| 2008 |
FANCL (with E2 enzyme Ube2t) is the minimal machinery sufficient to monoubiquitinate FANCD2 in vitro; a conserved RWD-like domain in FANCL stimulates monoubiquitination, and addition of FANCI enhances the reaction and restricts it to the correct in vivo lysine residue on FANCD2. |
In vitro reconstitution of monoubiquitination with purified Ube2t and FANCL; domain mutagenesis; addition of FANCI to assess site-restriction |
Molecular cell |
High |
19111657
|
| 2004 |
FANCL, not BRCA1, is the likely E3 ubiquitin ligase responsible for FANCD2 monoubiquitination; monoubiquitinated FANCD2 preferentially associates with chromatin and nuclear matrix, and this association is lost in FANCL-mutant cells. |
Cell fractionation (chromatin/nuclear matrix vs. soluble fraction) in FANCL-mutant and BRCA1-mutant cell lines; evolutionary co-existence analysis |
Cell cycle (Georgetown, Tex.) |
Medium |
14712086
|
| 2006 |
The WD40 repeats of FANCL are required for interaction with other FA core complex subunits, while the PHD/RING domain is dispensable for complex assembly but required for FANCD2 monoubiquitination and E2 recruitment; a conserved tryptophan in the PHD domain is critical for E2 binding and FANCD2 monoubiquitination. |
Domain deletion/mutation analysis, co-immunoprecipitation, in vivo FANCD2 monoubiquitination assay, in vitro auto-ubiquitination assay, mitomycin C resistance complementation |
The Journal of biological chemistry |
High |
16474167
|
| 2010 |
Crystal structure of FANCL at 3.2 Å reveals three domains: an N-terminal E2-like fold (ELF domain), a novel double-RWD (DRWD) domain responsible for substrate (FANCD2) binding, and a C-terminal RING domain for E2 binding; the architecture is fundamentally different from sequence-based predictions. |
X-ray crystallography; in vitro binding assays to define domain functions |
Nature structural & molecular biology |
High |
20154706
|
| 2009 |
FANCI can be monoubiquitinated on Lys-523 by the UBE2T-FANCL pair in vitro, and FANCI binds branched DNA structures preferentially through its C-terminal fragment. |
In vitro ubiquitination assay with purified UBE2T and FANCL; DNA binding assay with branched versus linear DNA substrates |
The Journal of biological chemistry |
High |
19589784
|
| 2014 |
Crystal structure of the FANCL RING domain–Ube2T complex reveals an extensive network of specific electrostatic and hydrophobic interactions that determine selective E2 recognition; these specific contacts are required for Ube2T selection over other E2 enzymes by FANCL. |
X-ray crystallography of FANCL RING–Ube2T complex; mutagenesis to test interaction specificity; E2 selection assays |
Structure (London, England : 1993) |
High |
24389026
|
| 2011 |
The central UBC-RWD (URD/DRWD) domain of human FANCL is structurally conserved with Drosophila FANCL and is responsible for substrate (FANCD2 and FANCI) binding; specific residues in this domain are required for substrate binding and catalytic function; the RING domain mediates E2 (Ube2T) binding. |
Crystal structure of central domain of human FANCL; comparative structural analysis with Drosophila FANCL; mutational analysis; in vitro binding assays with FANCD2, FANCI, and Ube2T |
The Journal of biological chemistry |
High |
21775430
|
| 2007 |
FANCL interacts directly with FANCD2 (via its PHD domain) and is required for FANCD2 monoubiquitination and focus formation in cells; FANCL-deficient and FANCD2-deficient cells show identical quantitative defects in homologous recombination repair of I-SceI-induced chromosomal breaks, establishing FANCL and FANCD2 monoubiquitination in the HR repair pathway. |
Yeast two-hybrid, co-immunoprecipitation in 293T cells, FANCL-disrupted DT40 cells, I-SceI HR repair assay, knock-in mutation of FANCD2 monoubiquitination site (K563R) |
Genes to cells : devoted to molecular & cellular mechanisms |
High |
17352736
|
| 2006 |
Drosophila FANCL is required for FANCD2 monoubiquitination in a linear pathway (FANCL upstream of FANCD2), and knockdown of either FANCD2 or FANCL causes specific hypersensitivity to DNA cross-linking agents. |
RNAi knockdown in Drosophila; cross-linking agent sensitivity assays; genetic epistasis analysis |
DNA repair |
Medium |
16860002
|
| 2010 |
UBE2W ubiquitin-conjugating enzyme interacts with FANCL through the PHD domain, catalyzes monoubiquitination of the FANCL PHD domain in vitro, and promotes FANCD2 monoubiquitination in cells (specifically UV-induced but not MMC-induced), revealing a regulatory mechanism distinct from UBE2T. |
In vitro ubiquitination assay; co-immunoprecipitation; domain mapping; siRNA knockdown; overexpression in cells |
Molecules and cells |
Medium |
21229326
|
| 2012 |
FANCL ubiquitinates β-catenin with atypical Lys-11 ubiquitin chain extensions that have non-proteolytic functions, enhancing β-catenin nuclear activity and transcription of Wnt targets (c-Myc and Cyclin D1); FANCL-deficient cells show diminished β-catenin activation and reduced multilineage progenitor expansion. |
Co-immunoprecipitation, in vitro and in vivo ubiquitination assays, LEF-TCF reporter assay, siRNA knockdown in CD34+ stem/progenitor cells |
Blood |
Medium |
22653977
|
| 2015 |
The ELF (E2-like fold) domain of FANCL mediates a non-covalent interaction with ubiquitin via the canonical Ile44 patch on ubiquitin and a functionally conserved patch on FANCL; while not required for in vitro FANCD2 monoubiquitination or E2/core complex interactions, the ELF domain is required for efficient DNA damage-induced FANCD2 monoubiquitination in vertebrate cells. |
NMR and binding assays to map ubiquitin–ELF interaction; mutagenesis of interaction surface; in vitro ubiquitination assay; cellular complementation assay in vertebrate cells |
The Journal of biological chemistry |
High |
26149689
|
| 2013 |
FANCL is constitutively targeted for proteasomal degradation via Lys-48-linked polyubiquitination; the ELF domain may direct this ubiquitination; FANCL is stabilized by Akt1 activation (which reduces FANCL polyubiquitination) and by complex formation with axin1 when GSK-3β is overexpressed, linking PI3K/Akt signaling to FANCL protein stability. |
Proteasome inhibitor treatment, Lys-48 ubiquitin chain biochemistry, N-terminal deletion mutagenesis, constitutively active Akt overexpression, 2D-PAGE of phospho-FANCL isoforms |
Molecular biology of the cell |
Medium |
23783032
|
| 2017 |
Arsenite (As3+) binds directly to the PHD/RING finger domain of FANCL in vitro and in cells, inhibiting FANCD2 ubiquitination and chromatin recruitment, and sensitizing cells to DNA interstrand cross-linking agents. |
In vitro binding assay, cellular FANCD2 monoubiquitination assay, chromatin fractionation, immunofluorescence for FANCD2 foci, clonogenic survival assay |
ACS chemical biology |
Medium |
28535027
|
| 2019 |
A high-throughput screen identified a small-molecule inhibitor of UBE2T/FANCL-mediated FANCD2 monoubiquitylation that sensitizes cancer cells to the DNA cross-linking agent carboplatin. |
High-throughput biochemical screen, in vitro ubiquitylation assay, cellular sensitization assay with carboplatin |
ACS chemical biology |
Medium |
31525021
|
| 2010 |
In zebrafish, fancl is expressed in developing germ cells during sex determination; fancl mutation causes Tp53-mediated germ cell apoptosis, loss of oocytes through meiosis, and consequent female-to-male sex reversal; introduction of a tp53 mutation into fancl mutants rescues sex reversal by reducing germ cell apoptosis. |
Genetic screen, caspase-3 immunoassay, in situ hybridization for gonadal markers, double-mutant (fancl;tp53) epistasis analysis |
PLoS genetics |
High |
20661450
|
| 2020 |
Two frameshift mutations in FANCL found in POI patients cause cytoplasmic retention of FANCL protein (normally nuclear), impaired ubiquitin-ligase activity, and compromised DNA repair after mitomycin C treatment, demonstrating haploinsufficiency for ovarian function. |
Subcellular localization by fluorescence microscopy, in vitro ubiquitination assay, DNA repair assay (mitomycin C sensitivity), protein expression analysis |
Human mutation |
Medium |
32048394
|
| 2022 |
FANCL protein localizes to mitochondria under basal and mitochondrial stress conditions; FANCL knockout sensitizes cells to mitochondrial stress and impairs Parkin-mediated mitophagy; re-expression of either wild-type FANCL or a ubiquitin-ligase-dead mutant (C307A) rescues this defect, indicating FANCL supports mitophagy in a ubiquitin ligase-independent manner. |
CRISPR/Cas9 knockout, subcellular fractionation/mitochondrial localization, mitophagy assay (Parkin overexpression + OA treatment), rescue with wild-type and catalytic mutant FANCL |
Biochimica et biophysica acta. Molecular basis of disease |
Medium |
35644338
|
| 2026 |
A murine allele mimicking a patient FA mutation (FanclTATΔ, 3-bp deletion removing the catalytic cysteine in the RING domain) retains FA core complex structural integrity but lacks FANCD2 monoubiquitination activity; homozygous mice develop classical FA features (infertility, craniofacial anomalies, DNA damage hypersensitivity, HSC loss); CRISPR-Cas9 or prime editing to correct the mutation restores FANCD2 monoubiquitination and DNA damage resistance, demonstrating that RING E3 ligase activity of the FA core complex is the essential function explaining FA developmental and hematopoietic phenotypes. |
Mouse knock-in model (FanclTATΔ), biochemical FANCD2 monoubiquitination assay, structural integrity analysis, phenotypic characterization, CRISPR-Cas9 and prime editing correction |
Blood advances |
High |
41259745
|
| 2020 |
Biochemical and structural analysis of 17 FANCL URD domain variants (from cancer patients and FA patients) reveals that the C-terminal lobe of the URD domain is critical for FANCL activity; specific mutations (I136V, L154S, W212A, L214A, R221W, R221C, V287G) destabilize FANCL, while others (E217K, T224K, M247V and the hydrophobic patch) cause catalytic defects in FANCD2 ubiquitination without gross destabilization. |
Recombinant protein expression, thermal shift assay, in vitro ubiquitination assay, FANCD2 binding assay, cellular ICL-agent sensitivity assay |
Bioscience reports |
Medium |
32420600
|