Spindle checkpoint function and thus accurate mitosis relies on the Mad proteins Mad1, Mad2 and BubR1, the Bub proteins Bub1 and Bub3, the mitotic kinases Aurora A and Aurora B, as well as Chk1 [12], [12].
The fact that bub-1 mutants caused only postembryonic-born VD neuron defects suggested two possible reasons: 1) bub-1 is a maternal gene and 2) bub-1 is specifically required at postembryonic stages.
Identification of c onserved u nusual k inases and s ome aPKs: Conserved ePKs with unusual sequences such as SLOB, SCYL1, Bub, Bud32 and Haspin tend to score poorly in searches using protein kinase HMMs.
C. elegans has a single homolog of BUB1, bub-1.
Sperms, however, formed only in 2 of the 9 bub-1 mutant animals observed by DAPI staining (Figure 5D).
Late anaphase oocyte spindles stained for DNA (blue), ring markers (SEP-1, MPM-2, BUB-1, respectively; red), and tubulin (green).
Critical for KNL1's role in ensuring high fidelity chromosome segregation is the recruitment of the paralogs BUBR1 and BUB1 (BUBs) to the outer kinetochore.
Ear putty, ear muffs (Minimuffs, Natus Medical Inc., Galway, Ireland), and ear-defenders (Em's 4 Bubs Baby Earmuffs, Em's 4 Kids, Brisbane, Australia) were fitted (sound attenuation levels: 23 dB, 7 dB, and 22 dB, respectively).
All QUS parameters were significantly correlated to BMD (R = 0.83 for nBUA, R = 0.81 for SOS and R = 0.69 for BUB) and to microarchitectural parameters (R = − 0.79 between nBUA and Tb.Sp, R = − 0.81 between SOS and Tb.Sp, R = − 0.65 between BUB and BS/BV).
Several mammalian gene products have been identified to function at the spindle assembly checkpoint including the Mad (mitotic arrest defective) proteins Mad 1-3, the Bub (budding uninhibited by benomyl) proteins, Bub 1-3 and Mps1.
In fzy-1(h1983); bub-1 fw8) bub-1 fw8tant, the function of bub-1 was abolishedoublefzy-1 was not inhibited.
