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PMID:9166402

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Citation

Lenz-Böhme, B, Wismar, J, Fuchs, S, Reifegerste, R, Buchner, E, Betz, H and Schmitt, B (1997) Insertional mutation of the Drosophila nuclear lamin Dm0 gene results in defective nuclear envelopes, clustering of nuclear pore complexes, and accumulation of annulate lamellae. J. Cell Biol. 137:1001-16

Abstract

Nuclear lamins are thought to play an important role in disassembly and reassembly of the nucleus during mitosis. Here, we describe a Drosophila lamin Dm0 mutant resulting from a P element insertion into the first intron of the Dm0 gene. Homozygous mutant animals showed a severe phenotype including retardation in development, reduced viability, sterility, and impaired locomotion. Immunocytochemical and ultrastructural analysis revealed that reduced lamin Dm0 expression caused an enrichment of nuclear pore complexes in cytoplasmic annulate lamellae and in nuclear envelope clusters. In several cells, particularly the densely packed somata of the central nervous system, defective nuclear envelopes were observed in addition. All aspects of the mutant phenotype were rescued upon P element-mediated germline transformation with a lamin Dm0 transgene. These data constitute the first genetic proof that lamins are essential for the structural organization of the cell nucleus.

Links

PubMed PMC2136230

Keywords

Animals; Base Sequence; Brain Chemistry; Cytoplasm/chemistry; Cytoplasm/metabolism; Drosophila/chemistry; Drosophila/genetics; Drosophila/metabolism; Drosophila Proteins; Embryo, Nonmammalian/physiology; Fertility/genetics; Fluorescent Antibody Technique, Indirect; Gene Expression Regulation, Developmental/physiology; Genes, Insect/physiology; Germ-Line Mutation/physiology; Homozygote; Introns/genetics; Lamins; Locomotion/genetics; Microscopy, Electron; Microtomy; Molecular Sequence Data; Mutagenesis, Insertional/physiology; Nuclear Envelope/chemistry; Nuclear Envelope/metabolism; Nuclear Envelope/ultrastructure; Nuclear Proteins/genetics; Nuclear Proteins/immunology; Phenotype; Transformation, Genetic/physiology

Significance

Annotations

Gene product Qualifier GO Term Evidence Code with/from Aspect Extension Notes Status

DROME:LAM0

enables

GO:0005200: structural constituent of cytoskeleton

ECO:0000315: mutant phenotype evidence used in manual assertion

F

Seeded From UniProt

complete

DROME:LAM0

involved_in

GO:0006998: nuclear envelope organization

ECO:0000315: mutant phenotype evidence used in manual assertion

P

Seeded From UniProt

complete

DROME:LAM0

involved_in

GO:0051664: nuclear pore localization

ECO:0000315: mutant phenotype evidence used in manual assertion

P

Seeded From UniProt

complete


See also

References

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