Validation of the flooding dose technique to determine fractional rates of protein synthesis in a model bivalve species, the blue mussel (Mytilus edulis L.)

Author(s)

McCarthy, Ian D. ^{[1, 2]} ; Nicholls, Ruth ^[2] ; Malham, Shelagh K. ^[2] ; Whiteley, Nia M. ^[3]

Affiliation

^[1] Univ Sao Paulo, Inst Oceanog, Lab Manejo Ecol & Conservacao Marinha, BR-05508120 Sao Paulo, SP - Brazil

^[2] Bangor Univ, Coll Nat Sci, Sch Ocean Sci, Menai Bridge LL59 5AB, Anglesey - Wales

^[3] Bangor Univ, Coll Nat Sci, Sch Biol Sci, Bangor LL57 2UW, Gwynedd - Wales

• Document type: Journal article
• Source: COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR & INTEGRATIVE PHYSIOLOGY; v. 191, p. 166-173, JAN 2016.
• Web of Science Citations: 1

Abstract

For the first time, use of the flooding dose technique using H-3-Phenylalanine is validated for measuring whole-animal and tissue-specific rates of protein synthesis in the blue mussel Mytilus edulis (61 mm shell length; 4.0 g fresh body mass). Following injection, the phenylalanine-specific radioactivities in the gill, mantle and whole-animal free pools were elevated within one hour and remained elevated and stable for up to 6 h following injection of H-3-phenylalanine into the posterior adductor muscle. Incorporation of 3H-phenylalanine into body protein was linear over time following injection and the non-significant intercepts for the regressions suggested incorporation into body protein occurred rapidly after injection. These results validate the technique for measuring rates of protein synthesis in mussels. There were no differences in the calculated rates following 1-6 h incubation in gill, mantle or whole-animal and fractional rates of protein synthesis from the combined time course data were 9.5 +/- 0.8% d(-1) for the gill, 2.5 +/- 0.3% d(-1) for the mantle and 2.6 +/- 0.3% d(-1) for the whole-animal, respectively (mean values SEM). The whole-animal absolute rate of protein synthesis was calculated as 18.9 +/- 0.6 mg protein day(-1). The use of this technique in measuring one of the major components of maintenance metabolism and growth will provide a valuable and convenient tool in furthering our understanding of the protein metabolism and energetics of this keystone marine invertebrate and its ability to adjust and respond to fluctuations, such as that expected as a result of climate change. (c) 2015 Elsevier Inc. All rights reserved. (AU)

• FAPESP's process: 14/21804-3 - Integrating consistent individual differences theory into ecological and evolutionary studies related to global and local environmental change
• Grantee: Alexander Turra
• Support Opportunities: Research Grants - Visiting Researcher Grant - International