Unknown

Dataset Information

0

Locking GTPases covalently in their functional states.


ABSTRACT: GTPases act as key regulators of many cellular processes by switching between active (GTP-bound) and inactive (GDP-bound) states. In many cases, understanding their mode of action has been aided by artificially stabilizing one of these states either by designing mutant proteins or by complexation with non-hydrolysable GTP analogues. Because of inherent disadvantages in these approaches, we have developed acryl-bearing GTP and GDP derivatives that can be covalently linked with strategically placed cysteines within the GTPase of interest. Binding studies with GTPase-interacting proteins and X-ray crystallography analysis demonstrate that the molecular properties of the covalent GTPase-acryl-nucleotide adducts are a faithful reflection of those of the corresponding native states and are advantageously permanently locked in a defined nucleotide (that is active or inactive) state. In a first application, in vivo experiments using covalently locked Rab5 variants provide new insights into the mechanism of correct intracellular localization of Rab proteins.

SUBMITTER: Wiegandt D 

PROVIDER: S-EPMC4518245 | biostudies-literature | 2015 Jul

REPOSITORIES: biostudies-literature

altmetric image

Publications

Locking GTPases covalently in their functional states.

Wiegandt David D   Vieweg Sophie S   Hofmann Frank F   Koch Daniel D   Li Fu F   Wu Yao-Wen YW   Itzen Aymelt A   Müller Matthias P MP   Goody Roger S RS  

Nature communications 20150716


GTPases act as key regulators of many cellular processes by switching between active (GTP-bound) and inactive (GDP-bound) states. In many cases, understanding their mode of action has been aided by artificially stabilizing one of these states either by designing mutant proteins or by complexation with non-hydrolysable GTP analogues. Because of inherent disadvantages in these approaches, we have developed acryl-bearing GTP and GDP derivatives that can be covalently linked with strategically place  ...[more]

Similar Datasets

| S-EPMC5754786 | biostudies-literature
| S-EPMC5429992 | biostudies-literature
| S-EPMC7182014 | biostudies-literature
| S-EPMC10723684 | biostudies-literature
| S-EPMC3441499 | biostudies-literature
| S-EPMC2064854 | biostudies-other
| S-EPMC6949409 | biostudies-literature
| S-EPMC8509916 | biostudies-literature
| S-EPMC2897208 | biostudies-literature
| S-EPMC5902227 | biostudies-literature