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TitleVASH1-SVBP and VASH2-SVBP generate different detyrosination profiles on microtubules.
Journal, issue, pagesJ Cell Biol, Vol. 222, Issue 2, Year 2023
Publish dateFeb 6, 2023
AuthorsSacnicte Ramirez-Rios / Sung Ryul Choi / Chadni Sanyal / Thorsten B Blum / Christophe Bosc / Fatma Krichen / Eric Denarier / Jean-Marc Soleilhac / Béatrice Blot / Carsten Janke / Virginie Stoppin-Mellet / Maria M Magiera / Isabelle Arnal / Michel O Steinmetz / Marie-Jo Moutin /
PubMed AbstractThe detyrosination/tyrosination cycle of α-tubulin is critical for proper cell functioning. VASH1-SVBP and VASH2-SVBP are ubiquitous enzymes involved in microtubule detyrosination, whose mode of ...The detyrosination/tyrosination cycle of α-tubulin is critical for proper cell functioning. VASH1-SVBP and VASH2-SVBP are ubiquitous enzymes involved in microtubule detyrosination, whose mode of action is little known. Here, we show in reconstituted systems and cells that VASH1-SVBP and VASH2-SVBP drive the global and local detyrosination of microtubules, respectively. We solved the cryo-electron microscopy structure of VASH2-SVBP bound to microtubules, revealing a different microtubule-binding configuration of its central catalytic region compared to VASH1-SVBP. We show that the divergent mode of detyrosination between the two enzymes is correlated with the microtubule-binding properties of their disordered N- and C-terminal regions. Specifically, the N-terminal region is responsible for a significantly longer residence time of VASH2-SVBP on microtubules compared to VASH1-SVBP. We suggest that this VASH region is critical for microtubule detachment and diffusion of VASH-SVBP enzymes on lattices. Our results suggest a mechanism by which VASH1-SVBP and VASH2-SVBP could generate distinct microtubule subpopulations and confined areas of detyrosinated lattices to drive various microtubule-based cellular functions.
External linksJ Cell Biol / PubMed:36512346 / PubMed Central
MethodsEM (single particle)
Resolution3.6 Å
Structure data

14634

7zcw

EMDB-14634, PDB-7zcw:
Cryo-EM structure of GMPCPP-microtubules in complex with VASH2-SVBP
Method: EM (single particle) / Resolution: 3.6 Å

Chemicals

ChemComp-GTP:
GUANOSINE-5'-TRIPHOSPHATE / GTP, energy-carrying molecule*YM / Guanosine triphosphate

ChemComp-MG:
Unknown entry

ChemComp-G2P:
PHOSPHOMETHYLPHOSPHONIC ACID GUANYLATE ESTER / GMP-CPP, energy-carrying molecule analogue*YM

Source
  • homo sapiens (human)
  • human (human)
KeywordsPROTEIN BINDING / Microtubule / Enzyme / Complex / Detyrosination

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