Lerit DA, Shebelut CW, Lawlor KJ, Rusan NM, Gavis ER, Schedl P, et al. Germ Cell-less Promotes Centrosome Segregation to Induce Germ Cell Formation.
Unlike fruit flies, which cannot form germ cells without oskar, removing the gene from crickets has no effect on germ cell formation.
Analysis of two newly identified oskar localization factors, Rumpelstiltskin and Lost, that are required specifically for this late phase of oskar localization shows that germ plasm amplification ensures robust abdomen and germ cell formation during embryogenesis.
He also investigated the basic cytological processes of cell division, germ cell formation, fertilization, and embryonic development, using microscopic description and carefully designed experiments to understand the relevance of centrosomes, chromosomes, and cytoplasm and their interplay.
This, as per our knowledge, is first such study in higher mammals, especially farm animals, and assumes significance for its potential use in transgenic animal production, elite animal conservation and propagation, augmentation of reproductive performance in poor breeding buffalo species, and as a model for understanding human germ cell formation.
Such mixing, which commonly happens to the chromosomal DNA during germ cell formation, is called recombination.
It was previously reported that specific Tudor domains are required for germ cell formation and Tud localization.
One such mutant includes tudA36 which has a point mutation in the first Tudor domain, suggesting that this Tudor domain may not be crucial for germ cell formation.
The formation of germ cell precursors depends on a specialized cytoplasm known as germ plasm, which contains RNAs and proteins that are required for embryonic patterning and germ cell formation [2], [3], [4], [5].
However, this mutation supports a significant level of germ cell formation, as does the tud4 mutation affecting the domain 4 (which corresponds to domain 7 in Arkov et al. [29]), whereas tudB42 in domain 7 (which corresponds to domain 10 in Arkov et al. [29]) completely abolishes germ cell formation [29].
