Linked Life Data

1373291

Source:http://linkedlifedata.com/resource/pubmed/id/1373291

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1992-5-15
pubmed:abstractText
We have studied the microtubule-associated protein MAP2 from porcine brain and its subfragments by limited proteolysis, antibody labeling, and electron microscopy. Two major chymotryptic fragments start at lys 1528 and arg 1664, generating microtubule-binding fragments of Mr 36 kDa (303 residues, analogous to the "assembly domain" of Vallee, 1980) and 18 kDa (167 residues). These fragments can be labeled with the antibody 2-4 which recognizes the last internal repeat of MAP2 (Dingus et al., 1991). The epitope of another monoclonal antibody, AP18 (Binder et al., 1986), was mapped to the first 151 residues of MAP2. The interaction with AP18 is phosphorylation dependent; dephosphorylated MAP2 is not recognized. Intact MAP2 forms rod-like particles of 97 nm mean length, similar to Gottlieb and Murphy's (1985) observations. Both antibodies bind near an end of the rod, suggesting that the sequence and the structure are approximately colinear. There is a pronounced tendency for MAP2 to form dimers whose components are nearly in register but of opposite polarity. MAP2 can also fold in a hairpin-like fashion, generating 50-nm rods, and it can self-associate into oligomers and fibers. The 36-kDa microtubule-binding fragment also has a rod-like shape; its mean length is 49 nm, half of the intact molecule, even though the fragment contains only one-sixth of the mass. The antibody 2-4 decorates one end of the rod, similar to the intact protein. The fragment also forms antiparallel dimers, but its tendency for higher self-assembly forms is much lower than with intact MAP2.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
1047-8477
pubmed:author
pubmed:issnType
Print
pubmed:volume
108
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
49-61
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:articleTitle
Domain structure and antiparallel dimers of microtubule-associated protein 2 (MAP2).
pubmed:affiliation
Max-Planck-Unit for Structural Molecular Biology, Hamburg, Germany.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't