Abstract
We have analyzed the expression of the Dictyostelium gene P8A7 which had been isolated as a cDNA clone from an early developmentally regulated gene. The single genomic copy generated two mRNAs which were subject to different control mechanisms: while one mRNA (P8A7S) was regulated like the cell-type-nonspecific late genes, the other one (P8A7L) was induced during development, when cells were allowed to attach to a substrate, and when cells were subjected to stress, such as heat shock and cadmium. Interestingly the same induction was also observed with cold shock. RNA processing was inhibited by heat and cold shock, leading to nuclear accumulation of a precursor. The translated region of the cDNA was common to both mRNAs and encoded an unusually hydrophobic peptide with the characteristics of a membrane protein.
MeSH Terms
Amino Acid Sequence
Base Sequence
Cadmium/pharmacology
Cell Adhesion
Cell Aggregation
Cloning, Molecular
Cold Temperature
DNA/genetics
Dictyostelium/cytology,genetics,growth & development
Gene Expression Regulation
Heat-Shock Proteins/genetics
Hot Temperature
Membrane Proteins/genetics
Molecular Sequence Data
RNA Precursors/genetics
RNA, Messenger/genetics
Chemicals
Heat-Shock Proteins
Membrane Proteins
RNA Precursors
RNA, Messenger
Cadmium
DNA
Authors & Affiliations
2 authors, click to expand affiliations / ORCID
Maniak M
Max-Planck-Institut fuer Biochemie, Abteilung Zellbiologie, Martinsried, Federal Republic of Germany.
Nellen W
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