The speed of GTP hydrolysis determines GTP cap size and controls microtubule stability.

07:00 EST 13th February 2020 | BioPortfolio

Summary of "The speed of GTP hydrolysis determines GTP cap size and controls microtubule stability."

Microtubules are cytoskeletal polymers whose function depends on their property to switch between states of growth and shrinkage. Growing microtubules are thought to be stabilized by a GTP cap at their ends. The nature of this cap, however, is still poorly understood. End Binding proteins (EBs) recruit a diverse range of regulators of microtubule function to growing microtubule ends. Whether the EB binding region is identical to the GTP cap is unclear. Using mutated human tubulin with blocked GTP hydrolysis, we demonstrate that EBs bind with high affinity to the GTP conformation of microtubules. Slowing-down GTP hydrolysis leads to extended GTP caps. We find that cap length determines microtubule stability and that the microtubule conformation changes gradually in the cap as GTP is hydrolyzed. These results demonstrate the critical importance of the kinetics of GTP hydrolysis for microtubule stability and establish that the GTP cap coincides with the EB-binding region.


Journal Details

This article was published in the following journal.

Name: eLife
ISSN: 2050-084X


DeepDyve research library

PubMed Articles [14587 Associated PubMed Articles listed on BioPortfolio]

The molecular chaperone Hsp90 maintains Golgi organization and vesicular trafficking by regulating microtubule stability.

Hsp90 is an abundant and special molecular chaperone considered to be the regulator of many transcription factors and signaling kinases. Its high abundance is indicative of its involvement in some mor...

SMALL LEAF AND BUSHY1 controls organ size and lateral branching by modulating the stability of BIG SEED1 in Medicago truncatula.

Organ size is a major agronomic trait that determines grain yield and biomass production in crops. However, the molecular mechanisms controlling organ size, especially in legumes, are poorly understoo...

Effect of enzymolysis and glycosylation on the curcumin nanoemulsions stabilized by β-conglycinin: formation, stability and in vitro digestion.

In this study, the oil-in-water nanoemulsions were prepared by 3% (v/v) MCT oil phase (containing 10 mg/mL curcumin) with 3% (v/v) β-conglycinin hydrolysates (7SH) and 3% (v/v) β-conglycinin-DX-40 c...

Speed impacts frontal-plane maneuver stability of individuals with incomplete spinal cord injury.

Following incomplete spinal cord injury, people often move slowly in an effort to maintain stability during walking maneuvers. Here we examine how maneuver speed impacts frontal-plane stability in peo...

Mechanical properties of tubulin intra- and inter-dimer interfaces and their implications for microtubule dynamic instability.

Thirteen tubulin protofilaments, made of αβ-tubulin heterodimers, interact laterally to produce cytoskeletal microtubules. Microtubules exhibit the striking property of dynamic instability, manifest...

Clinical Trials [5267 Associated Clinical Trials listed on BioPortfolio]

Microtubule-Targeted Agent BAL101553 and Radiation Therapy in Treating Patients With Newly Diagnosed Glioblastoma

This phase I trial studies the side effects and best dose of microtubule-targeted agent BAL101553 when given together with radiation therapy in treating patients with newly diagnosed gliob...

The Relationship Between Postural Stability, Performance and Trunk Muscle Endurance in Female Athletes

As core stability improves in handball players, ball-throwing speed increases as well. Postural stability is considered as the most important component of athletic performance as it occurs...

The Relation of Microtubule-Associated Protein 2 and Cell Migration

Clarify the relation of microtubule-associated protein 2 and cell migration

Limits of Stability in Sitting in Healthy Controls and Participants Post Stroke

In this cross-sectional study we will compare the limits of stability in non-ambulatory participants post stroke compared to healthy controls. This will be done by placing participants in ...

CMC I Stability Intraoperative

The goal of the current study is to objectively measure intraoperative the initial thumb stability after trapezium removal when performing trapeziectomy, alone or in combination with suspe...

Medical and Biotech [MESH] Definitions

A microtubule-associated mechanical adenosine triphosphatase, that uses the energy of ATP hydrolysis to move organelles along microtubules toward the plus end of the microtubule. The protein is found in squid axoplasm, optic lobes, and in bovine brain. Bovine kinesin is a heterotetramer composed of two heavy (120 kDa) and two light (62 kDa) chains. EC 3.6.1.-.

Small computers that lack the speed, memory capacity, and instructional capability of the full-size computer but usually retain its programmable flexibility. They are larger, faster, and more flexible, powerful, and expensive than microcomputers.

The extent to which an RNA molecule retains its structural integrity and resists degradation by RNASE, and base-catalyzed HYDROLYSIS, under changing in vivo or in vitro conditions.

A family of high molecular weight GTP phosphohydrolases that play a direct role in vesicle transport. They associate with microtubule bundles (MICROTUBULES) and are believed to produce mechanical force via a process linked to GTP hydrolysis. This enzyme was formerly listed as EC

Dental methods involving the use of DENTAL HIGH-SPEED EQUIPMENT.

Quick Search

DeepDyve research library

Searches Linking to this Article