Protein bir1; Seems to act in the pleiotropic control of cell division. Has a role in chromosome segregation by recruiting condensin and ark1 kinase to appropriate sites as the cell progresses through mitosis. Ark1 activity depends upon bir1 function and phosphorylation. Ark1 with bir1 function is required for full-scale association with kinetochores and formation of a complex with mad3.

Serine/threonine-protein kinase ark1; Required for the spindle checkpoint attachment response during spindle formation, kinetochore microtubule interactions and chromosome segregation during anaphase. Ark1 activity depends upon cut17 function and phosphorylation. Ark1 with bir1 is required for full-scale association with kinetochores and formation of a complex with mad3. Ark1 is also required for phosphorylation of histone H3 that accompanies chromosome condensation and condensin recruitment to mitotic chromatin. Ark1 with pic1 is required for the execution of cytokinesis.

Anaphase-promoting complex subunit 13; Component of the anaphase promoting complex/cyclosome (APC/C), a cell cycle-regulated E3 ubiquitin-protein ligase complex that controls progression through mitosis and the G1 phase of the cell cycle. The APC/C is thought to confer substrate specificity and, in the presence of ubiquitin-conjugating E2 enzymes, it catalyzes the formation of protein-ubiquitin conjugates that are subsequently degraded by the 26S proteasome.

Inner kinetochore subunit mis15; Component of the kinetochore, a multiprotein complex that assembles on centromeric DNA and attaches chromosomes to spindle microtubules, mediating chromosome segregation and sister chromatid segregation during meiosis and mitosis. Component of the inner kinetochore constitutive centromere-associated network (CCAN), which serves as a structural platform for outer kinetochore assembly. Has a role in the formation and/or maintenance of specialized chromatin at the centromere.

Shugoshin-2; Involved in chromosome cohesion during mitosis and meiosis by preventing premature dissociation of cohesin complex from centromeres after prophase, when most of cohesin complex dissociates from chromosomes arms. Required for faithful mitotic chromosome segregation and proper kinetochore orientation during meiosis I. In contrast to sgo1, it is dispensable for centromeric protection of rec8 during meiosis I as well as protection of rad21 during mitosis. Required to sense the lack of tension at centromeres during mitosis.

DASH complex subunit spc19; Component of the DASH complex, a microtubule-binding subcomplex of the outer kinetochore that is essential for proper chromosome segregation. The DASH complex mediates the formation and maintenance of bipolar kinetochore-microtubule attachments by forming closed rings around spindle microtubules and establishing interactions with proteins from the central kinetochore. May be necessary for growth under high osmotic stress.

Uncharacterized protein C959.06c.

M cell-type agglutination protein mam3; M cell-type specific protein involved in agglutination during conjugation; Belongs to the mam3/map4 family.

Kinesin-like protein tea2; Promotes microtubule growth, possibly through interactions with the microtubule end, and is important for establishing and maintaining polarized growth along the long axis of the cell. Acts as a kinesin motor protein that moves along microtubules and is required for proper localization of tea1 and tip1 to the cell tips and microtubules, respectively. ATPase activity stimulated via interaction with mal3. Belongs to the TRAFAC class myosin-kinesin ATPase superfamily. Kinesin family.