| 2011 |
SIRT5 is an efficient protein lysine desuccinylase and demalonylase in vitro. The preference for succinyl and malonyl groups is explained by an arginine residue (Arg105) and tyrosine residue (Tyr102) in the acyl pocket of SIRT5. Deletion of SIRT5 in mice increases succinylation on carbamoyl phosphate synthase 1 (CPS1) in vivo. |
In vitro enzymatic assay, active-site mutagenesis (acyl pocket residues), mass spectrometry identification of substrates, SIRT5 knockout mouse |
Science |
High |
22076378
|
| 2009 |
SIRT5 localizes to the mitochondrial matrix, interacts with and deacetylates CPS1, and upregulates CPS1 enzymatic activity. During fasting, NAD+ in liver mitochondria increases, triggering SIRT5-mediated CPS1 deacetylation. SIRT5 KO mice fail to upregulate CPS1 activity and exhibit elevated blood ammonia during fasting. |
Co-immunoprecipitation, in vitro deacetylation assay, SIRT5 KO mouse phenotyping, subcellular fractionation/localization |
Cell |
High |
19410549
|
| 2013 |
Systematic profiling of the mammalian succinylome identified 2,565 succinylation sites on 779 proteins regulated by SIRT5. SIRT5 represses biochemical activity of pyruvate dehydrogenase complex and succinate dehydrogenase. A substantial fraction of SIRT5 is extramitochondrial (cytosolic and nuclear). |
Quantitative proteomics (affinity enrichment + mass spectrometry), enzymatic activity assays, subcellular fractionation |
Molecular Cell |
High |
23806337
|
| 2014 |
SIRT5 is a lysine deglutarylase. Proteome-wide analysis identified 683 glutarylation sites in 191 proteins. CPS1 is glutarylated and targeted by SIRT5 for deglutarylation; glutarylation suppresses CPS1 enzymatic activity in cell lines, mice, and a model of glutaric acidemia type I. |
Immunoblot, mass spectrometry, biochemical validation, SIRT5 enzymatic assay, cell lines and mouse models |
Cell Metabolism |
High |
24703693
|
| 2013 |
SIRT5 regulates succinylation of the rate-limiting ketogenic enzyme HMGCS2 both in vivo and in vitro. Mutation of hypersuccinylated residues K83 and K310 on HMGCS2 to glutamic acid strongly inhibits enzymatic activity. Loss of SIRT5 leads to accumulation of medium- and long-chain acylcarnitines and decreased β-hydroxybutyrate production in vivo. |
Label-free quantitative proteomics, in vitro desuccinylation assay, site-directed mutagenesis, SIRT5 KO mouse metabolic phenotyping |
Cell Metabolism |
High |
24315375
|
| 2015 |
SIRT5 is a global regulator of lysine malonylation. 1,137 malonyllysine sites across 430 proteins were identified, with 183 significantly increased in SIRT5 KO mice. Glycolysis is the top SIRT5-regulated pathway; glycolytic flux is diminished in SIRT5 KO primary hepatocytes. Substitution of malonylated K184 in GAPDH with glutamic acid suppresses its enzymatic activity. |
Affinity enrichment and label-free quantitative proteomics, SIRT5 KO mouse, primary hepatocyte glycolytic flux assays, site-directed mutagenesis of GAPDH K184 |
Molecular Cell |
High |
26073543
|
| 2008 |
SIRT5 can deacetylate cytochrome c (a mitochondrial intermembrane space protein) and can be translocated into both the mitochondrial intermembrane space and the matrix, suggesting localization contributes to substrate selection. |
In vitro deacetylation assay, mitochondrial import assay |
Journal of Molecular Biology |
Medium |
18680753
|
| 2010 |
SIRT5 overexpression in transgenic mice leads to increased CPS1 deacetylation and activation, and upregulates urea production in hepatocytes, confirming SIRT5-mediated CPS1 deacetylation and activation in vivo. |
SIRT5 transgenic mouse model, 2D electrophoresis, enzymatic activity assay, urea production assay |
Biochemical and Biophysical Research Communications |
Medium |
20097174
|
| 2013 |
SOD1 is succinylated, which decreases its activity. SIRT5 binds to, desuccinylates, and activates SOD1, and SOD1-mediated ROS reduction is increased when SIRT5 is co-expressed. Mutation of the SOD1 succinylation site inhibits lung tumor cell growth. |
Co-immunoprecipitation, in vitro desuccinylation assay, enzymatic activity assay, cell growth assay with succinylation-site mutant |
Biochemical and Biophysical Research Communications |
Medium |
24140062
|
| 2016 |
SIRT5 desuccinylates IDH2 and deglutarylates G6PD, activating both NADPH-producing enzymes. SIRT5 knockdown/knockout leads to high cellular ROS, decreased NADPH, lower GSH, and increased susceptibility to oxidative stress. |
In vitro deacylation assay, enzymatic activity assays (IDH2, G6PD), siRNA knockdown, SIRT5 KO cells, NADPH/GSH measurement |
EMBO Reports |
High |
27113762
|
| 2016 |
Succinyl-CoA is the most abundant acyl-CoA in the heart. SIRT5 deletion leads to predominant accumulation of lysine succinylation in cardiac proteins. ECHA (involved in fatty acid oxidation) is a major SIRT5 substrate in the heart, and Sirt5 KO mice develop hypertrophic cardiomyopathy with reduced ECHA activity, increased long-chain acyl-CoAs, and decreased cardiac ATP under fasting. |
Acyl-CoA profiling (metabolomics), proteomic succinylome analysis, SIRT5 KO mouse cardiac phenotyping (echocardiography, biochemical assays) |
PNAS |
High |
27051063
|
| 2017 |
PKM2 is a physiological substrate of SIRT5. SIRT5-regulated hypersuccinylation inhibits pyruvate kinase activity of PKM2 by promoting its tetramer-to-dimer transition. A succinylation-mimetic PKM2 K311E mutation promotes nuclear accumulation and increases protein kinase activity, forming a PKM2-HIF1α complex at the IL-1β promoter in LPS-stimulated macrophages. SIRT5-deficient mice are more susceptible to DSS-induced colitis. |
Co-immunoprecipitation, enzymatic activity assay, site-directed mutagenesis (K311E), chromatin immunoprecipitation, SIRT5 KO mouse colitis model |
Cell Reports |
High |
28614718
|
| 2017 |
PKM2 is succinylated at K498, which increases its activity. SIRT5 binds to, desuccinylates, and inhibits PKM2 activity. Increased ROS decreases succinylation and activity of PKM2 by increasing its binding to SIRT5. A succinylation-mimetic K498E mutant decreases cellular NADPH and inhibits cell proliferation and tumor growth. |
Co-immunoprecipitation, in vitro desuccinylation assay, enzymatic activity assay, site-directed mutagenesis (K498E), cell proliferation and tumor growth assays |
Oncotarget |
Medium |
28036303
|
| 2015 |
SIRT5 and SIRT3 both regulate VLCAD (very long-chain acyl-CoA dehydrogenase). SIRT5 desuccinylates K299 (stabilizing FAD cofactor) and K482, K492, K507 (cardiolipin-binding domain). Succinylation of C-terminal lysines eliminates VLCAD binding to cardiolipin; SIRT5-mediated desuccinylation rescues membrane binding. VLCAD from SIRT5 KO mice shows reduced cardiolipin binding. |
In vitro desuccinylation assay, site-directed mutagenesis, cardiolipin-binding assay, SIRT5 KO mouse liver mitochondria |
PLOS ONE |
High |
25811481
|
| 2015 |
SIRT5 regulates ammonia production in non-liver cells by controlling glutamine metabolism. SIRT5 co-immunoprecipitates with glutaminase, and SIRT5 inhibition increases succinylation of glutaminase. SIRT5 silencing increases ammonia production, and this triggers increased autophagy and mitophagy, which is prevented by glutaminase inhibition or glutamine withdrawal. |
Co-immunoprecipitation, ammonia measurement, succinylation assay, autophagy/mitophagy markers, siRNA knockdown, SIRT5 inhibitor (MC3482) |
Autophagy |
Medium |
25700560
|
| 2017 |
SIRT5 directly desuccinylates SHMT2 at lysine 280, which is crucial for activating SHMT2 enzymatic activity and driving serine catabolism. Hypersuccinylation of SHMT2 at K280 inhibits its enzymatic activity and downregulates tumor cell growth in vitro and in vivo. |
Co-immunoprecipitation, in vitro desuccinylation assay, site-directed mutagenesis (K280), enzymatic activity assay, xenograft tumor model |
Cancer Research |
High |
29180469
|
| 2018 |
SIRT5 is present in peroxisomes and ACOX1 is a physiological substrate of SIRT5. SIRT5-mediated desuccinylation inhibits ACOX1 activity by suppressing its active dimer formation in both cultured cells and mouse livers. SIRT5 deletion increases H2O2 production and oxidative DNA damage, reversible by ACOX1 knockdown. |
Subcellular fractionation (peroxisome isolation), Co-IP, in vitro desuccinylation assay, ACOX1 activity assay (dimer formation), H2O2 measurement, SIRT5 KO mouse |
EMBO Reports |
High |
29491006
|
| 2017 |
SIRT5 binds to cardiolipin via an amphipathic helix on its N-terminus. SIRT5 desuccinylates inner mitochondrial membrane proteins, particularly targeting Complex I and Complex II. SIRT5-/- HEK293 cells show defects in Complex I- and Complex II-driven respiration. SIRT5-/- mice exhibit mild lactic acidosis consistent with Complex II deficiency. |
Cardiolipin-binding assay, in vitro succinylation/desuccinylation assay, quantitative mass spectrometry, Seahorse respirometry (SIRT5 KO cells), SIRT5 KO mouse metabolic phenotyping |
Journal of Biological Chemistry |
High |
28458255
|
| 2018 |
SIRT5 deacetylates LDHB at lysine-329, promoting its enzymatic activity. SIRT5 KO or inhibition increases LDHB acetylation at K329 and inhibits LDHB activity, downregulating autophagy and colorectal cancer cell growth in vitro and in vivo. |
Mass spectrometry (substrate identification), Co-IP, in vitro deacetylation assay, enzymatic activity assay, SIRT5 KO/inhibitor, xenograft |
Molecular Oncology |
Medium |
30443978
|
| 2019 |
SIRT5 stabilizes glutaminase (GLS) in transformed cells by desuccinylating GLS and thereby protecting it from ubiquitin-mediated degradation. |
Co-immunoprecipitation, in vitro desuccinylation assay, ubiquitination assay, GLS protein stability assay, SIRT5 KO/OE in cell lines and mouse models |
PNAS |
High |
31843902
|
| 2014 |
SIRT5 expression is under the control of PGC-1α (via PPARα and ERRα) and AMPK, which have opposite effects: PGC-1α increases SIRT5 mRNA ~4-fold, while AMPK activation decreases SIRT5 mRNA by ~58%. SIRT5 overexpression increases ATP synthesis and oxygen consumption in HepG2 cells without affecting mitochondrial biogenesis. |
PGC-1α overexpression in mouse primary hepatocytes, AMPK overexpression, metformin treatment in vivo and in vitro, Seahorse respirometry |
FASEB Journal |
Medium |
24687991
|
| 2020 |
MAVS is a physiological substrate of SIRT5. MAVS is succinylated upon viral challenge at Lysine 7. SIRT5-catalyzed desuccinylation of MAVS at K7 diminishes MAVS aggregation after viral infection, inhibiting MAVS activation and impairing type I IFN production. SIRT5 enzyme-deficient mutant (H158Y) loses suppressive role on MAVS activation. Sirt5-deficient mice are resistant to viral infection. |
Mass spectrometry, Co-IP, in vitro desuccinylation assay, MAVS aggregation assay, IFN production assay, catalytic mutant (H158Y), SIRT5 KO mouse viral infection model |
EMBO Journal |
High |
32301534
|
| 2021 |
SIRT5 interacts with p53 and desuccinylates p53 at Lysine 120, suppressing p53 transcriptional activity. Succinylation of p53 at K120 is identified as a novel PTM. In p53/Sirt5 double KO mice, suppression of p53 target gene expression and cell apoptosis upon DNA damage is p53-dependent. |
Co-immunoprecipitation, mass spectrometry (K120 identification), in vitro desuccinylation assay, p53 transcriptional reporter, double KO mouse |
Cell Death and Differentiation |
High |
34642466
|
| 2020 |
SIRT5 interacts with citrate synthase (CS) and desuccinylates CS at evolutionarily conserved residues K393 and K395. Hypersuccinylation of CS at K393 and K395 dramatically reduces its enzymatic activity and suppresses colon cancer cell proliferation and migration. |
Co-immunoprecipitation, in vitro desuccinylation assay, site-directed mutagenesis (K393, K395), enzymatic activity assay, cell proliferation/migration assays |
Biological Chemistry |
Medium |
32284438
|
| 2019 |
SIRT5 directly interacts with and desuccinylates OGDH (2-oxoglutarate dehydrogenase), inhibiting OGDH complex activity. SIRT5 loss decreases mitochondrial membrane potential and ATP while increasing ROS through OGDH. OGDH inhibition reverses cell growth and migration increases induced by SIRT5 deletion. |
Co-immunoprecipitation, in vitro desuccinylation assay, OGDH activity assay, mitochondrial membrane potential, ATP/ROS measurement, siRNA epistasis |
Experimental Cell Research |
Medium |
31247190
|
| 2019 |
SIRT5 desuccinylates SDHA at K547, inhibiting succinate dehydrogenase activity by suppressing SDH5 binding. SIRT5 silencing leads to hypersuccinylation and reactivation of SDHA, inhibiting ccRCC cell proliferation. |
Co-immunoprecipitation, in vitro desuccinylation assay, SDH activity assay, site-directed mutagenesis (K547R), SIRT5 siRNA knockdown |
Free Radical Biology and Medicine |
Medium |
30703481
|
| 2016 |
PKCε activation increases SIRT5 levels and desuccinylation activity in isolated mitochondria from rat cortical cultures in a Nampt-dependent manner. SIRT5 regulates oxygen consumption with Complex I, Complex II, and Complex IV substrates. PKCε-mediated neuroprotection against ischemia is abolished in SIRT5-/- mice, establishing SIRT5 as a downstream effector of PKCε-mediated ischemic tolerance. |
Isolated mitochondria, PKCε activator treatment, desuccinylation activity assay, Seahorse respirometry, SIRT5 KO mouse ischemia model (OGD and MCAO) |
Scientific Reports |
Medium |
27435822
|
| 2019 |
SIRT5 deficiency leads to suppression of mitochondrial NADH oxidation and inhibition of ATP synthase activity, decreasing mitochondrial ATP production, increasing AMP/ATP ratio, and activating AMPK in cultured cells and mouse hearts under energy stress. SIRT5 KO attenuates transverse aortic constriction-induced cardiac hypertrophy in mice via AMPK activation. |
SIRT5 KO cell lines, mouse heart SIRT5 KO, ATP synthase activity assay, Seahorse respirometry, AMP/ATP ratio, AMPK activation assay, TAC model |
PLOS ONE |
Medium |
30759120
|
| 2023 |
SIRT5 desuccinylates ME2 (mitochondrial malic enzyme 2) at K346. Glutamine deprivation enhances SIRT5-ME2 interaction and promotes desuccinylation, activating ME2 enzymatic activity and enhancing mitochondrial respiration. |
Co-immunoprecipitation, in vitro desuccinylation assay, site-directed mutagenesis (K346), ME2 enzymatic activity assay, Seahorse respirometry, SIRT5 KO |
Cell Death and Differentiation |
Medium |
38007551
|
| 2022 |
SIRT5 interacts with SARS-CoV-2 Nsp14 (but not Nsp10), suggesting SIRT5 and Nsp10 are parts of separate Nsp14 complexes. The SIRT5 catalytic domain is necessary for interaction with Nsp14, but Nsp14 does not appear to be directly deacylated by SIRT5. SIRT5 KO cells express higher basal innate immunity markers and mount a stronger antiviral response independently of MAVS. |
Co-immunoprecipitation, catalytic domain mutant analysis, SIRT5 KO cell lines, viral replication assays, innate immunity marker quantification |
PLOS Pathogens |
Medium |
36095012
|
| 2018 |
SIRT5 isoforms 1-3 localize to mitochondria, while SIRT5iso4 localizes mainly to the cytoplasm. SIRT5iso2-4 have little deacylase activity compared to SIRT5iso1. |
Fluorescence microscopy (GFP-tagged isoforms), subcellular fractionation, in vitro deacylase activity assay |
Biochemical and Biophysical Research Communications |
Medium |
29932920
|
| 2021 |
SIRT5 loss in PDAC enhances glutamine and glutathione metabolism via acetylation-mediated activation of GOT1. A selective SIRT5 activator (MC3138) diminishes nucleotide pools and sensitizes PDAC cells to gemcitabine. |
SIRT5 conditional KO mouse PDAC model, metabolomics, proteomics, siRNA knockdown in organoids, SIRT5 activator in patient-derived xenografts |
Gastroenterology |
Medium |
34245764
|
| 2022 |
TRIM21 promotes SIRT5 ubiquitination and degradation upon LPS challenge, while HAUSP (a deubiquitinating enzyme) stabilizes SIRT5. In a feedback loop, SIRT5 degradation sustains acetylation of TRIM21 at K351, increasing its E3 ligase activity in LPS-activated macrophages and enhancing IL-1β production. |
Co-immunoprecipitation, ubiquitination assay, deubiquitinase binding assay, acetylation assay (TRIM21 K351), SIRT5 KO macrophages, LPS stimulation model |
EMBO Reports |
Medium |
35770730
|
| 2019 |
SIRT5 desuccinylates SDHA (succinate dehydrogenase subunit A), which demalonylates and inactivates SDHA, leading to accumulation of succinate. Succinate then binds and activates thioredoxin reductase 2 (TrxR2) to confer chemotherapy resistance in SIRT5+ colorectal cancer cells. Elevated succinate-to-αKG ratio also inhibits αKG-dependent dioxygenases to maintain cetuximab resistance. |
SIRT5 knockdown/overexpression, succinate measurement, TrxR2 activity assay, epistasis experiments with succinate pathway, CRC cell resistance assays |
Cell Reports |
Medium |
29514096
|
| 2023 |
SIRT5 selectively reduces malonylation of histones, and KAT2A acts as a malonyltransferase for histones (KAT2A knockdown reduced histone malonylation). H2B_K5 is highly malonylated and regulated by SIRT5 in mouse brain and liver. Histone malonylation increases nucleolar area and ribosomal RNA expression. |
Mass spectrometry, siRNA knockdown of 22 KATs, SIRT5 KO, nucleolar area quantification, rRNA expression analysis |
iScience |
Medium |
36879797
|
| 2021 |
SIRT5 is required for maintenance of histone acetylation and methylation levels in melanoma cells, thereby promoting proper gene expression including MITF and c-MYC. SIRT5 loss impairs these epigenetic marks independent of direct histone deacylation. |
SIRT5 KO in multiple melanoma cell lines, metabolite profiling, transcriptomic analysis, xenograft mouse model, autochthonous melanoma mouse model |
Journal of Clinical Investigation |
Medium |
33945506
|
| 2022 |
SIRT5 deglutarylates GCDH (glutaryl-CoA dehydrogenase), restoring its enzymatic activity. Glutarylation of GCDH decreases lysine oxidation; SIRT5 deglutarylation relieves this inhibition, supporting a feedback loop within the lysine/tryptophan oxidation pathway. |
In vitro deglutarylation assay, GCDH enzymatic activity assay, metabolomics, SIRT5 KO mouse |
Journal of Biological Chemistry |
Medium |
35157847
|
| 2024 |
SIRT5 desuccinylates TBK1 at K137, leading to TBK1 dephosphorylation and suppression of downstream inflammatory signaling. SIRT5 expression is reduced in aged primate skeletal muscles. Lentiviral SIRT5 gene therapy in mice enhances physical performance and alleviates age-related muscle dysfunction. |
Co-immunoprecipitation, in vitro desuccinylation assay, site-directed mutagenesis (K137), TBK1 phosphorylation assay, SIRT5 KO in human myotubes, lentiviral gene therapy in mice |
Nature Metabolism |
High |
40087407
|
| 2024 |
SIRT5 desuccinylates TBK1 at K38, K154, and K692. In endotoxemia/sepsis models, reduced SIRT5 in macrophages increases TBK1 succinylation, inhibiting TBK1 binding to IRF3 and TRAF2 and suppressing the NF-κB/IRF inflammatory response. Adoptive transfer of macrophages with succinylation-resistant TBK1-2KR (K154/692R) reversed cytokine suppression caused by SIRT5 deficiency. |
Mass spectrometry (succinylation site identification), Co-IP (TBK1-IRF3, TBK1-TRAF2), site-directed mutagenesis (K154/692R), adoptive macrophage transfer, SIRT5 KO mouse sepsis model |
Cell Reports |
High |
39673708
|
| 2024 |
SIRT5 desuccinylates RAB7A at K31, maintaining RAB7A activity and autophagosome-lysosome fusion. Cd exposure reduces SIRT5 expression, increasing RAB7A K31 succinylation and inhibiting RAB7A activity, leading to autophagic flux blockade and APP accumulation. SIRT5 overexpression restores autophagic flux and reduces Aβ in Cd-exposed FAD4T mice. |
Proteomic analysis (IPA), Co-IP, in vitro desuccinylation, RAB7A activity assay, autophagy flux assay, SIRT5 OE in FAD4T mice |
Advanced Science |
Medium |
38837686
|
| 2024 |
SIRT5 desuccinylates CPT2 (carnitine palmitoyltransferase 2) at K424. Succinylation of K424 inactivates CPT2 enzymatic activity, leading to accumulation of fatty acyl-carnitines and impaired fatty acid oxidation. CPT2 K424R mutation (reducing succinylation) counteracts SIRT5 deficiency-induced FAO impairment and lipid deposition in diabetic cardiomyopathy. |
Succinylomics proteomics, Co-IP, in vitro desuccinylation assay, site-directed mutagenesis (K424R), CPT2 enzymatic assay, SIRT5 KO mouse diabetic cardiomyopathy model |
Redox Biology |
High |
38718533
|
| 2021 |
SIRT5 is required for proliferation and survival across cutaneous and uveal melanoma. SIRT5 loss disrupts histone acetylation and methylation, downregulating MITF and c-MYC expression. This demonstrates a metabolite-epigenetics link where SIRT5 controls chromatin dynamics in cancer cells. |
SIRT5 KO cell lines, xenograft mouse model, autochthonous Braf/Pten melanoma mouse model, metabolite profiling, transcriptomics |
Journal of Clinical Investigation |
Medium |
33945506
|
| 2022 |
AKT2 inhibits PGC-1α to downregulate SIRT5; SIRT5 is identified as an AKT2 binding partner. SIRT5-AKT2 crosstalk facilitates TFEB-dependent lysosomal function in RPE cells. AKT2 overexpression causes a dry AMD-like phenotype in aging mice by impairing the AKT2/SIRT5/TFEB pathway. |
Co-immunoprecipitation (AKT2-SIRT5), SIRT5 KO/OE in RPE, AKT2 KI mouse model, lysosomal function assays, iPSC-derived RPE with CFH Y402H variant |
Nature Communications |
Medium |
39034314
|
| 2023 |
SIRT5 desuccinylates AIFM1 (apoptosis-inducing factor mitochondria-associated 1); reduced SIRT5 leads to increased AIFM1 succinylation, abolishing the AIFM1-CHCHD4 interaction and reducing import of electron transport chain complex subunits into mitochondria, leading to mitochondrial dysfunction. |
IP-MS (interactome identification), Co-IP, succinylation assay, AIFM1-CHCHD4 interaction assay, ETC subunit quantification, SIRT5 KO mice |
Experimental & Molecular Medicine |
Medium |
36653443
|
| 2019 |
SIRT5 deacetylates cytochrome c, and this deacetylation is proposed to regulate HCC cell apoptosis via the mitochondrial pathway. |
Co-IP, western blot for cytochrome c acetylation, SIRT5 KO/OE in HCC cell lines |
Journal of Cancer |
Low |
31333804
|
| 2024 |
Set7/9 promotes binding of Cbx1 to H3K9me2/3 at the Sirt5 promoter, forming a transcription repressor complex that represses Sirt5 transcription. Reduced SIRT5 decreases deacetylation of glutaminase, promoting its expression and triggering glutamate/ammonia excitotoxicity in ischemic neurons. |
ChIP assay (Cbx1 at Sirt5 promoter), proteomic analysis, Set7/9 KD/KO in neurons, Sirt5-dependent rescue experiments |
Cell Death and Differentiation |
Medium |
38365969
|
| 2023 |
Sodium butyrate activates HMGCS2 enzymatic activity through SIRT5-mediated desuccinylation at K221 and K358 to promote ketone body production in hepatocytes. This effect is significantly reduced by a SIRT5 inhibitor and in Sirt5 KO mice. |
Succinylomics proteomics (SB treatment), HMGCS2 activity assay, SIRT5 inhibitor pharmacological blockade, Sirt5 KO mice, blood BHB measurement |
Frontiers of Medicine |
Medium |
36602721
|
| 2021 |
SIRT5 is identified as a key transcriptional target of ATF4 that promotes cancer cell survival during metabolic stress. SIRT5 protects glutaminase C (GAC) from degradation and supports glutamine metabolism. Ectopic SIRT5 expression compensates for ATF4 knockdown in cells under glutamine deprivation-induced stress. |
ATF4 KD with transcriptomic analysis, SIRT5 OE rescue of ATF4 KD, GLS/GAC stability assay, glutamine deprivation stress model |
Cell Death Discovery |
Medium |
35963851
|
| 2019 |
SIRT5 promotes brown adipocyte differentiation and browning of subcutaneous white adipose tissue. SIRT5 knockdown reduces intracellular α-ketoglutarate concentration, leading to elevated H3K9me2 and H3K9me3 at promoters of Pparγ and Prdm16, inhibiting their transcription. |
SIRT5 KD/KO in preadipocytes and mice, α-ketoglutarate measurement, ChIP assay (H3K9me2/3 at Pparγ and Prdm16 promoters), cold tolerance test |
Diabetes |
Medium |
31010955
|