Structural characteristics of heparin-line domain required for interaction of midkine with embryonic neurons.
Midkine is a heparin binding growth/differentiation factor with neurite promoting activity. We examined inhibitory activities of various heparin derivatives toward interaction of midkine with neurons and elucidated the structural requirements of the heparin-like domain necessary for the interaction. All of the three sulfate groups in the heparin disaccharide unit (6-O-sulfate, 2-O-sulfate and N-sulfate) were necessary for full inhibitory activity. Among these, the N-sulfate group was critically important. The minimum size with inhibitory activity was approximately 7,000 Da. Thus, the highly sulfated region in cell surface heparan sulfate proteoglycan is required for neurons to interact with midkine.
Kaneda
N
N
Department of Biochemistry, Nagoya University School of Medicine, Japan.
Talukder
A H
AH
Ishihara
M
M
Hara
S
S
Yoshida
K
K
Muramatsu
T
T
D000818:Animals; D001665:Binding Sites; D002352:Carrier Proteins / Q000737:chemistry* / Q000378:metabolism / Q000494:pharmacology*; D002448:Cell Adhesion / Q000187:drug effects; D002478:Cells, Cultured; D016207:Cytokines; D006493:Heparin / Q000737:chemistry* / Q000378:metabolism / Q000494:pharmacology*; D006497:Heparan Sulfate / Q000737:chemistry; D051379:Mice; D000078792:Midkine; D015394:Molecular Structure; D008970:Molecular Weight; D009474:Neurons / Q000166:cytology / Q000187:drug effects / Q000378:metabolism; D051381:Rats; D011994:Recombinant Proteins / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology; D013329:Structure-Activity Relationship; D013431:Sulfates / Q000737:chemistry
D002352:Carrier Proteins; D016207:Cytokines; D006493:Heparin; D006497:Heparan Sulfate; D000078792:Midkine; D011994:Recombinant Proteins; D013431:Sulfates