beta-glucosaminyl (GlcNH(2)) residue, having a free NH(2) group. A de-N-acetylase capable of hydrolyzing the N-acetyl group of Lc(3)Cer was detected in bovine brain extract using N-[(14)C]acetyl-labeled Lc(3)Cer as a substrate. The biogenesis and possible functional significance of deNAcLc(3)Cer are discussed.
Search on Google
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Brain
/
Glycosphingolipids
/
G(M3) Ganglioside
/
Lactosylceramides
Limits:
Animals
/
Humans
Language:
En
Journal:
Biochemistry
Year:
2005
Document type:
Article
Affiliation country: