| 2010 |
FYCO1 forms an adaptor complex with LC3, Rab7, and PI3P (phosphatidylinositol-3-phosphate) on autophagosomal membranes to mediate microtubule plus end-directed vesicle transport. FYCO1 depletion causes perinuclear clustering of autophagosomes, while overexpression redistributes Rab7-positive vesicles to the cell periphery. |
Co-IP/pulldown identification of binding partners, domain mapping of LC3/Rab7/PI3P-binding regions, knockdown and overexpression with live-cell imaging readout |
The Journal of cell biology |
High |
20100911
|
| 2010 |
A proposed mechanism for selective autophagosomal membrane recruitment of FYCO1 involves a conformational change upon LC3-LIR interaction that exposes the FYVE domain for PI3P binding. |
Domain binding assays and functional analysis discussed in review/commentary context with reference to original experimental data |
Autophagy |
Medium |
20364109
|
| 2015 |
FYCO1 contains a C-terminally extended, F-type LIR motif (9 amino acids) that preferentially binds LC3A and LC3B. Crystal structure of FYCO1 LIR peptide–LC3B complex at 1.53 Å resolution revealed that residues at positions 8 (acidic, Asp1285) and 9 (hydrophobic) beyond the core LIR are required for efficient LC3B binding, with Asp1285 contacting His57 of LC3B conferring LC3A/B specificity. A functional LIR motif is required for efficient maturation of autophagosomes under basal (but not starvation-induced) autophagy conditions. |
Crystal structure determination (1.53 Å), peptide array-based 2D mutational scanning, mutational analysis, FYCO1 knockout cell reconstitution with WT and LIR-mutant constructs |
The Journal of biological chemistry |
High |
26468287
|
| 2017 |
Crystal structure of mouse LC3B in complex with the FYCO1 LIR peptide confirmed that flanking sequences N-terminal and C-terminal to the core LIR tetrapeptide are specifically recognized by LC3B and contribute to binding, and that this recognition mechanism is conserved across LC3 isoforms and species. |
X-ray crystallography; structural comparison with related LC3-LIR complexes |
Acta crystallographica. Section F, Structural biology communications |
High |
28291748
|
| 2020 |
Crystal structure of the FYCO1 RUN domain was determined at 1.3 Å resolution; structural comparisons and docking studies identified possible interaction interfaces with small GTPases of the Ras superfamily, but no binding partner was experimentally confirmed. |
X-ray crystallography (1.3 Å), structural comparison, computational docking |
Acta crystallographica. Section F, Structural biology communications |
Medium |
32744243
|
| 2011 |
Loss-of-function mutations in FYCO1 cause autosomal-recessive congenital cataracts. Wild-type and the missense mutant p.L1376Pro FYCO1 expressed in human lens epithelial cells colocalize to autophagosomes and partially to microtubules, consistent with a role in autophagosomal transport in the lens. |
Human genetics (linkage + Sanger sequencing), immunoblot of truncated mutant proteins, subcellular localization by immunofluorescence in human lens epithelial cells |
American journal of human genetics |
Medium |
21636066
|
| 2014 |
During LC3-associated phagocytosis, FYCO1 is recruited directly by LC3 to Dectin-1 phagosomes and facilitates maturation of early p40phox+ phagosomes into late LAMP1+ phagosomes. Loss of FYCO1 prolongs p40phox+ phagosome stage and increases reactive oxygen production. |
FYCO1 knockdown/knockout in macrophages, live imaging and immunofluorescence of phagosome maturation markers, ROS measurement |
Journal of immunology |
Medium |
24442442
|
| 2021 |
STK4/MST1-mediated phosphorylation of LC3B on threonine 50 (LC3B-T50) reduces FYCO1 binding to LC3B. Impairment of LC3B-T50 phosphorylation (T50A mutation) decreases starvation-induced perinuclear positioning of autophagosomes and their colocalization with lysosomes, and causes aberrant anterograde movement of autophagosomes in neurons and peripheral cells. This defines a nutrient-sensitive STK4–LC3B–FYCO1 axis regulating directional autophagosomal transport. |
In vitro binding assays with phospho-LC3B, LC3B phosphorylation mutants, autophagosome tracking by live imaging in neurons and cell lines, lysosome colocalization assays |
Current biology |
High |
34146484
|
| 2021 |
The centrosomal protein Nlp interacts physically with LC3, Rab7, and FYCO1, and enhances the Rab7–FYCO1 interaction, thereby accelerating autophagic flux and autophagolysosome formation. |
Co-IP, colocalization by immunofluorescence, autophagic flux assays, genetic knockout in mice |
Signal transduction and targeted therapy |
Medium |
33859171
|
| 2018 |
FYCO1 mediates Rab7-dependent clearance of α-synuclein aggregates. FYCO1-decorated vesicles contained α-synuclein (unlike RILP-decorated vesicles). FYCO1 overexpression reduced α-synuclein aggregate number and protein levels; FYCO1 knockdown reduced Rab7-induced aggregate clearance. The effect of FYCO1 required active (GTP-bound) Rab7, as dominant-negative Rab7 blocked FYCO1-mediated clearance. FYCO1 coexpression in a Drosophila A53T-α-synuclein model reduced aggregates and rescued locomotor deficits. |
Live-cell imaging, western blot, siRNA knockdown, dominant-negative Rab7, Trypan blue viability, time-lapse microscopy, Drosophila model with filter trap assay and locomotor assay |
Journal of neurochemistry |
High |
29747217
|
| 2016 |
FYCO1 is a component of the chromatoid body (CB) in haploid round spermatids. Autophagy induction recruits lysosomal vesicles to the CB in a FYCO1-dependent manner; in germ cell-specific Fyco1 conditional knockout mice, this recruitment is lost and the CB becomes fragmented, indicating FYCO1-mediated autophagy regulates RNP granule integrity. |
Germ cell-specific conditional Fyco1 knockout mouse model, electron microscopy, immunofluorescence, autophagy induction assays |
Autophagy |
High |
27929729
|
| 2017 |
FYCO1 is responsible for formation of LC3-containing membrane around post-mitotic midbodies and regulates midbody degradation by autophagy. FYCO1 knockdown increases midbody accumulation, which in turn promotes anchorage-independent growth and invadopodia formation in HeLa and squamous carcinoma cells. |
FYCO1 siRNA knockdown, immunofluorescence for LC3/midbody markers, midbody accumulation quantification, anchorage-independent growth assay, invadopodia assay |
Journal of cell science |
Medium |
29196475
|
| 2022 |
Loss of FYCO1 in fyco1 knockout mice results in diminished autophagic flux, impaired organelle removal (organelles accumulate in the organelle-free zone of the lens), and cataractogenesis, confirming FYCO1's role in lens fiber cell differentiation via autophagy-dependent organelle clearance. |
Fyco1 knockout mice, flow cytometry of autophagic flux in FYCO1 knock-in human lens epithelial cells, transmission electron microscopy of lens organoids and mouse lenses, transcriptome/proteome/metabolome profiling |
Autophagy |
High |
35343376
|
| 2021 |
FYCO1 interacts with αA- and αB-crystallin (identified by yeast two-hybrid and confirmed by co-immunoprecipitation). In FYCO1 knockout mice, soluble αA- and αB-crystallin decrease, LC3-I to LC3-II conversion is reduced, and p62 accumulates, suggesting FYCO1 recruits damaged α-crystallin into autophagosomes. |
Yeast two-hybrid screening, co-immunoprecipitation, immunoblot of LC3-I/LC3-II conversion and p62 in KO mouse eyes |
Scientific reports |
Medium |
34215815
|
| 2023 |
FYCO1 interacts with activated CASP8 (caspase 8) via its C-terminal GOLD domain and is a specific CASP8 substrate cleaved at aspartate 1306, releasing the GOLD domain and inactivating FYCO1. FYCO1 also interacts via its GOLD domain with the CCZ1–MON1A complex required for RAB7A activation and vesicle-lysosome fusion. Loss of FYCO1 impairs TNFRSF10B/TRAIL-R2 transport to lysosomes and stabilizes the DISC, sensitizing cells to TRAIL-induced apoptosis. |
Two-step Co-IP/affinity purification–mass spectrometry (AP-MS), CASP8 cleavage site mapping, FYCO1 KO and knockdown cell lines, DISC complex analysis, receptor trafficking assays, flow cytometry of apoptosis |
Autophagy |
High |
37418591
|
| 2021 |
FYCO1 is required for autophagy induction (but not basal autophagy) in cardiomyocytes in response to glucose deprivation. Fyco1-deficient mice subjected to starvation or pressure overload cannot induce autophagy and develop impaired cardiac function. FYCO1 overexpression induces autophagy in cardiomyocytes and rescues cardiac dysfunction under biomechanical stress. |
Fyco1 knockout mice with pressure-overload and starvation models, FYCO1 transgenic overexpression mice, autophagic flux measurement in isolated cardiomyocytes, cardiac function assessment |
JACC. Basic to translational science |
High |
33997522
|
| 2022 |
FYCO1 promotes migration, invasion, invadopodia formation, and epithelial-mesenchymal transition in HeLa cells through the CDC42/N-WASP/Arp2/3 signaling pathway, as demonstrated by pharmacological inhibition of Arp2/3 with CK666 blocking FYCO1-dependent migration and invasion. |
FYCO1 overexpression/knockdown, wound healing assay, transwell invasion assay, immunofluorescence for invadopodia, western blot, Arp2/3 inhibitor (CK666) epistasis |
Biochemistry and cell biology |
Medium |
36342046
|
| 2024 |
FYCO1 knockout in human lens epithelial cells suppresses H2O2- and UVB-induced senescence and p21 levels by suppressing the expression of PAK1 (p21-activated kinase 1), identifying a FYCO1–PAK1–p21 axis in stress-induced autophagy and senescence in lens epithelial cells. |
FYCO1 knockout cell lines, CCK8 viability, SA-β-Gal senescence assay, qRT-PCR, western blot, immunofluorescence, UVB/H2O2 stress models |
Archives of biochemistry and biophysics |
Medium |
39395618
|
| 2024 |
Depletion of FYCO1 did NOT phenocopy protrudin or KIF5 depletion for endosomal tubule fission (ETF), establishing that FYCO1's role in late endosome motility is distinct from KIF5-mediated ETF at ER-endosome contacts. |
Knockdown epistasis; ETF phenotype (increased endosomal tubulation) was assessed by imaging |
bioRxiv (preprint)preprint |
Low |
bio_10.1101_2024.07.15.602703
|