| 1999 |
BNIP-2 is a substrate of FGF receptor-1 (FGFR1) tyrosine kinase; FGFR1 phosphorylates BNIP-2 on tyrosine residues both in cells and in vitro, and tyrosine phosphorylation of BNIP-2 prevents its binding to Cdc42GAP and abolishes its GAP-like activity toward Cdc42. |
Yeast two-hybrid screen, co-immunoprecipitation 'capture' experiments with kinase-dead FGFR1, in vitro kinase assay with recombinant BNIP-2 and active FGFR1, GST pulldown, GTPase activity assay |
The Journal of biological chemistry |
High |
10551883
|
| 2000 |
The C-terminal BCH (BNIP-2 and Cdc42GAP Homology) domain of BNIP-2 binds Cdc42 and stimulates its GTPase activity via a novel arginine-patch motif (Arg-235 and Arg-238); site-directed mutagenesis of these arginines abolishes GAP activity without affecting Cdc42 binding, and a sequence 288EYV290 on BNIP-2 plus the Switch I and Rho Insert region on Cdc42 mediate binding. |
GST pulldown, GTPase activity assay, site-directed mutagenesis, deletion studies |
The Journal of biological chemistry |
High |
10799524
|
| 2000 |
The BCH domain of BNIP-2 mediates homophilic (BNIP-2:BNIP-2) and heterophilic (BNIP-2:Cdc42GAP) protein-protein interactions; the region 217RRKMP221 is the major BCH–BCH interaction site, distinct from the arginine-patch required for GAP activity and the Cdc42-binding sequence 288EYV290. |
GST pulldown, co-immunoprecipitation, yeast two-hybrid, deletion mutagenesis, molecular modeling |
The Journal of biological chemistry |
High |
10954711
|
| 2001 |
The BCH domain of BNIP-Salpha (a BNIP-2 homolog) is a novel apoptosis-inducing sequence; expression of the full BCH domain induces apoptosis, and deletion of the homophilic interaction motif within the BCH domain abrogates this pro-apoptotic effect. |
Overexpression in cells, deletion mutagenesis, apoptosis assays, co-immunoprecipitation |
The Journal of biological chemistry |
Medium |
11741952
|
| 2003 |
BPGAP1, a novel RhoGAP containing a BCH domain, forms homophilic and heterophilic complexes with other BCH-domain proteins including BNIP-2 via their BCH domains, as shown by pulldown and co-immunoprecipitation; BPGAP1 selectively stimulates RhoA GTPase activity in vivo and induces pseudopodia and cell migration in MCF7 cells. |
GST pulldown, co-immunoprecipitation, fluorescence microscopy, cell migration assay, dominant-negative GTPase coexpression |
The Journal of biological chemistry |
Medium |
12944407
|
| 2005 |
BNIP-2 induces cell elongation and membrane protrusions via its BCH domain by binding Cdc42 through a unique motif 285VPMEYVGI292; cells expressing BNIP-2 mutants lacking this motif fail to produce morphological changes, and the effect is blocked by dominant-negative Cdc42. |
Transient overexpression, deletion/mutagenesis, GST pulldown, dominant-negative GTPase coexpression, fluorescence microscopy |
Experimental cell research |
High |
15652341
|
| 2006 |
BNIP-Salpha induces cell rounding and apoptosis by binding RhoA via BCH domain residues 133-177 (overlapping a RhoA switch I homology region and a REM class I RhoA-binding motif), displacing p50RhoGAP/Cdc42GAP from RhoA and thereby restoring RhoA activation; dominant-negative RhoA prevents cell rounding and apoptosis. |
Overexpression and mutagenesis, co-immunoprecipitation, dominant-negative GTPase coexpression, cell morphology and apoptosis assays |
Oncogene |
High |
16331259
|
| 2006 |
Brain-specific BNIP-H/Caytaxin (a BNIP-2 family member) directly binds kidney-type glutaminase (KGA), relocalizes KGA from mitochondria to neurite terminals, and reduces steady-state glutamate levels by inhibiting KGA enzyme activity. |
Protein precipitation, MALDI-MS, co-immunoprecipitation with endogenous proteins, GST pulldown, immunohistochemistry, glutamate measurement in PC12 cells |
Journal of cell science |
High |
16899818
|
| 2007 |
BNIP-2 and BNIP-XL are cleaved by caspases during apoptosis; the caspase cleavage sites on BNIP-2 are located within its N-terminal EF-hand motif, releasing BCH-domain-containing fragments proposed to contribute to pro-apoptotic activity. |
In vitro caspase cleavage assay, cell-based apoptosis assays, site mapping by deletion/mutagenesis |
Biochemical and biophysical research communications |
Medium |
17961507
|
| 2008 |
During myoblast differentiation, BNIP-2 interacts with the cell surface receptor Cdo and the scaffold protein JLP (which also binds p38α/β MAPK), linking Cdo to Cdc42 activation; gain- and loss-of-function experiments show that the Cdo–BNIP-2 interaction stimulates Cdc42 activity, which in turn promotes p38α/β activity and myogenic differentiation. |
Co-immunoprecipitation, gain- and loss-of-function (siRNA knockdown, overexpression), p38 activity assay, Cdc42 pull-down activity assay, myogenic differentiation assays |
The Journal of cell biology |
High |
18678706
|
| 2008 |
BNIPXL (BNIP2 Extra Long), the full contig of BMCC1, uses its BCH domain to interact with specific conformers of RhoA (fast-cycling F30L and dominant-negative T19N, but not constitutively active mutants) and with the catalytic DH-PH domains of the RhoGEF Lbc; overexpression of BNIPXL reduces active RhoA levels and inhibits Lbc-induced oncogenic transformation, while knockdown has the reverse effect. |
Co-immunoprecipitation, GST pulldown, RhoA activity assay, transformation assay, siRNA knockdown |
Journal of cell science |
High |
18445682
|
| 2010 |
BNIP-2 is cleaved by granzyme B at site IEAD28 during NK cell-mediated killing of tumor cells; cleavage is caspase-independent, occurs on endogenous BNIP-2, and both full-length and the granzyme B-cleaved truncated form of BNIP-2 are pro-apoptotic and trigger subsequent caspase-dependent cleavage of BNIP-2 at a distinct site. |
In vitro granzyme B cleavage assay with recombinant BNIP-2, NK cell cytotoxicity assay with endogenous BNIP-2, site mutagenesis, siRNA knockdown, apoptosis assays |
The Biochemical journal |
High |
20704564
|
| 2010 |
The BCH domain of p50RhoGAP/Cdc42GAP sequesters RhoA from inactivation by the adjacent GAP domain in cis; the BCH domain binds RhoA regardless of nucleotide state (GDP or GTP), and a RhoA-binding motif (residues 85-120) plus an intramolecular interaction motif (residues 169-197) within the BCH domain are both required for full suppression of GAP activity; deletion of the BCH domain enhances GAP activity and causes cell rounding prevented by active RhoA. |
BCH domain deletion mutants, site-directed mutagenesis, cell morphology assays, dominant-active RhoA rescue, co-immunoprecipitation, subcellular localization studies |
Molecular biology of the cell |
High |
20660160
|
| 2014 |
KIF5B (kinesin-1 heavy chain) directly interacts with BNIP-2 via BNIP-2's BCH domain (binding both motor and tail domains of KIF5B); KIF5B mediates anterograde endosomal transport of BNIP-2 along microtubules, and KIF5B knockdown causes aberrant BNIP-2 aggregation and impairs p38MAPK activation and myogenic differentiation. |
Co-immunoprecipitation, far-Western blot, live-cell microscopy with organelle markers, dominant-negative KIF5B, siRNA knockdown, p38 activity assay, myogenic differentiation assays |
Molecular biology of the cell |
High |
25378581
|
| 2014 |
The CRAL-TRIO/BCH domain of BNIP-2 specifically binds phosphatidylserine; this lipid interaction is required for vesicular localization of BNIP-2 (to Golgi, early and recycling endosomes, mitochondria) and for its ability to induce cell elongation and processes. BNIP-2 also interacts with kinesin light chains (KLCs) via a conserved WED motif in its N-terminal region, and KLC interaction plus kinesin-1 transport are required for BNIP-2-induced cell morphological changes. |
Lipid-binding assay, co-immunoprecipitation with KLC, subcellular fractionation, organelle marker colocalization, live imaging for transport speed, mutagenesis of WED motif and CRAL-TRIO domain |
Genes to cells |
High |
25472445
|
| 2014 |
Granzyme B cleaves BNIP-2 at the IEAD28 tetrapeptide motif; extended substrate context beyond P4-P1 (particularly P1' and P3' positions) determines differential cleavage efficiency between mouse and human granzyme B, with murine granzyme B cleaving BNIP-2 more efficiently than human granzyme B despite identical IEAD tetrapeptide. |
In vitro kinetic degradome analysis, site-directed mutagenesis of primed-site residues, comparative cleavage assays |
BMC biochemistry |
Medium |
25208769
|
| 2020 |
BNIP-2 scaffolds GEF-H1 and RhoA on microtubules via binding to both; upon microtubule disassembly, BNIP-2–GEF-H1 interaction increases and BNIP-2 facilitates GEF-H1-driven RhoA activation. Depletion of BNIP-2 in MDA-MB-231 breast cancer cells decreases RhoA activity, uncouples RhoA–GEF-H1 interaction, and promotes cell migration. BNIP-2 also traffics with kinesin-1 on microtubules. |
siRNA knockdown, co-immunoprecipitation, RhoA activity assay, nocodazole-induced microtubule disassembly, live-cell migration assay, proximity ligation assay |
Science advances |
High |
32789168
|
| 2022 |
BNIP-2 promotes cardiomyoblast differentiation by scaffolding LATS1 to phosphorylate and inactivate YAP (increasing cytosolic YAP retention), and this requires BNIP-2-mediated activation of cellular contractility (RhoA/Myosin II). Turbo-ID proximity labeling, super-resolution imaging, and biochemical pulldown together demonstrate the BNIP-2–LATS1 scaffolding interaction. |
Turbo-ID proximity labeling, super-resolution microscopy, biochemical pulldown, siRNA knockdown/overexpression, YAP phosphorylation assay, cardiomyoblast differentiation assay (cTnT, Myl2 expression) |
Advanced science |
High |
35975420
|