| 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 PubMed
Microtubule 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
- ↑ Askham JM, Vaughan KT, Goodson HV, Morrison EE. Evidence that an interaction between EB1 and p150(Glued) is required for the formation and maintenance of a radial microtubule array anchored at the centrosome. Mol Biol Cell. 2002 Oct;13(10):3627-45. PMID:12388762 doi:10.1091/mbc.E02-01-0061
- ↑ van der Vaart B, Manatschal C, Grigoriev I, Olieric V, Gouveia SM, Bjelic S, Demmers J, Vorobjev I, Hoogenraad CC, Steinmetz MO, Akhmanova A. SLAIN2 links microtubule plus end-tracking proteins and controls microtubule growth in interphase. J Cell Biol. 2011 Jun 13;193(6):1083-99. Epub 2011 Jun 6. PMID:21646404 doi:10.1083/jcb.201012179
- ↑ Hayashi I, Wilde A, Mal TK, Ikura M. Structural basis for the activation of microtubule assembly by the EB1 and p150Glued complex. Mol Cell. 2005 Aug 19;19(4):449-60. PMID:16109370 doi:10.1016/j.molcel.2005.06.034
- ↑ Honnappa S, Gouveia SM, Weisbrich A, Damberger FF, Bhavesh NS, Jawhari H, Grigoriev I, van Rijssel FJ, Buey RM, Lawera A, Jelesarov I, Winkler FK, Wuthrich K, Akhmanova A, Steinmetz MO. An EB1-binding motif acts as a microtubule tip localization signal. Cell. 2009 Jul 23;138(2):366-76. PMID:19632184 doi:S0092-8674(09)00638-2
- ↑ Kumar A, Manatschal C, Rai A, Grigoriev I, Degen MS, Jaussi R, Kretzschmar I, Prota AE, Volkmer R, Kammerer RA, Akhmanova A, Steinmetz MO. Short Linear Sequence Motif LxxPTPh Targets Diverse Proteins to Growing Microtubule Ends. Structure. 2017 Jun 6;25(6):924-932.e4. doi: 10.1016/j.str.2017.04.010. Epub 2017, May 25. PMID:28552577 doi:http://dx.doi.org/10.1016/j.str.2017.04.010
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