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Updated: Dec 25, 2025
Purification of the Sarco-Endoplasmic Reticulum Ca2+-ATPase from Rabbit Muscle
Published on: March 21, 2025
An optimized procedure for isolation of rodent and human skeletal muscle sarcoplasmic and myofibrillar proteins
Michael D Roberts1,2, Kaelin C Young1,2, Carlton D Fox1
1School of Kinesiology, Auburn University, Auburn, AL 36849, USA.
Abstract:
Several published protocols exist for isolating contractile or myofibrillar (MF) proteins from skeletal muscle, however, achieving complete resuspension of the myofibril pellet can be technically challenging. We performed several previously published MF isolation methods with the intent of determining which method was most suitable for MF protein isolation and solubilization. Here, we provide an optimized protocol to isolate sarcoplasmic and solubilized MF protein fractions from mammalian skeletal muscle suitable for several downstream assays.
Insights
This study optimizes myofibril (MF) protein isolation from skeletal muscle. The new protocol enhances MF protein solubilization and isolation for better downstream analysis.
Area of Science:
- Muscle Physiology
- Protein Biochemistry
Background:
- Isolating myofibrillar (MF) proteins from skeletal muscle is crucial for biochemical analysis.
- Existing protocols often face challenges in complete myofibril pellet resuspension.
Purpose of the Study:
- To evaluate and optimize existing methods for skeletal muscle myofibril protein isolation.
- To develop a protocol for efficient isolation and solubilization of MF proteins.
Main Methods:
- Comparison of several published myofibril isolation protocols.
- Optimization of MF protein isolation and solubilization steps.
Main Results:
- Identified limitations in current MF isolation techniques.
- Developed an optimized protocol for isolating sarcoplasmic and solubilized MF protein fractions.
Conclusions:
- The optimized protocol facilitates improved isolation and solubilization of skeletal muscle MF proteins.
- This method is suitable for various downstream molecular assays.
