Troponin isoform dependent pH dependence of the Ca2+-activated myofibrillar atpase activity of avian slow and fast skeletal muscles

Akira Kawashima, Sachio Morimoto, Akito Suzuki, Fumie Shiraishi, Iwao Ohtsuki

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The effects of acidic pH were examined on the Ca2+-sensitive ATPase activity of chicken fast and slow skeletal muscle myofibrils. In both types of myofibrils the Ca2+-sensitivity declined on decreasing pH from 7.4 to 6.2, but the slow skeletal muscle myofibrils were found to exhibit a Ca2+-sensitive ATPase activity which was more resistant to acidic pH compared to the fast skeletal muscle myofibrils. The results obtained by using a novel method for replacing whole troponin complex in myofibrils provide the first evidence that troponin is responsible for this higher resistibility of slow skeletal muscle myofibrils to acidosis.

Original languageEnglish
Pages (from-to)585-592
Number of pages8
JournalBiochemical and Biophysical Research Communications
Volume207
Issue number2
DOIs
Publication statusPublished - Jan 1 1995

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Troponin
Myofibrils
Adenosine Triphosphatases
Muscle
Protein Isoforms
Skeletal Muscle
Calcium-Transporting ATPases
Acidosis
Chickens

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

Cite this

Troponin isoform dependent pH dependence of the Ca2+-activated myofibrillar atpase activity of avian slow and fast skeletal muscles. / Kawashima, Akira; Morimoto, Sachio; Suzuki, Akito; Shiraishi, Fumie; Ohtsuki, Iwao.

In: Biochemical and Biophysical Research Communications, Vol. 207, No. 2, 01.01.1995, p. 585-592.

Research output: Contribution to journalArticle

Kawashima, Akira ; Morimoto, Sachio ; Suzuki, Akito ; Shiraishi, Fumie ; Ohtsuki, Iwao. / Troponin isoform dependent pH dependence of the Ca2+-activated myofibrillar atpase activity of avian slow and fast skeletal muscles. In: Biochemical and Biophysical Research Communications. 1995 ; Vol. 207, No. 2. pp. 585-592.
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