6d71
Crystal Structure of the Human Miro1 N-terminal GTPase bound to GTP
Structural highlights
FunctionMIRO1_HUMAN Mitochondrial GTPase involved in mitochondrial trafficking. Probably involved in control of anterograde transport of mitochondria and their subcellular distribution.[1] [2] Publication Abstract from PubMedDysfunction in mitochondrial dynamics is believed to contribute to a host of neurological disorders and has recently been implicated in cancer metastasis. The outer mitochondrial membrane adapter protein Miro functions in the regulation of mitochondrial mobility and degradation, however, the structural basis for its roles in mitochondrial regulation remain unknown. Here, we report a 1.7A crystal structure of N-terminal GTPase domain (nGTPase) of human Miro1 bound unexpectedly to GTP, thereby revealing a non-catalytic configuration of the putative GTPase active site. We identify two conserved surfaces of the nGTPase, the "SELFYY" and "ITIP" motifs, that are potentially positioned to mediate dimerization or interaction with binding partners. Additionally, we report small angle X-ray scattering (SAXS) data obtained from the intact soluble HsMiro1 and its paralog HsMiro2. Taken together, the data allow modeling of a crescent-shaped assembly of the soluble domain of HsMiro1/2. PDB RSEFERENCE: Crystal structure of the human Miro1 N-terminal GTPase bound to GTP, 6D71. Insight into human Miro1/2 domain organization based on the structure of its N-terminal GTPase.,Smith KP, Focia PJ, Chakravarthy S, Landahl EC, Klosowiak JL, Rice SE, Freymann DM J Struct Biol. 2020 Oct 24;212(3):107656. doi: 10.1016/j.jsb.2020.107656. PMID:33132189[3] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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