What question did this study set out to answer?

June 1, 1982Biochemical JournalOpen Access

Isolation of two myosin light-chain kinases from bovine carotid artery and their regulation by phosphorylation mediated by cyclic AMP-dependent protein kinase

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Population

Bovine carotid artery

Comparison

Phosphorylation by cyclic AMP-dependent protein… vs Presence vs. absence of bound calmodulin

Design

Preclinical

Authors

RBRamesh C. BhallaUniversity of Iowa RSRam V. SharmaInstitute of Management Technology RGRamesh C. GuptaHenry Ford Hospital

Discussion

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Implication

May inform cAMP-mediated vascular relaxation mechanisms; leaves open translation beyond animal models.

Key Points

This research aims to isolate and characterize myosin light-chain kinases from bovine carotid artery and study their phosphorylation regulation.
Myosin light-chain kinase was purified from bovine carotid artery using EDTA buffer and DEAE-Sephacel chromatography.
Affinity chromatography with calmodulin-Sepharose was employed for further purification.
Phosphate incorporation by cyclic AMP-dependent protein kinase was assessed under varying calmodulin conditions.
Type I and II myosin kinases achieved purification levels of 960-fold and 650-fold respectively.
Phosphorylation without calmodulin increased phosphate incorporation leading to decreased kinase activity.
Cyclic AMP-dependent phosphorylation suggests a mechanism for beta-adrenergic-mediated vascular smooth muscle relaxation.

Structured PICO

Population

Bovine carotid artery

Intervention

Phosphorylation by cyclic AMP-dependent protein kinase

Comparator

Presence vs. absence of bound calmodulin

Outcome

Myosin kinase activity and calmodulin requirement for half-maximal stimulationsurrogate

Cyclic AMP-dependent phosphorylation decreases myosin kinase activity by increasing its calmodulin requirement, suggesting a mechanism for beta-adrenergic-mediated vascular smooth muscle relaxation.

Cite This Study

Bhalla et al. (1982) studied this question.

synapsesocial.com/papers/6a208eecb15f64b498301f66 https://doi.org/10.1042/bj2030583

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Isolation of two myosin light-chain kinases from bovine carotid artery and their regulation by phosphorylation mediated by cyclic AMP-dependent protein kinase

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Isolation of two myosin light-chain kinases from bovine carotid artery and their regulation by phosphorylation mediated by cyclic AMP-dependent protein kinase

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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