Quantification of egg proteome changes during fertilization in sterlet Acipenser ruthenus

Hamid Niksirat, Liselotte Andersson, Amin Golpour, Latifeh Chupani, Peter James

Research output: Contribution to journalArticlepeer-review

Abstract

Eggs of sterlet are discharged outside into ambient aquatic environment where egg activation and fertilization occur. Effects of different activation media including freshwater and clay suspension on protein abundances of egg were quantified in sterlet Acipenser ruthenus. In-gel digestion and high resolution mass spectrometry were used for label-free protein quantification in the eggs of five females. No significant (p > 0.05) difference was found between protein abundances in eggs activated with different media. However, results showed significant (p < 0.05, fold change ≥2) reduction in the abundances of nine proteins including six glycoproteins, enolase and heat shock protein in activated groups compared to freshly ovulated eggs as control. The fact that abundance of proteasome subunit alpha significantly reduced only in eggs which were activated by clay suspension suggests that activation medium can somehow intervene with protein regulation during fertilization. In conclusion, external fertilization in sturgeon egg is accompanied by huge release of proteins into the external environment that may participate in the construction of a transient microenvironment around egg for attraction and protection of spermatozoa to ensure ensuing fertilization. Data are available via ProteomeXchange with identifier PXD006232.

Original languageEnglish
Pages (from-to)189-193
JournalBiochemical and Biophysical Research Communications
Volume490
Issue number2
Early online date2017 Jun 8
DOIs
Publication statusPublished - 2017 Aug

Subject classification (UKÄ)

  • Fish and Wildlife Management
  • Biochemistry and Molecular Biology

Free keywords

  • Egg
  • Fertilization
  • Label-free
  • Protein
  • Quantitative

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