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1 IMPDH activity results from expression of two isoforms.
2 IMPDH catalyzes the conversion of IMP to XMP via a coval
3 IMPDH catalyzes the first dedicated step of GTP biosynth
4 IMPDH catalyzes the oxidation of IMP to XMP with the con
5 IMPDH catalyzes the oxidation of IMP to XMP with the con
6 IMPDH has an evolutionary conserved CBS subdomain of unk
7 IMPDH inhibitors have broad clinical applications in can
8 IMPDH is a promising target for chemotherapy.
9 IMPDH is a target for antitumor, antiviral, and immunosu
10 IMPDH is a target for numerous chemotherapeutic agents.
11 h the Tritrichomonas foetus and human type 2 IMPDHs using tiazofurin and ADP, which bind in the nicot
13 Several classes of drugs are known to affect IMPDH isoenzymes, including nucleotide and NAD analogs,
16 partic acid at codon 226 is conserved in all IMPDH genes, in all species examined, including bacteria
21 the four inteins gp41-1, gp41-8, NrdJ-1, and IMPDH-1 were prepared as fusion constructs with model pr
22 we show that both IMPDH type 1 (IMPDH1) and IMPDH type 2 are associated with polyribosomes, suggesti
24 IMPDH I variants rs2278293 and rs2278294 and IMPDH II variant rs11706052, whereas others have failed
26 ree crystal structures of Bacillus anthracis IMPDH, in a phosphate ion-bound (termed "apo") form and
27 This cation was not found previously in apo IMPDH, IMPDH in complex with XMP, or covalently bound in
35 e and compared with those of three bacterial IMPDHs from Campylobacter jejuni, Clostridium perfringen
36 leading to a novel and potent acridone-based IMPDH inhibitor 4m and its efficacy and GI tolerability
37 of its critical role in purine biosynthesis, IMPDH is a drug design target for anticancer, antiinfect
41 region in the substrate-free B. burgdorferi IMPDH and XMP-bound Chinese hamster IMPDH show that loop
42 NA strand cosegregation is also regulated by IMPDH and confirm the original implicit precept that imm
43 nhibitors of HMG-CoA reductase, calcineurin, IMPDH, PDE4, PI-3 kinase, hsp90, and p38 MAPK, among oth
44 esting that the previous putative P. carinii IMPDH might not represent full length, functional enzyme
48 IRES mRNA through the inhibition of cellular IMPDH activity, and induced PKR and eIF2alpha phosphoryl
49 agents, we have expressed and characterized IMPDH from the pathogenic bacterium Streptococcus pyogen
55 esting that inhibition of IMP dehydrogenase (IMPDH) and reduction of intracellular GTP levels were es
67 viously, we proposed that IMP dehydrogenase (IMPDH) was an essential factor for p53-dependent asymmet
68 domain (CBS subdomain) of IMP dehydrogenase (IMPDH), a rate-limiting enzyme of the de novo GMP biosyn
71 n of inosine-5'-monophosphate dehydrogenase (IMPDH) activity, the target enzyme of the active moiety
72 and inosine 5'-monophosphate dehydrogenase (IMPDH) are purine metabolic enzymes that function mainta
81 tion in inosine monophosphate dehydrogenase (IMPDH) enzyme activity and adverse effects caused by myc
82 s on inosine 5'-monophosphate dehydrogenase (IMPDH) for biosynthesis of guanine nucleotides and hence
84 enzyme inosine monophosphate dehydrogenase (IMPDH) forms octamers that polymerize into helical chain
85 potent inosine monophosphate dehydrogenase (IMPDH) inhibitor but the antiviral mechanisms are less u
86 pecific inosine monophosphate dehydrogenase (IMPDH) inhibitor that results in depletion of intracellu
93 enzyme inosine monophosphate dehydrogenase (IMPDH) is responsible for the rate-limiting step in guan
95 Inosine 5'- monophosphate dehydrogenase (IMPDH) is the enzyme that catalyzes the oxidation of IMP
100 tion of inosine monophosphate dehydrogenase (IMPDH) potently inhibits DNA synthesis by arresting cell
101 The inosine monophosphate dehydrogenase (IMPDH) protein GuaB2 has been identified as a drugable t
102 s on inosine 5'-monophosphate dehydrogenase (IMPDH) to obtain guanine nucleotides, and inhibition of
103 s on inosine 5'-monophosphate dehydrogenase (IMPDH) to produce guanine nucleotides and is highly susc
104 itor of inosine monophosphate dehydrogenase (IMPDH) type II (Ki = 0.3 microM) as well as an inhibitor
105 man inosine- 5'-monophosphate dehydrogenase (IMPDH) type II, an enzyme catalyzing the rate-limiting s
107 nhibits inosine monophosphate dehydrogenase (IMPDH), a rate-limiting enzyme for the de novo synthesis
108 ed that Inosine Monophosphate Dehydrogenase (IMPDH), a rate-limiting enzyme in de novo guanine nucleo
110 tors of inosine monophosphate dehydrogenase (IMPDH), the corresponding fluorine-substituted methylene
111 vity of inosine monophosphate dehydrogenase (IMPDH), the rate-limiting enzyme required for the produc
114 orms of inosine monophosphate dehydrogenase (IMPDH-1) is sufficient to cause endothelial cell cycle a
116 micking inosine monophsophate dehydrogenase (IMPDH) inhibitors has prompted us to investigate novel m
117 malian inosine-monophosphate dehydrogenases (IMPDH); most microbial IMPDHs are not sensitive to MPA.
121 lele, which encodes a catalytically disabled IMPDH(C305A) protein containing an intact Bateman domain
124 tion than reported previously for eukaryotic IMPDHs and other dehydrogenases, with the major change o
131 the protozoan parasite Tritrichomonas foetus IMPDH complexed with the inhibitor ribavirin monophospha
132 talytic core domain of Tritrichomonas foetus IMPDH in complex with IMP and beta-methylene-TAD at 2.2
133 y crystal structure of Tritrichomonas foetus IMPDH with mizoribine monophosphate (MZP) reveals a nove
137 etermined the complete kinetic mechanism for IMPDH from Tritrichomonas foetus using ligand binding, i
142 gdorferi IMPDH and XMP-bound Chinese hamster IMPDH show that loop 6 follows a similar pattern of hing
145 polypeptides coassemble to form heteromeric IMPDH complexes, suggesting that they form mixed tetrame
146 ifferentially expressed genes included HPRT, IMPDH, PAICS, and GART, all of which were expressed at a
151 rmined a minimal kinetic mechanism for human IMPDH type II using NAD analogs, isotope effects, hydrid
153 ication of low nanomolar inhibitors of human IMPDH and more importantly the first potent inhibitor of
155 rovide evidence that expression of the human IMPDH type II gene is predominantly regulated by the nuc
156 xcellent selectivity >1000-fold versus human IMPDH type 2 and good stability in mouse liver microsome
157 sensitivity between the T. foetus and human IMPDHs derive from the residues in the MPA binding site.
159 n rapidly proliferating cells, human type II IMPDH is actively targeted for immunosuppressive, antica
161 The catalytic mechanism of the human type-II IMPDH isozyme has been studied by measurement of the pH
163 ation was not found previously in apo IMPDH, IMPDH in complex with XMP, or covalently bound inhibitor
164 induces a striking conformational change in IMPDH protein in intact cells, resulting in the formatio
166 al biological function, a mouse deficient in IMPDH type I was generated by standard gene-targeting te
167 a tool for the detection of drug-inactivated IMPDH in the cells of patients receiving MPA therapy.
169 gs that decrease GMP synthesis by inhibiting IMPDH have been shown to have antiproliferative as well
171 ncreased sensitivity to a drug that inhibits IMPDH, 6-azauracil (6AU), by a mechanism that is poorly
173 found that MPA interacts with intracellular IMPDH in vivo to alter its mobility on SDS-polyacrylamid
175 of this loop between beta6 and alpha6 links IMPDH to a family of beta/alpha barrel enzymes known to
176 ferences between the bacterial and mammalian IMPDH enzymes, making it an attractive target for antimi
178 re successful in the inhibition of mammalian IMPDH are far less effective against the microbial forms
179 ecies-specific inhibitor of IMPDH; mammalian IMPDHs are very sensitive to MPA, while the microbial en
181 fective and selective inhibitor of microbial IMPDH will be developed for use as a drug against multi-
187 monstrate that S. cerevisiae harbor multiple IMPDH enzymes with varying drug sensitivities and offer
188 are also involved when IMP binds to a mutant IMPDH in which the active site Cys is substituted with a
191 show that in response to the application of IMPDH inhibitors such as 6AU, wild-type yeast strains in
192 al structures of four different complexes of IMPDH from the protozoan parasite Tritrichomonas foetus
193 ter understand the relative contributions of IMPDH types I and II and HPRT to normal biological funct
196 at in vivo deletion of the Bateman domain of IMPDH in Escherichia coli (guaB(DeltaCBS)) sensitizes th
198 de binding at the cofactor binding domain of IMPDH; however, they cannot participate in hydride trans
200 To provide a basis for the evaluation of IMPDH inhibitors as antimicrobial agents, we have expres
211 d to be a 6-8 times less potent inhibitor of IMPDH than 5 (IC50 = 0.107 microM) and was almost equall
212 A prototypic uncompetitive inhibitor of IMPDH, mycophenolic acid (MPA), is the active form of my
213 cid (MPA) is a species-specific inhibitor of IMPDH; mammalian IMPDHs are very sensitive to MPA, while
218 everal of the chemotherapeutic inhibitors of IMPDH are NAD+ or NADH analogues, no structural data for
219 of novel "allosteric-effector" inhibitors of IMPDH, to be used for the purpose of immunosuppression,
222 we have delineated the kinetic mechanism of IMPDH from the pathogenic protozoan parasite Cryptospori
227 rovide new tools for elucidating the role of IMPDH in C. parvum and may serve as potential therapeuti
228 We have determined the crystal structure of IMPDH from Borrelia burgdorferi, the bacterial spirochet
232 roscopy to investigate the ultrastructure of IMPDH macrostructures and live-cell imaging to follow cl
233 PA's antiviral activity partially depends on IMPDH but also involves stimulation of ISGs, providing a
234 hosphate dehydrogenase (IMP dehydrogenase or IMPDH) is a promising target for the development of new
236 cell lines underscored the importance of p53-IMPDH-rGNP regulation for normal tissue cell kinetics, p
237 selective urea-based inhibitor of C. parvum IMPDH (CpIMPDH) identified by high-throughput screening.
238 ntified several parasite-selective C. parvum IMPDH (CpIMPDH) inhibitors by high-throughput screening.
239 perties of the NAD binding site of C. parvum IMPDH can be exploited to develop parasite-specific inhi
240 ribe the expression of recombinant C. parvum IMPDH in an Escherichia coli strain lacking the bacteria
243 otential of two known Cryptosporidium parvum IMPDH inhibitors was examined for the B. anthracis enzym
245 effects of mycophenolic acid (MPA), a potent IMPDH inhibitor, on the cell cycle progression of activa
249 l and kinetic characteristics of S. pyogenes IMPDH are similar to other bacterial IMPDH enzymes.
252 rized and non-assembled forms of recombinant IMPDH have comparable catalytic activity, substrate affi
255 evicompactum (Pb) contains two MPA-resistant IMPDHs, PbIMPDH-A and PbIMPDH-B, which are 17- and 10(3)
257 ounds represent the first class of selective IMPDH Type II inhibitors which may serve as lead compoun
258 Here, we show that, unlike MPA-sensitive IMPDHs, formation of E-XMP* is rate-limiting for both Pb
259 tosis by mycophenolic acid (MPA), a specific IMPDH inhibitor, in interleukin-3 (IL-3)-dependent murin
260 pproach is applied to three protein systems: IMPDH, MAP kinase p38, and HIV-1 aspartyl protease.
264 hinged rigid-body motion and indicates that IMPDH may be using loop 6 to bind and sequester substrat
267 (rs2278293) and G alleles (rs2278294) in the IMPDH I variants and carriage of the G allele (rs1170605
268 carriage of the G allele (rs11706052) in the IMPDH II variant did not increase the risk of rejection
273 ins to mediate the catalytic activity of the IMPDH and GMPR provides a regulatory mechanism for balan
274 cient, Pol II initiates transcription of the IMPDH gene (IMD2) at TATA box-proximal "G" sites, produc
275 here are no other essential functions of the IMPDH homologs aside from IMP dehydrogenase activity.
281 xamined the consequences of knocking out the IMPDH type II enzyme by gene targeting in a mouse model.
282 These findings support the idea that the IMPDH isoforms are subject to distinct regulation and th
283 us evidence for an association between these IMPDH variants and renal allograft rejection and graft s
287 g studies predict that the compounds bind to IMPDH in the IMP-binding site, although interactions wit
288 an antagonist to MPA by directly binding to IMPDH and reversing the conformational changes in the pr
294 tudy DNA bank was genotyped for the variants IMPDH I rs2278293 and rs2278294 and IMPDH II rs11706052.
296 an be deleted without impairing the in vitro IMPDH catalytic activity and is the site for mutations a
297 the foundation for clinical trials in which IMPDH inhibitors are added to imatinib in patients who h
299 n of SAHA with groups known to interact with IMPDH afforded a SAHA analogue 14, which inhibits IMPDH
300 orphism and the risk of acute rejection with IMPDH I variants rs2278293 and rs2278294 and IMPDH II va
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