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PMID 16043017  (  )
Title Redox proteomics analysis of oxidatively modified proteins in G93A-SOD1 transgenic mice--a model of familial amyotrophic lateral sclerosis.
Abstract Amyotrophic lateral sclerosis (ALS) is a fatal motor neuron degenerative disease characterized by the loss of neuronal function in the motor cortex, brain stem, and spinal cord. Familial ALS cases, accounting for 10-15% of all ALS disease, are caused by a gain-of-function mutation in Cu,Zn-superoxide dismutase (SOD1). Two hypotheses have been proposed to explain the toxic gain of function of mutant SOD (mSOD). One is that mSOD can directly promote reactive oxygen species and reactive nitrogen species generation, whereas the other hypothesis suggests that mSODs are prone to aggregation due to instability or association with other proteins. However, the hypotheses of oxidative stress and protein aggregation are not mutually exclusive. G93A-SOD1 transgenic mice show significantly increased protein carbonyl levels in their spinal cord from 2 to 4 months and eventually develop ALS-like motor neuron disease and die within 5-6 months. Here, we used a parallel proteomics approach to investigate the effect of the G93A-SOD1 mutation on protein oxidation in the spinal cord of G93A-SOD1 transgenic mice. Four proteins in the spinal cord of G93A-SOD1 transgenic mice have higher specific carbonyl levels compared to those of non-transgenic mice. These proteins are SOD1, translationally controlled tumor protein (TCTP), ubiquitin carboxyl-terminal hydrolase-L1 (UCH-L1), and, possibly, alphaB-crystallin. Because oxidative modification can lead to structural alteration and activity decline, our current study suggests that oxidative modification of UCH-L1, TCTP, SOD1, and possibly alphaB-crystallin may play an important role in the neurodegeneration of ALS.

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Targets by SciMiner Summary

HUGO ID Symbol Target Name #Occur ActualStr
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))46SOD1 | SOD1-related | mSOD1 | SOD1-linked | SOD | superoxide dismutase | mSOD |
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)42uch l1 | UCH-L1 |
12022TPT1tumor protein, translationally-controlled 117TCTP |
10417RPS27Aribosomal protein S27a7ubiquitin |
11892TNFtumor necrosis factor (TNF superfamily, member 2)3TNF--modulating | tumor necrosis factor | TNF- |
12609USP11ubiquitin specific peptidase 112ubiquitin carboxyl terminal hydrolase |
5232HSPA1Aheat shock 70kDa protein 1A2HSPs |
4341GLULglutamate-ammonia ligase (glutamine synthetase)1glutamine synthetase |
7873NOS2Anitric oxide synthase 2A (inducible, hepatocytes)1nitric oxide synthase |
12468UBCubiquitin C1ubiquitin c |

 


Targets by SciMiner Full list

HUGO ID Symbol Name ActualStr Score FlankingText
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD12.7caused by a gain-of-function mutation in Cu Zn-superoxide dismutase (SOD1) SOD1
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD1.9proposed to explain the toxic gain of function of mutant SOD (mSOD) mSOD
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))mSOD1.9explain the toxic gain of function of mutant SOD (mSOD) mSOD
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))mSOD1.9One is that mSOD can directly promote reactive oxygen species and reactive nitrogen species
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD12.7These proteins are SOD1 translationally controlled tumor protein (TCTP), TCTP ubiquitin carboxyl-terminal hydrolase-L1 (UCH-L1),
12022TPT1tumor protein, translationally-controlled 1TCTP2.5These proteins are SOD1 translationally controlled tumor protein (TCTP), TCTP ubiquitin carboxyl-terminal hydrolase-L1 (UCH-L1), UCH-L1 and possibly B-crystallin
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)UCH-L12.2translationally controlled tumor protein (TCTP), TCTP ubiquitin carboxyl-terminal hydrolase-L1 (UCH-L1), UCH-L1 and possibly B-crystallin
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)UCH-L12.2activity decline our current study suggests that oxidative modification of UCH-L1 TCTP SOD1 and possibly B-crystallin may play an important role
12022TPT1tumor protein, translationally-controlled 1TCTP2.5decline our current study suggests that oxidative modification of UCH-L1 TCTP SOD1 and possibly B-crystallin may play an important role in
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD12.7our current study suggests that oxidative modification of UCH-L1 TCTP SOD1 and possibly B-crystallin may play an important role in the
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD12.7caused by a gain-of-function mutation in Cu Zn-superoxide dismutase (SOD1) SOD1 3 and 4
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD12.7SOD1 catalyzes the disproportionation of superoxide anion radical to hydrogen peroxide
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD12.7Over 100 different missense substitutions in the 153-amino-acid SOD1 have been described in individuals and kindreds affected by SOD1-linked
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD1-linked1.9SOD1 have been described in individuals and kindreds affected by SOD1-linked FALS 5
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD12.7One of the most common mutations of SOD1 is the substitution of glycine by alanine at residue 93
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD1.9proposed to explain the toxic gain of function of mutant SOD (mSOD) mSOD 6
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))mSOD1.9explain the toxic gain of function of mutant SOD (mSOD) mSOD 6
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))mSOD1.9One is that mSOD can directly promote reactive oxygen species and reactive nitrogen species
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))mSOD1.9in tissues from ALS patients 23 24 and 25 and mSOD transgenic mice 22 and 26 reportedly are rich in mSOD
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))mSOD1.9mSOD transgenic mice 22 and 26 reportedly are rich in mSOD ubiquitin and neurofilament proteins
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD1-related1.9oxidative modification of macromolecules was demonstrated in neuronal tissues of SOD1-related FALS patients and transgenic mice 30 31 and 32
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))mSOD11.9Enhanced susceptibility of exogenous oxidative stress in mSOD1 cell cultures was also observed in in vitro studies 33
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))mSOD1.9Exogenous oxidative stress can even inhibit the rapid degradation of mSOD 36
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD12.7higher capacity to generate free radicals 9 compared to wild-type SOD1
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD12.7of the oxidatively modified proteins in G93A-SOD1 transgenic mice is SOD1 32 indicating that oxidation of SOD1 is likely important to
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD12.7G93A-SOD1 transgenic mice is SOD1 32 indicating that oxidation of SOD1 is likely important to the development of this model of
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD12.7Transgenic mice expressing the human SOD1 gene with a G93A mutation strain B6SJL/TgN B6SJL TgN (SOD1-G93A)-2Gur)
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)UCH-L12.2Ubiquitin carboxyl-terminal hydrolase L1 (UCH-L1) UCH-L1 assay
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)UCH-L12.2The activities of UCH-L1 in the spinal cord were measured by determining the rate
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)UCH-L12.2UCH-L1 activities of each individual were assayed by the change of
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)UCH-L12.2The average UCH-L1 activities of six transgenic animals were compared to those of
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD12.7These proteins were identified as SOD1 translationally controlled tumor protein (TCTP), TCTP UCH-L1 and B-crystallin
12022TPT1tumor protein, translationally-controlled 1TCTP2.5proteins were identified as SOD1 translationally controlled tumor protein (TCTP), TCTP UCH-L1 and B-crystallin
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)UCH-L12.2were identified as SOD1 translationally controlled tumor protein (TCTP), TCTP UCH-L1 and B-crystallin
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD12.7We report here that the specific carbonyl levels of human SOD1 TCTP UCH-L1 and possibly B-crystallin are significantly increased in the
12022TPT1tumor protein, translationally-controlled 1TCTP2.5report here that the specific carbonyl levels of human SOD1 TCTP UCH-L1 and possibly B-crystallin are significantly increased in the spinal
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)UCH-L12.2here that the specific carbonyl levels of human SOD1 TCTP UCH-L1 and possibly B-crystallin are significantly increased in the spinal cord
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD12.7Spots close to human SOD1 are modified SOD1 possibly phosphorylated SOD1
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD12.7Spots close to human SOD1 are modified SOD1 possibly phosphorylated SOD1
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD12.7Spots close to human SOD1 are modified SOD1 possibly phosphorylated SOD1
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)UCH-L12.2oxidative modification inactivated protein activity we compared the activity of UCH-L1 in the G93A-SOD1 transgenic mice to that in the control
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)UCH-L12.2of activity of oxidatively modified proteins 49 50 and 51 UCH-L1 activity was significantly decreased (29%) 29% in the G93A-SOD1 transgenic
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD1.9provide insight into the mechanisms of the neurotoxicity of mutant SOD in vivo
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD12.7It is well established that mutant SOD1 enhances oxidative activity by acting as a peroxidase 9 11
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD12.7carbonyl levels compared to those of the nontransgenic mice as SOD1 TCTP UCH-L1 and B-crystallin
12022TPT1tumor protein, translationally-controlled 1TCTP2.5levels compared to those of the nontransgenic mice as SOD1 TCTP UCH-L1 and B-crystallin
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)UCH-L12.2compared to those of the nontransgenic mice as SOD1 TCTP UCH-L1 and B-crystallin
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD12.7SOD1 previously was identified immunochemically as one of the oxidatively modified
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD12.7proteomics approach to confirm that the specific carbonyl level of SOD1 is increased in the spinal cords of G93A-SOD1 transgenic mice
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD12.7Although G93A-SOD1 shows dismutation activity identical to that of wild-type SOD1 the activity of SOD1 in FALS patients with mutations is
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD12.7activity identical to that of wild-type SOD1 the activity of SOD1 in FALS patients with mutations is decreased 50% in motor
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD12.7radical production in the G93A-SOD1 transgenic animals is induced by SOD1 mutation 32 alteration of tumor necrosis factor TNF- and TNF--modulating
11892TNFtumor necrosis factor (TNF superfamily, member 2)TNF-1.2induced by SOD1 mutation 32 alteration of tumor necrosis factor TNF- and TNF--modulating cytokines 38 and 46
11892TNFtumor necrosis factor (TNF superfamily, member 2)TNF--modulating1.2SOD1 mutation 32 alteration of tumor necrosis factor TNF- and TNF--modulating cytokines 38 and 46
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD12.7study is consistent with the notion that oxidative modification of SOD1 plays a role in the neurotoxicity of mutant SOD1 in
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD12.7of SOD1 plays a role in the neurotoxicity of mutant SOD1 in the disease
12022TPT1tumor protein, translationally-controlled 1TCTP2.5modified protein in G93A-SOD1 transgenic mice identified by proteomics was TCTP
12022TPT1tumor protein, translationally-controlled 1TCTP2.5TCTP processes calcium-binding activity (reviewed reviewed in 55 and has a
12022TPT1tumor protein, translationally-controlled 1TCTP2.5Overexpression of TCTP stabilizes microtubules and alters cell morphology 57
12022TPT1tumor protein, translationally-controlled 1TCTP2.5Other molecular interactions of TCTP include self-interaction 58 and the interaction with myeloid cell leukemia
12022TPT1tumor protein, translationally-controlled 1TCTP2.5TCTP levels are highly regulated in response to various stress conditions
12022TPT1tumor protein, translationally-controlled 1TCTP2.5characterization as an antiapoptotic protein 67 these observations suggest that TCTP may exert a cytoprotective function for cells
12022TPT1tumor protein, translationally-controlled 1TCTP2.5The current study showed that TCTP was oxidatively modified in the spinal cord of G93A-SOD1 mice
12022TPT1tumor protein, translationally-controlled 1TCTP2.5the putative cytoprotective function and the calcium binding affinity of TCTP are impaired in G93A-SOD1 mice because oxidative modification alters the
12022TPT1tumor protein, translationally-controlled 1TCTP2.5lymphocytes from ALS patients 70 suggesting that oxidative modification of TCTP may also play an important role in neurotoxicity of G93A-SOD1
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)UCH-L12.2UCH-L1 belongs to a family of ubiquitin carboxyl-terminal hydrolases that play
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)UCH-L12.2Loss of UCH-L1 function causes neuroaxonal dystrophy 74 75 and 76 significant protein
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)UCH-L12.2Similarly decreased UCH-L1 activity by mutation also enhances protein aggregation in Escherichia coli
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)UCH-L12.2Therefore based on the prior literature oxidative inactivation of UCH-L1 presented in the current study possibly contributes to both the
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)UCH-L12.2notion and consistent with our finding ( Fig 4 that UCH-L1 activity is decreased in G93A-SOD1 mouse spinal cord the inclusions
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))mSOD11.9G93A-SOD1 mouse spinal cord the inclusions of human ALS and mSOD1 (including including G93A mice are excessively ubiquitinated 79 80 81
5232HSPA1Aheat shock 70kDa protein 1AHSPs1.2HSPs are cellular constituents synthesized by living organisms under stress conditions
5232HSPA1Aheat shock 70kDa protein 1AHSPs1.2to stabilize other proteins under stress conditions whereas the high-molecular-weight HSPs normally play roles in protein folding during biosynthesis 83 and
12022TPT1tumor protein, translationally-controlled 1TCTP2.5remarkable feature of the oxidatively modified proteins (except except for TCTP in G93A-SOD1 transgenic mice is that they are involved in
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD12.7Aberrant accumulation of mutant SOD1 is demonstrated in Caenorhabditis elegans expressing human mutant SOD1 36
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD12.7mutant SOD1 is demonstrated in Caenorhabditis elegans expressing human mutant SOD1 36
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD12.7Based on our current observations the increased oxidative modification of SOD1 UCH-L1 and B-crystallin plays a significant role in the protein
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)UCH-L12.2on our current observations the increased oxidative modification of SOD1 UCH-L1 and B-crystallin plays a significant role in the protein aggregation
12022TPT1tumor protein, translationally-controlled 1TCTP2.5involves oxidative modification of a Ca 2 regulating protein (TCTP) TCTP and proteins involved in inclusion formation (SOD1, SOD1 UCH-L1 and
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD12.7protein (TCTP) TCTP and proteins involved in inclusion formation (SOD1, SOD1 UCH-L1 and B-crystallin suggesting a potential relationship between protein oxidation
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)UCH-L12.2(TCTP) TCTP and proteins involved in inclusion formation (SOD1, SOD1 UCH-L1 and B-crystallin suggesting a potential relationship between protein oxidation protein
12022TPT1tumor protein, translationally-controlled 1TCTP2.5proteins impairs protein stability ( B-crystallin Ca 2 binding (TCTP), TCTP protein degradation (UCH-L1), UCH-L1 and antioxidant capacity (SOD1) SOD1
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)UCH-L12.2( B-crystallin Ca 2 binding (TCTP), TCTP protein degradation (UCH-L1), UCH-L1 and antioxidant capacity (SOD1) SOD1
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD12.7(TCTP), TCTP protein degradation (UCH-L1), UCH-L1 and antioxidant capacity (SOD1) SOD1
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)UCH-L12.2Fig 4._amp_#xa0 Activity of UCH-L1 in G93A-SOD1 transgenic mice as a percentage of the nontransgenic
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)UCH-L12.2The activity of UCH-L1 is significantly decreased in the spinal cord of G93A-SOD1 transgenic
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))superoxide dismutase1.0familial als cases accounting for 10_amp_#x2013;15% of all als disease are caused by a gain of function mutation in cu zn superoxide dismutase sod1 .
10417RPS27Aribosomal protein S27aubiquitin1.0these proteins are sod1 translationally controlled tumor protein tctp ubiquitin carboxyl terminal hydrolase l1 uch l1 and possibly b crystallin.
12609USP11ubiquitin specific peptidase 11ubiquitin carboxyl terminal hydrolase1.0these proteins are sod1 translationally controlled tumor protein tctp ubiquitin carboxyl terminal hydrolase l1 uch l1 and possibly b crystallin.
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)uch l11.0these proteins are sod1 translationally controlled tumor protein tctp ubiquitin carboxyl terminal hydrolase l1 uch l1 and possibly b crystallin.
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)uch l11.0because oxidative modification can lead to structural alteration and activity decline our current study suggests that oxidative modification of uch l1 tctp sod1 and possibly b crystallin may play an important role in the neurodegeneration of als.
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))superoxide dismutase1.0inherited als accounts for 10_amp_#x2013;15% of cases and among all of the familial als fals patients 20_amp_#x2013;30% of them are caused by a gain of function mutation in cu zn superoxide dismutase sod1 [3] and [4] .
10417RPS27Aribosomal protein S27aubiquitin1.0the proteinaceous inclusions found in tissues from als patients [23] [24] and [25] and msod transgenic mice [22] and [26] reportedly are rich in msod ubiquitin and neurofilament proteins.
7873NOS2Anitric oxide synthase 2A (inducible, hepatocytes)nitric oxide synthase1.0also elevation of inflammation related genes e.g. induced nitric oxide synthase proinflammatory cytokines occurs at 11 weeks of age in the presymptomatic stage before motor neuron death in g93a sod1 transgenic mice suggesting that neuroinflammation mediated oxidative stress is a
10417RPS27Aribosomal protein S27aubiquitin1.0ubiquitin carboxyl terminal hydrolase l1 uch l1 assay
12609USP11ubiquitin specific peptidase 11ubiquitin carboxyl terminal hydrolase1.0ubiquitin carboxyl terminal hydrolase l1 uch l1 assay
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)uch l11.0ubiquitin carboxyl terminal hydrolase l1 uch l1 assay
12468UBCubiquitin Cubiquitin c1.0the activities of uch l1 in the spinal cord were measured by determining the rate of conversion of ubiquitin c terminal 7 amido 4 methylcoumarin ub amc calbiochem to ubiquitin and free amc [48] .
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)uch l11.0the activities of uch l1 in the spinal cord were measured by determining the rate of conversion of ubiquitin c terminal 7 amido 4 methylcoumarin ub amc calbiochem to ubiquitin and free amc [48] .
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)uch l11.0uch l1 activities of each individual were assayed by the change of _amp_#x3bb; em 460 nm over time.
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)uch l11.0the average uch l1 activities of six transgenic animals were compared to those of six control animals using student's t test.
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)uch l11.0these proteins were identified as sod1 translationally controlled tumor protein tctp uch l1 and b crystallin.
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)uch l11.0we report here that the specific carbonyl levels of human sod1 tctp uch l1 and possibly b crystallin are significantly increased in the spinal cord of g93a sod1 transgenic mice compared to that of nontransgenic mice.
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)uch l11.0in order to confirm that oxidative modification inactivated protein activity we compared the activity of uch l1 in the g93a sod1 transgenic mice to that in the control mice.
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)uch l11.0consistent with our prior studies that demonstrate loss of activity of oxidatively modified proteins [49] [50] and [51] uch l1 activity was significantly decreased 29% in the g93a sod1 transgenic mice compared to that of nontransgenic control fig 4 .
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)uch l11.0in the current study we identified the proteins that demonstrate increased carbonyl levels compared to those of the nontransgenic mice as sod1 tctp uch l1 and b crystallin.
11892TNFtumor necrosis factor (TNF superfamily, member 2)tumor necrosis factor1.0moreover free radical production in the g93a sod1 transgenic animals is induced by sod1 mutation [32] alteration of tumor necrosis factor tnf and tnf modulating cytokines [38] and [46] .
10417RPS27Aribosomal protein S27aubiquitin1.0uch l1 belongs to a family of ubiquitin carboxyl terminal hydrolases that play important roles in the ubiquitin_amp_#x2013;proteolytic pathway [71] .
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)uch l11.0uch l1 belongs to a family of ubiquitin carboxyl terminal hydrolases that play important roles in the ubiquitin_amp_#x2013;proteolytic pathway [71] .
10417RPS27Aribosomal protein S27aubiquitin1.0uch ls then recycle ubiquitin from ubiquitinated protein complexes or polyubiquitin chains by cleaving the amide linkage next to the c terminal glycine of ubiquitin [72] .
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)uch l11.0loss of uch l1 function causes neuroaxonal dystrophy [74] [75] and [76] significant protein oxidization [45] and accumulation of synuclein protein in gracile axonal dystrophy mice [77] .
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)uch l11.0similarly decreased uch l1 activity by mutation also enhances protein aggregation in escherichia coli [78] .
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)uch l11.0therefore based on the prior literature oxidative inactivation of uch l1 presented in the current study possibly contributes to both the protein aggregation and the oxidative stress observed in g93a sod1 transgenic mice and als patients.
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)uch l11.0consistent with this notion and consistent with our finding fig 4 that uch l1 activity is decreased in g93a sod1 mouse spinal cord the inclusions of human als and msod1 including g93a mice are excessively ubiquitinated [79] [80] [81] and [82] .
10417RPS27Aribosomal protein S27aubiquitin1.0moreover crystallins were recruited to aggregates when cells were treated with proteasome inhibitor [88] and the degradation of b crystallin along with ubiquitin conjugation was decreased in bovine lens epithelial cells when b crystallin was oxidized [89] .
4341GLULglutamate-ammonia ligase (glutamine synthetase)glutamine synthetase1.0consistent with this notion inclusions in als patients contain b crystallin metallothionein glutamine synthetase and tubulin immunoreactivities [90] .
10417RPS27Aribosomal protein S27aubiquitin1.0ubiquitin protein epitopes and b crystallin are found in fibrillar neuronal inclusions in the cortex of sporadic als patients [79] [80] [81] and [91] .
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)uch l11.0based on our current observations the increased oxidative modification of sod1 uch l1 and b crystallin plays a significant role in the protein aggregation in the spinal cords of g93a sod1 transgenic mice.
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)uch l11.0study provides insight into the mechanism of g93a sod1 neurotoxicity in vivo which involves oxidative modification of a ca 2+ regulating protein tctp and proteins involved in inclusion formation sod1 uch l1 and b crystallin suggesting a potential relationship between protein oxidation protein aggregation and ca 2+ regulation in als.
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)uch l11.0moreover one can speculate that the oxidative modification of these proteins impairs protein stability b crystallin ca 2+ binding tctp protein degradation uch l1 and antioxidant capacity sod1 .
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)uch l11.0fig. 4._amp_#xa0;activity of uch l1 in g93a sod1 transgenic mice as a percentage of the nontransgenic control.
12513UCHL1ubiquitin carboxyl-terminal esterase L1 (ubiquitin thiolesterase)uch l11.0the activity of uch l1 is significantly decreased in the spinal cord of g93a sod1 transgenic mice compared to nontransgenic control.