Platynereis head proteome - Combined transcriptome and proteome profiling reveals specific molecular brain signatures for sex, maturation and circalunar clock phase

ABSTRACT: A maturation, sex and lunar phase locked Platynereis head proteome was generated by sampling six heads per biological replicate from male and female Platynereis at defined stages of sexual maturation (immature, premature and mature) at two different moon phases; New moon and Free-running Full moon, meaning the animals would expect a nocturnal light stimulus, Full moon, which was not given. From these heads RNA and protein were extracted simultaneously and used for both transcriptomics (ENA accession no. PRJEB27496) and quantitative proteomics. In total 2290 proteins were identified with two unique peptides as requirement; of these, 1064 proteins were found to be quantifiable (identification in two out of three biological replicates and three out of five technical replicates). Relative quantification revealed that the majority of quantifiable proteins changed during maturation (693 out of 1064 proteins), sexual differences accounted for only 17 differentially expressed proteins, whereas lunar phase differences showed 261 differentially expressed proteins. This finding is in contrast to what was found on the transcriptome levels where differences in between the lunar phases only accounted for only 64 out of 52059 transcripts. To confirm this high degree of lunar regulated proteins a second proteome from immature animals at New moon and Free-running Full moon was undertaken. In this second set, we identified 2095 proteins of which 1671 were considered quantifiable. Of these 173 proteins showed significant differences between the New moon and the Free running full moon phase, thus confirming the previous results of a higher regulation on the protein compared to the transcript levels.

INSTRUMENT(S): Q Exactive

ORGANISM(S): Platynereis Dumerilii

SUBMITTER: Sven Schenk  

LAB HEAD: Florian Raible

PROVIDER: PXD010532 | Pride | 2019-02-19

REPOSITORIES: Pride