title: Visualization of nuclear localization of transcription factors with cyan and green fluorescent proteins in the red alga Porphyra yezoensis.
abstract: Transcription factors play a central role in expression of genomic information in all organisms. The objective of our study is to analyze the function of transcription factors in red algae. One way to analyze transcription factors in eukaryotic cells is to study their nuclear localization, as reported for land plants and green algae using fluorescent proteins. There is, however, no report documenting subcellular localization of transcription factors from red algae. In the present study, using the marine red alga Porphyra yezoensis, we confirmed for the first time successful expression of humanized fluorescent proteins (ZsGFP and ZsYFP) from a reef coral Zoanthus sp. and land plant-adapted sGFP(S65T) in gametophytic cells comparable to expression of AmCFP. Following molecular cloning and characterization of transcription factors DP-E2F-like 1 (PyDEL1), transcription elongation factor 1 (PyElf1) and multiprotein bridging factor 1 (PyMBF1), we then demonstrated that ZsGFP and AmCFP can be used to visualize nuclear localization of PyElf1 and PyMBF1. This is the first report to perform visualization of subcellular localization of transcription factors as genome-encoded proteins in red algae.
authors: Graduate School of Fisheries Sciences, Hokkaido University, Hakodate, 041-8611, Japan.
authors: Toshiki
authors: T
authors: Uji
authors: Megumu
authors: M
authors: Takahashi
authors: Naotsune
authors: N
authors: Saga
authors: Koji
authors: K
authors: Mikami
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D002467:Cell Nucleus / Q000648:ultrastructure*; D003001:Cloning, Molecular; D017931:DNA Primers / Q000235:genetics; D049452:Green Fluorescent Proteins / Q000378:metabolism; D008969:Molecular Sequence Data; D009687:Nuclear Proteins / Q000235:genetics / Q000378:metabolism*; D044664:Porphyra / Q000235:genetics / Q000378:metabolism / Q000648:ultrastructure*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism*
chemical_list: C485182:Cyan Fluorescent Protein; D017931:DNA Primers; D009687:Nuclear Proteins; D014157:Transcription Factors; D049452:Green Fluorescent Proteins