interphase microtubule organizing center
A microtubule organizing center found in interphase cells, which organize a longitudinal array of three to five MT bundles from the nuclear envelope during interphase. Each MT bundle is composed of two to seven MTs arranged in an antiparallel configuration, with the dynamic MT plus ends extending toward the cell tips and stable minus ends near the nucleus.
mitochondrial translation preinitiation complex
A ribonucleoprotein complex comprising of the 28S small mitoribosomal subunit (mt-SSU) and mitochondrial initiation factors (e.g. mtIF3 and mtIF2-GTP) and the initiator tRNA-Met and an mRNA binding. The early steps of translation initiation, including the association of the 28S mitochondrial small subunit (mt-SSU) with initiation factors (mtIF3 and mtIF2), prevention of premature large subunit (39S) joining occur during the assembly of the mitochondrial pre-initiation complex (mtPIC).
anastral spindle assembly
The aggregation, arrangement and bonding together of a set of components to form the spindle, the array of microtubules and associated molecules that serves to move duplicated chromosomes apart, in the absence of centrosomes. Formation is initiated by the nucleation of microtubules (MTs) in the vicinity of condensed chromatin. MTs then attach to and congress around the chromatin due to activity of microtubule motors. A bipolar spindle is formed by focusing of the terminal ends of the MT array into spindle poles by molecular motors and cross-linking proteins.