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.
journal_name
Biochemistryjournal_title
Biochemistryauthors
Hikita T,Tadano-Aritomi K,Iida-Tanaka N,Ishizuka I,Hakomori Sdoi
10.1021/bi0504411subject
Has Abstractpub_date
2005-07-12 00:00:00pages
9555-62issue
27eissn
0006-2960issn
1520-4995journal_volume
44pub_type
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