Novel role of cytoplasmic dynein motor in maintenance of the nuclear number in conidia through organized conidiation in Aspergillus oryzae.
Cytoplasmic dynein is a minus-end-directed, microtubule-dependent motor protein complex. DhcA, cytoplasmic dynein heavy chain in Aspergillus oryzae, contained four P-loops involved in ATP binding which were conserved as in cytoplasmic dynein heavy chains of other organisms. The amino acid sequence of A. oryzae DhcA was similar to cytoplasmic dynein heavy chains from other organisms except for the N-terminus of Saccharomyces cerevisiae Dyn1. Disruption of dhcA gene in the region encoding four P-loop motifs resulted in a defective growth and perturbed distribution of nuclei and vacuoles. The dhcA disruptant exhibited an abnormal morphology of conidial heads and conidia with an increased nuclear number. The present study implicates a novel role of cytoplasmic dynein in maintenance of the nuclear number in conidia through an organized conidiation.
Maruyama
Jun-ichi
J
Department of Biotechnology, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan.
Nakajima
Harushi
H
Kitamoto
Katsuhiko
K
D001236:Aspergillus oryzae / Q000166:cytology / Q000254:growth & development* / Q000648:ultrastructure; D002467:Cell Nucleus / Q000648:ultrastructure*; D003001:Cloning, Molecular; D004398:Dyneins / Q000235:genetics / Q000502:physiology*; D020409:Molecular Motor Proteins / Q000235:genetics / Q000502:physiology*; D009154:Mutation
D020409:Molecular Motor Proteins; D004398:Dyneins