| 2009 |
NKAP functions as a transcriptional repressor by associating with the histone deacetylase HDAC3 and the Notch corepressor complex, and is part of a DNA-binding complex as demonstrated by chromatin immunoprecipitation. Loss of NKAP in T cells blocks alphabeta T cell development and causes 8-20-fold upregulation of Notch target genes Hes1, Deltex1, and CD25. |
Genetic complementation screen, co-immunoprecipitation, chromatin immunoprecipitation, conditional knockout (Lck-cre) |
Immunity |
High |
19409814
|
| 2011 |
NKAP is required for post-selection T cell maturation and acquisition of functional competency; loss of NKAP in CD4-cre conditional knockout mice causes a cell-intrinsic block in peripheral T cell maturation that is not rescued by a Bcl-2 transgene, indicating the defect is not simply in cell survival. |
Conditional knockout (CD4-cre), Bcl-2 transgene rescue experiment, flow cytometry |
The Journal of experimental medicine |
High |
21624937
|
| 2013 |
NKAP is required for iNKT cell development; deletion of NKAP-associated protein HDAC3 causes a similar block, indicating NKAP and HDAC3 functionally interact to control iNKT cell development. The block is cell-intrinsic and not due to decreased survival or failure to rearrange the invariant TCR-alpha chain. |
Conditional knockout (CD4-cre), TCR transgene rescue, HDAC3 conditional knockout, flow cytometry |
Nature communications |
High |
23481390
|
| 2013 |
NKAP localizes to nuclear speckles (with the basic domain required for this localization), binds RNA (both spliced mRNA and unspliced pre-mRNA), associates with RNA-binding proteins and splicing factors including FUS/TLS (through the RS domain of NKAP and RGG1/RGG3 domains of FUS/TLS), and associates with U1, U4, and U5 snRNAs. NKAP knockdown leads to increased pre-mRNA percentage, establishing a role in RNA splicing. |
Immunofluorescence, deletion analysis, pull-down assays, in vitro splicing assays, CLIP-seq, Co-IP |
Nucleic acids research |
High |
24353314
|
| 2010 |
NKAP is required for adult hematopoietic stem cell (HSC) maintenance and survival; NKAP deletion leads to decreased HSC proliferation and increased apoptosis associated with increased expression of cyclin-dependent kinase inhibitors p21Cip1/Waf1 and p19Ink4d. This failure is cell-intrinsic as demonstrated by radiation chimera experiments. |
Conditional knockout (Mx1-cre), mixed radiation chimeras, flow cytometry, gene expression analysis |
Blood |
High |
20610818
|
| 2016 |
NKAP is SUMOylated predominantly during mitosis, and this SUMOylation is required for NKAP to bind CENP-E. A SUMOylation-deficient NKAP mutant cannot support CENP-E localization to kinetochores or proper chromosome alignment. Bub3 recruits NKAP to stabilize the binding of CENP-E to BubR1 at kinetochores. NKAP knockdown causes chromosome misalignment, prometaphase arrest, and aneuploidy. |
Knockdown, SUMOylation-deficient mutant expression, co-immunoprecipitation, immunofluorescence, live imaging, kinetochore fractionation |
Nature communications |
High |
27694884
|
| 2016 |
NKAP regulates iNKT cell proliferation and differentiation into NKT17 cells; NKAP-specific deletion in iNKT cells causes defective proliferation (not rescued by Bcl-xL overexpression) and failure of NKT17 differentiation; the NKT17 defect is rescued by promyelocytic leukemia zinc finger (PLZF) transgene, placing NKAP upstream of PLZF in NKT17 differentiation. |
Conditional knockout, Bcl-xL transgene rescue, PLZF transgene rescue, flow cytometry |
Journal of immunology |
Medium |
27183586
|
| 2018 |
NKAP-deficient regulatory T cells are eliminated in the periphery after thymic egress through complement-mediated attack in a cell-intrinsic manner, similar to the mechanism by which NKAP-deficient conventional T cells fail maturation. |
Conditional knockout (Foxp3-YFP-cre), complement deposition assays, flow cytometry |
Journal of autoimmunity |
Medium |
29366602
|
| 2019 |
The physical interaction between NKAP and HDAC3, mapped to NKAP residues Y352 and F347 (alanine substitution at Y352 abrogates binding), is critical for T cell maturation, Treg maturation, and iNKT cell development. NKAP(Y352A) recapitulates NKAP deficiency in these lineages but does not impair proliferation of murine embryonic fibroblasts, indicating NKAP functions in different complexes in different cell types. |
Serial truncation and alanine scanning, conditional deletion/re-expression transgenic system in vivo, Co-IP |
ImmunoHorizons / Journal of immunology |
High |
30804042 31387873
|
| 2019 |
T cell maturation confers resistance to complement targeting by MBL2 (lectin pathway); NKAP-deficient T cells remain susceptible to complement (MBL2-dependent C3 deposition) but peripheral lymphopenia is not fully restored by genetic ablation of lectin and classical complement pathways, indicating complement is not the primary cause of T cell loss. Instead, accumulation of lipid peroxides (consistent with ferroptosis) was observed in NKAP-deficient T cells. |
Genetic ablation of complement pathways (MBL1, MBL2 KO, C4 KO), complement deposition assays, lipid peroxide measurement |
Journal of immunology |
Medium |
31175160
|
| 2019 |
NKAP promotes glioma growth by directly binding to the Notch1 promoter and trans-activating Notch1 transcription, which in turn increases SDF-1 and M-CSF secretion to drive tumor-associated macrophage recruitment and polarization. |
ChIP assay, RNA sequencing, luciferase reporter assay, siRNA knockdown, xenograft models |
Journal of experimental & clinical cancer research |
Medium |
31277684
|
| 2019 |
NKAP deficiency in hematopoietic progenitors leads to a senescent phenotype with altered expression of cell cycle regulators including p16INK4a; combined deficiency of p16INK4a and p21Cip1 does not reverse hematopoietic failure in vivo but shifts the consequence of NKAP deficiency from senescence to apoptosis in ex vivo cultures. |
Inducible conditional knockout (Mx1-cre), ex vivo cultures, double CDKI-deficient mice, senescence assays |
Frontiers in cell and developmental biology |
Medium |
31632967
|
| 2021 |
MARCKS directly binds NKAP protein; upon cigarette smoke-induced phosphorylation of MARCKS at Ser159 and Ser163, the MARCKS-NKAP interaction is inhibited, leading to activation of NF-κB signaling in lung cancer cells. |
Functional proteomics (MARCKS interactome), co-immunoprecipitation, phosphomimetic mutants, NF-κB reporter assays |
Theranostics |
Medium |
33754052
|
| 2022 |
NKAP acts as a ferroptosis suppressor in glioblastoma cells by binding to m6A-modified SLC7A11 transcript (via the RGAC/RGACH motif) in an METTL3-dependent manner, then recruiting splicing factor SFPQ to promote TTS splicing and retention of the last exon of SLC7A11 mRNA, resulting in SLC7A11 maturation and upregulation. |
RNA immunoprecipitation (RIP), Co-IP, RNA-seq, Mass Spectrometry, siRNA knockdown, m6A inhibitor treatment, METTL3 knockdown, xenograft models |
Cell death & disease |
Medium |
35064112
|
| 2023 |
NKAP prevents R-loop accumulation and maintains genome integrity by forming a protein complex with HDAC3. NKAP depletion causes transcription-dependent R-loop accumulation, DNA damage, and replication fork defects. HDAC3 stabilizes NKAP protein independently of its deacetylase activity. R-loops induced by NKAP or HDAC3 depletion are processed into DNA double-strand breaks by XPF and XPG endonucleases. NKAP also maintains RNA polymerase II pausing to prevent R-loop formation. |
Protein complex analysis, siRNA knockdown, R-loop detection (S9.6 antibody), DNA damage assays, replication fork assays, XPF/XPG endonuclease knockout, RNA Pol II ChIP |
Cell death and differentiation |
High |
37322264
|
| 2019 |
Missense mutations clustered in the C-terminal region of NKAP (where it interacts with HDAC3 and post-catalytic spliceosomal complex proteins) cause developmental defects; C-terminally truncated NKAP in zebrafish causes severe developmental defects, and affected human cases show downregulation of long genes with higher exon numbers as a transcriptome signature. |
Zebrafish nkap C-terminal truncation mutant, transcriptome analysis of patient samples, domain-interaction mapping |
American journal of human genetics |
Medium |
31587868
|
| 2024 |
NKAP p.R330C mutation disrupts intra-nuclear distribution of NKAP protein and impairs its interaction with HDAC3, leading to dysregulation of cardiac morphogenesis gene transcription (DHRS3, DNAH11, JAG1) in HEK293T cells. |
Transfection of NKAP mutant in HEK293T, immunofluorescence (intra-nuclear distribution), Co-IP (NKAP-HDAC3 interaction), RT-qPCR (target gene transcription) |
Journal of cellular and molecular medicine |
Medium |
38647244
|
| 2024 |
The lncRNA GRAS1 directly interacts with NKAP protein (identified by RAP-MS), and GRAS1 knockdown leads to proteasome-dependent degradation of NKAP protein, resulting in DNA damage and cell death that can be mitigated by NKAP overexpression. |
RNA antisense purification and mass spectrometry (RAP-MS), siRNA knockdown, proteasome inhibitor treatment, overexpression rescue |
bioRxivpreprint |
Low |
38645172
|