PMID: 708756Sep 26, 1978Paper

Interaction studies of the 165 000 dalton protein component of the M-line with the S2 subfragment of myosin

Biochimica Et Biophysica Acta
R S Mani, C M Kay

Abstract

The M-line protein component of molecular weight 165 000 was isolated and purified from rabbit skeletal muscle using ion exchange chromatography. Sodium dodecyl sulphate electrophoresis revealed that the protein was homogeneous. Circular dichroism measurements indicated that the protein interacts with myosin and heavy meromyosin subfragment 2 (S2). There was an increase in negative ellipticity at 221 nm upon interaction, relative to the calculated values assuming no interprotein interaction. The net increaes in negative ellipticity at 221 nm as a result of interaction of M-protein with myosin and subfragment 2 were 600 degrees and 800 degrees respectively. When the protein was mixed with subfragment 2 in a 1 : 1 mol ratio in 0.5 M KCl/25 mM Tris buffer at pH 8.0, low speed sedimentation equilibrium studies gave a molecular weight of 235 000 +/- 10 000 for the complex, indicative of an interaction of the two components. On a Bio gel A 0.5 m column, M-protein and S2 when applied in 1 : 1 mol ratio, were eluted as a single symmetrical peak and a molecular weight of 230 000 was obtained for the complex from the observed elution volume. Both circular dichroism and sedimentation equilibrium studies indicated no interaction of M-line ...Continue Reading

References

Mar 1, 1973·Proceedings of the National Academy of Sciences of the United States of America·D C TurnerH M Eppenberger

Citations

Jul 9, 1999·Reviews of Physiology, Biochemistry and Pharmacology·D O FürstP F van der Ven
Jan 1, 1981·Proceedings of the National Academy of Sciences of the United States of America·C W HeizmanA Olomucki
Sep 1, 1980·The Journal of Cell Biology·E E StrehlerH M Eppenberger
May 1, 1981·The Journal of Cell Biology·H M EppenbergerE E Strehler
Feb 1, 1984·The Journal of Cell Biology·B K GroveH M Eppenberger
May 1, 1984·Muscle & Nerve·M E EppenbergerH M Eppenberger
Nov 1, 1981·Muscle & Nerve·T ObinataS Ebashi
Apr 1, 1981·Circulation Research·P AnversaA V Loud
Aug 9, 1996·The Journal of Biological Chemistry·S BantleJ C Perriard
Jan 1, 1985·Critical Reviews in Food Science and Nutrition·A AsgharT Yasui

Related Concepts

Metazoa
Circular Dichroism, Vibrational
Muscle Proteins
Actomyosin Adenosinetriphosphatase
Peptide Fragments
Plasma Protein Binding Capacity
Protein Conformation
Chinchilla Rabbits
Spectrophotometry, Ultraviolet

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