Proteomics and bioinformatics analyses identify novel cellular roles outside mitochondrial function for human miro GTPases

Kay, Laura, Sangal, Vartul, Black, Gary and Soundararajan, Meera (2019) Proteomics and bioinformatics analyses identify novel cellular roles outside mitochondrial function for human miro GTPases. Molecular and Cellular Biochemistry, 451 (1-2). pp. 21-35. ISSN 0300-8177

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The human Miro GTPases (hMiros) have recently emerged as important mediators of mitochondrial transport and may significantly contribute to the development of disorders such as Alzheimer’s and schizophrenia. The hMiros represent two highly atypical members of the Ras superfamily, and exhibit several unique features: the presence of a GTPase domain at both the N-terminus and C-terminus, the presence of two calcium-binding EF-hand domains and localisation to the mitochondrial outer membrane. Here, elucidation of Miro GTPase signalling pathway components was achieved through the use of molecular biology, cell culture techniques and proteomics. An investigation of this kind has not been performed previously; we hoped, through these techniques, to enable the profiling and identification of pathways regulated by the human Miro GTPases. The results indicate several novel putative interaction partners for hMiro1 and hMiro2, including numerous proteins previously implicated in neurodegenerative pathways and the development of schizophrenia. Furthermore, we show that the N-terminal GTPase domain appears to fine-tune hMiro signalling, with GTP-bound versions of this domain associated with a diverse range of interaction partners in comparison to corresponding GDP-bound versions. Recent evidences suggest that human Miros participate in host–pathogen interactions with Vibrio Cholerae type III secretion proteins. We have undertaken a bioinformatics investigation to identify novel pathogenic effectors that might interact with Miros.

Item Type: Article
Uncontrolled Keywords: Miro1, Miro2, Atypical GTPase, Mitochondrial function, Proteomics, Neurodegeneration, RhoC, Type III secretion system, VopE, Endoplasmic reticulum signalling
Subjects: C400 Genetics
Department: Faculties > Health and Life Sciences > Applied Sciences
Depositing User: Becky Skoyles
Date Deposited: 29 Jun 2018 14:22
Last Modified: 01 Aug 2021 07:32

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