Mitotic spindle assembly checkpoint protein MAD1 - Q9Y6D9 (MD1L1_HUMAN)

 

Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for Q9Y6D9: 2
 
Function
Component of the spindle-assembly checkpoint that prevents the onset of anaphase until all chromosomes are properly aligned at the metaphase plate. May recruit MAD2L1 to unattached kinetochores. Has a role in the correct positioning of the septum. Required for anchoring MAD2L1 to the nuclear periphery. Binds to the TERT promoter and represses telomerase expression, possibly by interfering with MYC binding. UniProt
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Subunit Structure
Homodimer. Heterodimerizes with MAD2L1 in order to form a tetrameric MAD1L1-MAD2L1 core complex (PubMed:9546394, PubMed:18981471, PubMed:22351768, PubMed:12006501). Perturbation of the original MAD1L1-MAD2L1 structure by the spindle checkpoint may decrease MAD2L1 affinity for MAD1L1. CDC20 can compete with MAD1L1 for MAD2L1 binding, until the attachment and/or tension dampen the checkpoint signal, preventing further release of MAD2L1 on to CDC20. Also able to interact with the BUB1/BUB3 complex (PubMed:10198256). Interacts with NEK2 (PubMed:14978040). Interacts with TPR; the interactions occurs in a microtubule-independent manner (PubMed:18981471, PubMed:19273613, PubMed:20133940). Interacts with IK (PubMed:22351768). Interacts with the viral Tax protein (PubMed:9546394). UniProt
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The PDB to UniProt mapping is based on the data provided by the EBI SIFTS project. See also Velankar et al., Nucleic Acids Research 33, D262-265 (2005).
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