5n74
From Proteopedia
Microtubule end binding protein complex
Structural highlights
Function[MARE1_HUMAN] Binds to the plus end of microtubules and regulates the dynamics of the microtubule cytoskeleton. Promotes cytoplasmic microtubule nucleation and elongation. May be involved in spindle function by stabilizing microtubules and anchoring them at centrosomes. May play a role in cell migration.[1] [2] [3] [4] [KAR9_YEAST] Involved in karyogamy. Component of a cortical adaptor complex that orients cytoplasmic microtubules. It may be involved in anchoring cytoplasmic microtubules to the cell cortex. Publication Abstract from PubMedMicrotubule plus-end tracking proteins (+TIPs) are involved in virtually all microtubule-based processes. End-binding (EB) proteins are considered master regulators of +TIP interaction networks, since they autonomously track growing microtubule ends and recruit a plethora of proteins to this location. Two major EB-interacting elements have been described: CAP-Gly domains and linear SxIP sequence motifs. Here, we identified LxxPTPh as a third EB-binding motif that enables major +TIPs to interact with EBs at microtubule ends. In contrast to EB-SxIP and EB-CAP-Gly, the EB-LxxPTPh binding mode does not depend on the C-terminal tail region of EB. Our study reveals that +TIPs developed additional strategies besides CAP-Gly and SxIP to target EBs at growing microtubule ends. They further provide a unique basis to discover novel +TIPs, and to dissect the role of key interaction nodes and their differential regulation for hierarchical +TIP network organization and function in eukaryotic organisms. Short Linear Sequence Motif LxxPTPh Targets Diverse Proteins to Growing Microtubule Ends.,Kumar A, Manatschal C, Rai A, Grigoriev I, Degen MS, Jaussi R, Kretzschmar I, Prota AE, Volkmer R, Kammerer RA, Akhmanova A, Steinmetz MO Structure. 2017 Jun 6;25(6):924-932.e4. doi: 10.1016/j.str.2017.04.010. Epub 2017, May 25. PMID:28552577[5] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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