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Mitochondria-ER Tethering in Neurodegenerative Diseases

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Abstract

Organelles juxtaposition has been detected for decades, although only recently gained importance due to a pivotal role in the regulation of cellular processes dependent on membrane contact sites. Endoplasmic reticulum (ER) and mitochondria interaction is a prime example of organelles contact sites. Mitochondria-associated membranes (MAM) are proposed to harbor ER-mitochondria tether complexes, mainly when these organelles are less than 30 nm apart. Dysfunctions of proteins located at the MAM are associated with neurodegenerative diseases such as Parkinson’s, Alzheimer’s and amyotrophic lateral sclerosis, as well as neurodevelopmental disorders; hence any malfunction in MAM can potentially trigger cell death. This review will focus on the role of ER-mitochondria contact sites, regarding calcium homeostasis, lipid metabolism, autophagy, morphology and dynamics of mitochondria, mainly in the context of neurodegenerative diseases. Approaches that have been employed so far to study organelles contact sites, as well as methods that were not used in neurosciences yet, but are promising and accurate ways to unveil the functions of MAM during neurodegeneration, is also discussed in the present review.

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Abbreviations

α-syn:

Alpha-synuclein

Aβ:

Amyloid-beta peptide

ACAT1:

Cholesterol acyltransferase/sterol O-acyltransferase 1 (same as SOAT1)

AD:

Alzheimer’s disease

ALS:

Amyotrophic lateral sclerosis

APEX:

Ascorbate peroxidase

APOE4:

Apolipoprotein E4

APP:

Amyloid precursor protein

ATG2A:

Autophagy-related protein 2 homolog A

ATG9A:

Autophagy-related protein 9 homolog A

ATG14L:

Autophagy-related 14-like

BAP31:

B-cell receptor-associated protein 31

BECN1:

Beclin-1

BiC:

Bimolecular complementation

BioID:

Proximity based biotin identification

BRET:

Bioluminescence resonance energy transfer

CACNA1A:

Calcium Voltage-Gated Channel Subunit Alpha1 A

CE:

Cholesteryl-ester

CLEM:

Correlative light and electron microscopy

CMT2A:

Charcot–Marie–Tooth type 2A

Cryo-ET:

Electron cryo-tomography

Cryo-FIB:

Cryo-focused ion beam

ddFP:

Dimerization-dependent fluorescent protein

DFCP1:

Double FYVE domain-containing protein 1

DGAT2:

Diacylglycerol O-acyltransferase 2

DRP1:

Dynamin-Related Protein 1

EI24:

Etoposide-induced protein 2.4

EM:

Electron microscopy

ER:

Endoplasmic reticulum

FACL4:

Fatty acid CoA ligase 4 (same as ACS4)

FIB-SEM:

Focused ion beam-scanning EM

FIP200:

Focal adhesion kinase (FAK) family interacting protein of 200 kDa

FIS1:

Mitochondrial fission 1 protein

FRET:

Fluorescence resonance energy transfer

GRP75:

Glucose regulated protein 75

GSK-3β:

Glycogen synthase kinase-3 beta

hiPS:

Human-induced pluripotent stem cell

IP3R:

Inositol 1, 4, 5-trisphosphate receptor

KIF5C:

Kinesin Family Member 5C

LB:

Lewy bodies

LRRK2:

Leucine-rich repeat kinase 2

MAM:

Mitochondria-associated membranes

MEF:

Mouse embryonic fibroblasts

MERCs:

Mitochondria-ER contact sites

MFN1 and MFN2:

Mitochondrial fusion GTPases mitofusins 1 and 2

MID49:

Mitochondrial dynamics protein of 49 kDa

MIRO1 and 2:

Mitochondrial Rho GTPase 1 and 2 (same as RHOT1 and 2)

MITOL:

Mitochondrial ubiquitin ligase (same as MARCH5)

Mul1:

Mitochondrial E3 ubiquitin protein ligase 1

ORP5/8:

Oxysterol-binding protein related-protein 5 and 8

PC:

Phosphatidylcholine

PD:

Parkinson’s disease

PDZD8:

PDZ domain-containing protein 8

PE:

Phosphatidylethanolamine

PEMT2:

Phosphatidylethanolamine N-methyltransferase 2

PINK1:

PTEN-induced kinase 1

PLA:

Proximity ligation assay

PSEN 1 and 2:

Presenilin 1 and 2

PSS 1 and 2:

Phosphatidylserine synthases 1 and 2

PTPIP51:

Protein tyrosine phosphatase interacting protein 51 (same as RMDN3)

ROS:

Reactive oxygen species

SBF-SEM:

Serial block-face scanning electron microscopy

SEM:

Scanning electron microscopy

Sig-1R:

Sigma-1 receptor

SNCA:

Alpha-synuclein gene

TDP-43:

TAR DNA binding protein 43

TEM:

Transmission electron microscopy

TRAK:

Trafficking kinesin protein (same as Milton)

ULK1:

Unc-51 like autophagy activating kinase

VAPB:

Vesicle-associated membrane protein (VAMP)-associated protein B

VDAC:

Voltage-dependent anion-selective channel protein 1

VPS13A:

Vacuolar Protein Sorting 13 Homolog A

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Acknowledgements

Authors were awarded with research grants from Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP #13/08028-1, #18/07592-4 and #19/01290-9).

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Correspondence to Reza Raeisossadati or Merari F. R. Ferrari.

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Raeisossadati, R., Ferrari, M.F.R. Mitochondria-ER Tethering in Neurodegenerative Diseases. Cell Mol Neurobiol 42, 917–930 (2022). https://doi.org/10.1007/s10571-020-01008-9

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