Linked Life Data

7931296

Source:http://linkedlifedata.com/resource/pubmed/id/7931296

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1994-11-1
pubmed:abstractText
The hydrophilic, salt-soluble (SS) form of acetylcholinesterase (AChE) from bovine brain caudate nucleus exists mainly as a tetramer sedimenting at 10.3S (approximately 40%), and a monomer sedimenting at 3.4S (approximately 60%). The enzyme is N-glycosylated and contains similar HNK-1 carbohydrates as detergent-soluble (DS) AChE. No O-linked carbohydrates could be detected. Amino acid sequencing showed that the N terminus of SS-AChE is identical to that of DS-AChE. In tetrameric SS-AChE, two pairs of disulfide-linked dimers are associated by hydrophobic forces located in the C terminus. Antibodies were raised against a peptide identical to the last 10 amino acid residues of bovine brain DS-AChE. The peptide included the sequence of residues 574-583 (H-Tyr-Ser-Lys-Gln-Asp-Arg-Cys-Ser- Asp-Leu-OH) of the enzyme. The antibodies cross-reacted with tetrameric, but not with monomeric, SS-AChE, showing that in the latter form, the C terminus is truncated. Limited proteolysis of tetrameric SS-AChE at the C terminus led to the formation of an enzymatically active monomer, which did not react with anti-C-terminal antibody. Although the DS form of AChE contains a structural subunit that serves as membrane anchor, no anchor was detected in SS-AChE. Enzyme antigen immunoassays showed that SS-AChE reacted with all monoclonal antibodies directed against the catalytic subunit of DS-AChE, but not with monoclonal antibodies targeting the membrane-anchored subunits. From our results, we conclude that SS-AChE utilizes the same alternative splicing pattern as DS-AChE, leading to tetrameric SS-AChE devoid of the membrane anchor.(ABSTRACT TRUNCATED AT 250 WORDS)
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0022-3042
pubmed:author
pubmed:issnType
Print
pubmed:volume
63
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1446-53
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1994
pubmed:articleTitle
Characterization of salt-soluble forms of acetylcholinesterase from bovine brain.
pubmed:affiliation
Institute of Biochemistry and Molecular Biology, University of Bern, Switzerland.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't