Affinity chromatography of heavy meromyosin subfragment-1 reacted with thiol reagents

Raphael Lamed*, Avraham Oplatka, Emil Reisler

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Separation of heavy meromyosin subfragment-1 treated with N-ethyl maleimide (Ma1NEt) into native -SH1- and - (SH1,SH2)-blocked protein populations could be achieved by affinity chromatography on agarose-ATP columns in the presence of Mg2+ or Ca2+. Covalent bridging of the two -SH groups by p-phenylenedimaleimide gave a product which has the same affinity of binding to ATP columns as the doubly blocked Ma1NEt preparation. Treatment with p-phenylenedimaleimide abolished binding to immobilized F-actin columns, whereas modifications by Ma1NEt did not affect adsorption by this chromatographic medium. Affinity chromatography on immobilized nucleotide and actin columns is suggested as an analytical tool in the study of the involvement of thiol groups in the myosin active site and its conformation.

Original languageEnglish
Pages (from-to)688-695
Number of pages8
JournalBBA - Protein Structure
Issue number2
StatePublished - 14 Apr 1976
Externally publishedYes


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