Abstract:
:Erythroid band 4.1 enhances the binding of erythroid spectrin to phosphatidylserine vesicles under conditions of ionic strength and at protein concentrations similar to those in the red cell. The extent of enhancement depends on the concentration of band 4.1; at 2 microM 4.1, spectrin binding increases approximately 10-fold (to 600 mumoles/mole lipid). The Kd is 0.5 microM, as measured by SDS-PAGE of protein-bound vesicles recovered by ficoll gradient centrifugation. The 4.1-enhanced binding of spectrin was also measured by a gel filtration assay. The electrostatic nature of the enhancement of spectrin binding is indicated by its dependence on the phosphatidylserine content of the vesicles.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Takeshita K,MacDonald RI,MacDonald RCdoi
10.1006/bbrc.1993.1198subject
Has Abstractpub_date
1993-02-26 00:00:00pages
165-71issue
1eissn
0006-291Xissn
1090-2104pii
S0006-291X(83)71198-8journal_volume
191pub_type
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