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Published online 7 August 2000. doi:10.1083/jcb.150.3.681
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© The Rockefeller University Press, 0021-9525/2000//681 $5.00
The Journal of Cell Biology, Volume 150, Number 3, , 2000 681-688

Report

The Lis1-Related Nudf Protein of Aspergillus nidulans Interacts with the Coiled-Coil Domain of the Nude/Ro11 Protein



Vladimir P. Efimova and N. Ronald Morrisa

a University of Medicine and Dentistry or New Jersey, Robert Wood Johnson Medical School, Department of Pharmacology, 675 Hoes Lane, Piscataway, New Jersey 08854-5635
UMDNJ-Robert Wood Johnson Medical School, Department of Pharmacology, 675 Hoes Lane, Piscataway, NJ 08854-5635.(732) 235-4073(732) 235-4081

morrisnr{at}umdnj.edu

The nudF gene of the filamentous fungus Aspergillus nidulans acts in the cytoplasmic dynein/dynactin pathway and is required for distribution of nuclei. NUDF protein, the product of the nudF gene, displays 42% sequence identity with the human protein LIS1 required for neuronal migration. Haploinsufficiency of the LIS1 gene causes a malformation of the human brain known as lissencephaly. We screened for multicopy suppressors of a mutation in the nudF gene. The product of the nudE gene isolated in the screen, NUDE, is a homologue of the nuclear distribution protein RO11 of Neurospora crassa. The highly conserved NH2-terminal coiled-coil domain of the NUDE protein suffices for protein function when overexpressed. A similar coiled-coil domain is present in several putative human proteins and in the mitotic phosphoprotein 43 (MP43) of X. laevis. NUDF protein interacts with the Aspergillus NUDE coiled-coil in a yeast two-hybrid system, while human LIS1 interacts with the human homologue of the NUDE/RO11 coiled-coil and also the Xenopus MP43 coiled-coil. In addition, NUDF coprecipitates with an epitope-tagged NUDE. The fact that NUDF and LIS1 interact with the same protein domain strengthens the notion that these two proteins are functionally related.

Key Words: dynein • dynactin • lissencephaly • nudF • LIS1

© 2000 The Rockefeller University Press

Abbreviations used in this paper: CDHC, cytoplasmic dynein heavy chain, GFP, green fluorescent protein; nud, nuclear distribution defective; ts, temperature sensitive; VSV-G, Vesicular Stomatitis Virus Glycoprotein.


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