Abstract
AbstractWhen 125I‐β nerve growth factor binds to sympathetic and sensory neurons, some labeled ligand is sequestered (becomes inaccessible to the external milieu) in a time‐ and energy‐dependent manner. It would appear that the higher affinity receptor (type I) participates in this process to a greater extent than does the lower affinity receptor (type II) [Olender and Stach, 1980; Olender et al., 1981]. A small portion of the sequestered 125I‐β nerve growth factor is found as part of a high molecular weight complex. When cells, which have been incubated with 125I‐β nerve growth factor, are solubilized with Triton X‐100 and subjected to sodium dodecyl sulfate (SDS) polyacrylamide gel electrophoresis, a complex with an apparent molecular weight of approximately 240,000 is obtained. The formation of the covalent complex can be prevented by the prior addition of excess unlabeled β nerve growth factor or sodium fluoride and dinitrophenol. The covalent 125I‐β nerve growth factor‐receptor complex is dissociated in 50 mM dithiothreitol indicating that disulfide linkages are involved. At concentrations of β nerve growth factor (3.8 × 10−11 −3.8 × 10−10 M) where maximal fiber outgrowth occurs in vitro, approximately 50‐266 attomoles (0.3‐1.6% of the type I receptors) of the covalent complex are formed per 107 nerve cells. These data suggest that a small portion of the 125I‐β nerve growth sequestered by sympathetic neurons becomes covalently attached to its receptor subsequent to its sequestration in a manner which appears to involve type I receptors.
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Dates
Type | When |
---|---|
Created | 20 years, 8 months ago (Jan. 1, 2005, 12:29 a.m.) |
Deposited | 1 year, 10 months ago (Oct. 19, 2023, 5:55 p.m.) |
Indexed | 1 year, 10 months ago (Oct. 21, 2023, 4:05 p.m.) |
Issued | 41 years, 8 months ago (Jan. 1, 1984) |
Published | 41 years, 8 months ago (Jan. 1, 1984) |
Published Online | 20 years, 10 months ago (Oct. 11, 2004) |
Published Print | 41 years, 8 months ago (Jan. 1, 1984) |
@article{Stach_1984, title={Covalent attachment of 125I‐β nerve growth factor to its receptors on sympathetic neurons}, volume={11}, ISSN={1097-4547}, url={http://dx.doi.org/10.1002/jnr.490110302}, DOI={10.1002/jnr.490110302}, number={3}, journal={Journal of Neuroscience Research}, publisher={Wiley}, author={Stach, R. W. and Rusenko, K. W.}, year={1984}, month=jan, pages={215–229} }