Molecular cloning and expression of the ARFC3 gene, a component of the replication factor C from the salt-tolerant, dimorphic yeast Arxula adeninivorans LS3.
The yeast replication factor C (RF-C) is a multi-polypeptide complex with five sub-units involved in chromosomal DNA replication. This factor, encoded by five genes, is well characterized for the yeast Saccharomyces cerevisiae. However, RF-C components from other yeast species have not been analysed yet. Here we report the cloning and characterization of ARFC3 from the dimorphic and osmo-tolerant yeast Arxula adeninivorans. This gene encodes one subunit of the RF-C complex. It is localized on chromosome 1 of the four Arxula chromosomes and comprises a coding region of 1014 bp, which corresponds to 338 amino acids. Two introns are contained within this gene. The ARFC3 transcript level is influenced by both salt and temperature. The latter also influences the morphological state (budding cells, mycelium). High salt concentration and high temperature result in a rapid decrease of the ARFC3 mRNA.