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Updated: May 28, 2026
Upright Imaging of Drosophila Embryos
Published on: September 14, 2010
Expression pattern of DMAP-85 during Drosophila embryonic development
V Cambiazo1, M González, R B Maccioni
1Laboratorio de Biología Celular y Molecular, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Santiago, Chile. vcambiaz@uec.inta.uchile.cl
Abstract:
Microtubule-associated proteins (MAPs) play major regulatory roles on the organization and integrity of the cytoskeletal network. Previously, we identified DMAP-85, a Drosophila MAP that promotes tubulin polymerization in vitro. In this work, we examine the distribution of DMAP-85 and its association pattern with microtubules at embryonic stages. Immunoblots revealed that DMAP-85 was present throughout embryogenesis, but it was most abundant in stages 6-9. Immunofluorescence studies showed that DMAP-85 was associated with sub-populations of stable microtubules during embryo cellularization, and after gastrulation with interphase microtubule arrays. At late embryonic stages, it was preferentially found in the ventral nerve cord, co-localizing with axonal microtubules. These observations are in agreement with previous reports on DMAP-85 functions, suggesting that DMAP-85 might be required for the stabilization and organization of cytoplasmic microtubules during embryonic development.
Insights
Drosophila Microtubule-Associated Protein 85 (DMAP-85) is crucial for microtubule organization during embryonic development. This study maps DMAP-85 distribution, revealing its role in stabilizing microtubules in the ventral nerve cord.
Area of Science:
- Cell Biology
- Developmental Biology
- Molecular Biology
Background:
- Microtubule-associated proteins (MAPs) are essential regulators of cytoskeletal organization and integrity.
- DMAP-85, a Drosophila MAP, has been previously identified for its role in promoting tubulin polymerization in vitro.
Purpose of the Study:
- To investigate the embryonic distribution and microtubule association patterns of DMAP-85.
- To understand the functional significance of DMAP-85 during Drosophila embryogenesis.
Main Methods:
- Immunoblotting to determine DMAP-85 abundance across embryonic stages.
- Immunofluorescence microscopy to visualize DMAP-85 localization and its association with microtubules.
Main Results:
- DMAP-85 expression is detected throughout embryogenesis, peaking in stages 6-9.
- DMAP-85 associates with stable microtubules during cellularization and interphase arrays post-gastrulation.
- At later stages, DMAP-85 localizes to axonal microtubules in the ventral nerve cord.
Conclusions:
- DMAP-85 is dynamically associated with microtubules during Drosophila embryonic development.
- The findings suggest DMAP-85 is vital for the stabilization and organization of cytoplasmic microtubules, particularly in the developing nervous system.
