Protein: Inner kinetochore subunit MCM21 (CENP-O homolog) (Constitutive centromere-associated network protein MCM21) (Minichromosome maintenance protein 21) (Q6CVQ9)
Organism: Kluyveromyces lactis (strain ATCC 8585 / CBS 2359 / DSM 70799 / NBRC 1267 / NRRL Y-1140 / WM37) (Yeast) (Candida sphaerica)
Function: 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 (By similarity). Component of the inner kinetochore COMA subcomplex, which connects centromere-associated proteins and the outer kinetochore. COMA interacts with other inner kinetochore proteins to form the inner kinetochore constitutive centromere-associated network (CCAN), which serves as a structural platform for outer kinetochore assembly (By similarity).
Subcellular location: Nucleus {ECO:0000250|UniProtKB:Q06675}. Chromosome, centromere, kinetochore {ECO:0000250|UniProtKB:Q06675}.
Sequence: MEETEAVQQDIEALEREIQTIKIQIANAHSGASKDEVKIPDAYKQFLSENINFSNLMRKDENTTLSINLSPRKPGTTTGQIQGIDSSIRSNFGVSSGHNEVAGFKSITDFVQWENSVRLIGVSLFPVNYDNIEFMGIRLELFDELSLKYDPPFYVILKPSVKRLGIWELFKHNLPKYINIHQHWQLITKDTDTSDSNIMKFANLCYKDLLKVHSRVQFFRKLEGNYVNDKQYSLLHIDNMGLNVSFRLGADIIKIKVDDGDDEIIDCTFNGEKNISLLGSIYGITNRFQSIIM
InterPro domains: - IPR018464: Centromere protein O (family) [126-268]
Interaction partners: - Inner kinetochore subunit OKP1
- Inner kinetochore subunit AME1
- Inner kinetochore subunit CTF19
- Histone H3-like centromeric protein CSE4
- KLLA0D11770p
- KLLA0E05347p
- KLLA0B04070p
- Probable kinetochore protein SPC24
- KLLA0F22990p
- Probable kinetochore protein SPC25
Gene Ontology annotations:
Molecular Function (MF): GO:0003674 (molecular function), GO:0005488 (binding), GO:0005515 (protein binding)
Biological Process (BP): GO:0008150 (biological process), GO:0009987 (cellular process), GO:0071840 (cellular component organization or biogenesis), GO:0022402 (cell cycle process), GO:0007049 (cell cycle), GO:0016043 (cellular component organization), GO:0007059 (chromosome segregation), GO:1903047 (mitotic cell cycle process), GO:0000278 (mitotic cell cycle), GO:0098813 (nuclear chromosome segregation), GO:0006996 (organelle organization), GO:0000070 (mitotic sister chromatid segregation), GO:0140014 (mitotic nuclear division), GO:0048285 (organelle fission), GO:0000819 (sister chromatid segregation), GO:0051276 (chromosome organization), GO:0000280 (nuclear division)
Cellular Component (CC): GO:0005575 (cellular component), GO:0032991 (protein-containing complex), GO:0110165 (cellular anatomical entity), GO:0005622 (intracellular anatomical structure), GO:0043226 (organelle), GO:0140534 (endoplasmic reticulum protein-containing complex), GO:0098687 (chromosomal region), GO:0140513 (nuclear protein-containing complex), GO:0099080 (supramolecular complex), GO:0043229 (intracellular organelle), GO:0000775 (chromosome, centromeric region), GO:0000776 (kinetochore), GO:0043228 (non-membrane-bounded organelle), GO:0000779 (condensed chromosome, centromeric region), GO:0043232 (intracellular non-membrane-bounded organelle), GO:0005694 (chromosome), GO:0000793 (condensed chromosome)