| 2008 |
LARP7 is a stable, core component of the 7SK snRNP that binds 7SK snRNA and is required for maintaining steady-state 7SK levels; immunodepletion of LARP7 co-depletes 7SK regardless of P-TEFb, HEXIM1, or hnRNP A1 association, and siRNA knockdown of LARP7 decreases 7SK levels, increases free P-TEFb, and increases Tat transactivation of HIV-1 LTR. |
Glycerol gradient sedimentation, immunodepletion, siRNA knockdown with functional readouts (P-TEFb levels, Tat transactivation assay) |
Nucleic acids research |
High |
18281698
|
| 2008 |
LARP7 binds the highly conserved 3'-terminal U-rich stretch of 7SK RNA, is an integral part of the 7SK RNP, remains associated with 7SK upon P-TEFb release, and acts as a negative transcriptional regulator of RNA Pol II genes through the 7SK RNP system; siRNA-mediated reduction of LARP7 enhances transcription from cellular Pol II promoters and the TAT-dependent HIV-1 promoter. |
Co-immunoprecipitation, RNA interference, transcription reporter assays |
EMBO reports |
High |
18483487
|
| 2013 |
Larp7 binds to the 3'-terminal hairpin and following U-rich tail of 7SK snRNA, and MePCE interacts with the 5'-terminal helix-tail motif; binding of Larp7 to 7SK is a prerequisite for in vivo recruitment of P-TEFb to the 7SK snRNP, indicating Larp7 directly participates in P-TEFb regulation beyond merely stabilizing 7SK. |
In vivo RNA-protein interaction assays, mutational analysis of 7SK RNA elements |
Nucleic acids research |
High |
23471002
|
| 2015 |
Crystal structure of the LARP7 La module (La motif + RRM1) bound to 3'-terminal uridines of 7SK shows the penultimate uridine is tethered by both domains; a second C-terminal RRM domain binds the apical loop of the 7SK 3' hairpin, and together the N- and C-terminal domains stabilize 7SK in a closed structure by joining conserved 5'-end sequences with the foot of the 3' hairpin. |
X-ray crystallography, binding assays, footprinting, small-angle X-ray scattering (SAXS) |
Nucleic acids research |
High |
25753663
|
| 2014 |
Decreased LARP7 and 7SK levels redistribute P-TEFb to the transcriptionally active super elongation complex, resulting in increased transcription of EMT transcription factors (Slug, FOXC2, ZEB2, Twist1), promoting breast cancer EMT, invasion, and metastasis; LARP7 suppresses P-TEFb activity to inhibit these processes. |
siRNA knockdown, overexpression, invasion/migration assays, gene expression analysis |
eLife |
High |
25053741
|
| 2018 |
Crystal structure (2.2 Å) of human Larp7 xRRM (C-terminal atypical RRM) bound to 7SK stem-loop 4 reveals a unique binding interface; the xRRM is preordered to bind a flexible loop 4; mutagenesis and ITC confirm specific contacts; combined with the La module structure, a model for full Larp7 binding to 7SK 3' end and mechanism for 7SK RNP assembly is proposed. |
X-ray crystallography (2.2 Å), NMR 13C spin relaxation, isothermal titration calorimetry, mutagenesis |
Proceedings of the National Academy of Sciences of the United States of America |
High |
29946027
|
| 2018 |
Fission yeast LARP7 ortholog Lar7 binds telomerase RNA via conserved RNA-recognition motifs to protect it from exosomal degradation, stabilizes the association of telomerase RNA with the LSm2-8 complex and telomerase reverse transcriptase, and remains a component of the mature telomerase complex required for telomerase localization to the telomere. |
Genetic deletion, RNA-protein interaction assays, telomere localization assays (ortholog study in S. pombe) |
Nature communications |
High |
29422501
|
| 2018 |
Fission yeast LARP7-like protein Pof8 uses its C-terminal xRRM domain to promote assembly of RNA Pol II-encoded telomerase RNA with TERT, and contributes to repression of noncoding RNA transcription at telomeres. |
Genetic analysis, domain deletion/mutation studies, RNA-protein interaction assays (ortholog study in S. pombe) |
Nature communications |
High |
29422503
|
| 2016 |
LARP7 silencing in human cancer cells reduces telomerase enzymatic activity and causes progressive telomere shortening; Alazami syndrome patients with LARP7 loss-of-function show very short lymphocyte telomeres. |
siRNA knockdown, telomerase activity assay (TRAP), telomere length measurement, patient cohort analysis |
BMC genomics |
Medium |
27766953
|
| 2020 |
LARP7 physically connects the spliceosomal U6 snRNA with a distinct subset of box C/D snoRNAs guiding U6 2'-O-methylation; depletion of LARP7 severely compromises these U6 modifications and causes alternative splicing perturbations; Alazami syndrome patients carrying a LARP7 mutation show defective U6 2'-O-methylation. |
Co-immunoprecipitation, RNA modification analysis, transcriptome-wide splicing analysis, patient samples |
Molecular cell |
High |
32017898
|
| 2020 |
LARP7 promotes loading of U6 snRNA onto box C/D snoRNP, facilitating U6 2'-O-methylation; ablation of LARP7 in mouse male germline causes defective U6 2'-O-methylation, massive alterations in pre-mRNA splicing, and spermatogenic failure, rescued by wild-type LARP7 but not a U6-loading-deficient LARP7 mutant. |
Conditional knockout mouse, rescue with wild-type vs. mutant LARP7, U6 modification analysis, splicing transcriptome analysis |
Molecular cell |
High |
32017896
|
| 2021 |
Cardiac-specific LARP7 knockout causes defective mitochondrial biogenesis, impaired oxidative phosphorylation, elevated oxidative stress, and heart failure; mechanistically, LARP7 loss reduces SIRT1 stability and deacetylase activity, impairing SIRT1-mediated transcription of oxidative phosphorylation and energy metabolism genes. Reactive oxygen species activate ATM kinase, which promotes LARP7 ubiquitination and degradation. |
Cardiac-specific and global KO mice, AAV9-mediated LARP7 overexpression, ATM inhibitor treatment, mitochondrial function assays, SIRT1 activity assays |
Circulation |
High |
33663221
|
| 2021 |
DNA damage-mediated ATM activation triggers extracellular shuttling and downregulation of LARP7, which dampens SIRT1 deacetylase activity, enhances p53 and NF-κB (p65) transcriptional activity by augmenting their acetylation, accelerating cellular senescence; LARP7 deletion leads to senescent cell accumulation and premature aging in rodent model. |
LARP7 deletion in rodent model, SIRT1 deacetylase activity assays, acetylation analysis of p53/NF-κB, cellular senescence assays |
Cell reports |
High |
34818543
|
| 2019 |
Legionella AnkH effector interacts with host nuclear LARP7 in the host cell nucleus, partially impeding interactions of 7SK snRNP components with LARP7 and interfering with Pol II transcriptional elongation; a substitution in the third ankyrin repeat of AnkH diminishes LARP7-AnkH interaction and phenocopies ankH null mutant defect in intracellular growth. |
Co-immunoprecipitation, crystal structure of AnkH, site-directed mutagenesis, bacterial infection assays |
mBio |
Medium |
31455655
|
| 2015 |
In zebrafish, Larp7 knockdown de-represses Cdk9 activity, increases phosphorylation of Ser2 on the C-terminal domain of RNA Pol II, and increases cardiomyocyte proliferation; Larp7 knockdown rescues the structural and functional cardiac phenotype caused by Cdk9 knockdown, placing Larp7 upstream of Cdk9/P-TEFb-mediated Pol II Ser2 phosphorylation in cardiomyocyte proliferation. |
Morpholino knockdown in zebrafish, epistasis analysis, Pol II CTD phosphorylation assay, cardiomyocyte proliferation and cardiac function readouts |
Journal of cell science |
Medium |
26542022
|
| 2022 |
MCTS1 protein interacts with LARP7 (confirmed by reciprocal Co-IP, predominantly in cytoplasm), increases LARP7 protein half-life, and reduces LARP7 poly-ubiquitination, indicating MCTS1 stabilizes LARP7 by protecting it from proteasomal degradation. |
Co-immunoprecipitation, cycloheximide chase assay, ubiquitination Co-IP |
Clinical and experimental pharmacology & physiology |
Medium |
35274760
|
| 2024 |
LARP7 interacts with SIRT6 to maintain SIRT6 expression; combined cadmium and high-fat diet exposure reduces LARP7 levels via YTHDF2-mediated m6A-dependent degradation of Larp7 mRNA, disrupting LARP7-SIRT6 interaction and decreasing SIRT6 expression, leading to hippocampal neuronal senescence. |
RNA immunoprecipitation, RNA stability assays, Co-IP, Larp7 overexpression rescue, YTHDF2 siRNA |
Journal of hazardous materials |
Medium |
39002485
|
| 2024 |
LARP7 and MePCE are involved in the early stage of human telomerase RNA (hTR) biogenesis; they bind 3'-extended precursor forms and their binding is destabilized upon mature hTR production; LARP7/MePCE depletion inhibits conversion of the 3'-extended short form to mature hTR and causes cytoplasmic accumulation of hTR, resulting in telomere shortening. |
Biochemical fractionation, RNA binding assays, depletion experiments, telomere length assays |
Nature communications |
Medium |
39009594
|
| 2025 |
HIV-1 infection triggers liquid-liquid phase separation of LARP7; Tat is incorporated into HIV-1-induced LARP7 condensates; conserved lysine residues in the intrinsically disordered region of LARP7 are essential for both its phase separation and inhibition of Tat-mediated transcription, sequestering P-TEFb and Tat within condensates to restrain HIV-1 transcription. |
Live cell imaging of LARP7 condensates, mutagenesis of IDR lysine residues, Tat-mediated transcription assays |
EMBO reports |
Medium |
40113991
|
| 2025 |
LARP7's C-terminal domain interacts with the N-terminal domain of SIRT1 to enhance SIRT1 deacetylase activity, which facilitates NLRP3 deacetylation at K21/K22/K24, inhibiting inflammasome assembly and neuronal pyroptosis after ischemic stroke; domain deletion analysis and co-immunoprecipitation define the interaction interface. |
Co-immunoprecipitation, domain deletion analysis, proximity ligation assay, acetyl-proteomics, SIRT1 deacetylase activity assay, neuron-specific LARP7 KO mice |
Journal of neuroinflammation |
Medium |
41351020
|
| 2025 |
In Drosophila, loss of Larp7 (ortholog) impairs locomotion and reduces axonal growth at neuromuscular junctions; Larp7 functions autonomously in motoneurons to promote axogenesis; reducing P-TEFb abundance partially rescues locomotion and axonal growth defects, placing Larp7 upstream of P-TEFb in transcriptional regulation of long, GC-rich promoter genes in motoneurons. |
Genetic deletion in Drosophila, locomotion assays, NMJ morphology analysis, genetic epistasis with P-TEFb reduction, transcriptomic analysis of mutant motoneurons |
bioRxivpreprint |
Medium |
|
| 2025 |
LARP7 promotes replication fork slowing and RAD51-mediated replication fork reversal in response to agents that cause both replication and transcription stress (e.g., camptothecin, BET inhibitors), and supports homologous recombination at direct DSBs; this function is not required for HR in response to hydroxyurea (replication stress without transcription stress), indicating the mechanism is linked to LARP7's canonical 7SK-snRNP/Pol II regulatory function. |
LARP7 knockdown, DNA fiber assay (fork slowing), RAD51 recruitment assays, HR assays, epistasis with Pol II inhibition |
bioRxivpreprint |
Low |
|
| 2024 |
LARP7 interacts with STING in cardiomyocytes (particularly under high glucose conditions); high glucose causes LARP7 to translocate from the nucleus to the cytoplasm where it interacts with accumulated STING to inhibit STING degradation via the autophagy-lysosomal pathway, contributing to cardiac dysfunction. |
Co-immunoprecipitation, immunofluorescence (subcellular localization), adenovirus-mediated knockdown/overexpression, STING inhibitor treatment |
Frontiers in bioscience |
Low |
39082350
|
| 2024 |
LARP7 is required for meiotic sex chromosome inactivation (MSCI) in mice; in germline-specific Larp7-deficient spermatocytes, LARP7 normally localizes to the XY body; its absence leads to failure of sex chromosome transcriptional silencing, accumulation of H4K12ac and loss of H3K9me2 on XY chromatin, and arrest of spermatogenesis. |
Germline-specific Larp7 KO mice, immunofluorescence (XY body localization), histone modification analysis, transcriptional analysis of sex chromosome genes |
PloS one |
Medium |
39637191
|
| 2023 |
Full-length Tetrahymena LARP7 protein p65 structure in telomerase was determined by cryo-EM combined with NMR; three previously unknown helices are identified (one in NTD that binds the La module, one extending RRM1, one preceding xRRM2) that stabilize p65-TER interactions; the extended La module interacts with four 3' terminal U nucleotides and additionally with the TER pseudoknot, stem 1, and 5' end. |
Cryo-EM focused classification, NMR spectroscopy (Tetrahymena ortholog p65) |
Journal of molecular biology |
High |
37330293
|