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2 impact upon many of the cell's more than 600 MgATP-dependent enzymes and every cellular system where
3 eotide conformation occurs transiently after MgATP binds to both NBDs with associated dimerization, a
4 verts 5-aminoimidazole ribonucleotide (AIR), MgATP, and bicarbonate into N(5)-CAIR, MgADP, and P(i).
5 bioassay, we show that equimolar MgCl(2) and MgATP solutions contain similar amounts of free Mg(2+),
6 g the fact that numeric values of Mg(2+) and MgATP concentrations necessary for complete inhibition a
10 ndent enzyme, catalyzes the bicarbonate- and MgATP-dependent carboxylation of pyruvate to oxaloacetat
11 d MgADP regulation of the K(ATP) current and MgATP regulation of the L-type Ca(2+) current in an ioni
12 catalyzes the coenzyme A (CoA)-dependent and MgATP-dependent cleavage of citrate into oxaloacetate an
13 ar solution accelerated desensitization, and MgATP reactivated TRPM8 channels in excised patches in a
14 ate the inhibition of both electron flux and MgATP hydrolysis by CN-, but not that caused by azide.
17 e with factor Xa and treatment with KNO3 and MgATP did not, however, lead to an increase in passive p
20 gments, numerous reactions utilize MgGTP and MgATP, and Mg2+ also regulates several of the phototrans
24 usoidal analysis while varying phosphate and MgATP concentrations in skinned Drosophila IFM fibers.
25 a summary of the roles of the Fe protein and MgATP hydrolysis, information on the roles of the two me
26 he concerted action of NifZ, Fe protein, and MgATP and that the action of NifZ is required before tha
31 flexural rigidity of the actin filaments at [MgATP] </= 0.1 mM and local bending of the filament fron
35 HPPK*MgAMPCPP, because MgAMPCPP is a better MgATP analogue for HPPK with respect to both binding aff
36 istent with an allosteric antagonism between MgATP in one active site and Fru-6-P in a second active
37 We investigated the interactions between MgATP, MgADP, and the sulphonylurea gliclazide with KATP
38 show that the microtubule-Eg5 complex binds MgATP tightly, followed by rapid ATP hydrolysis with a s
39 iation indicating that the myosin head binds MgATP more tightly in the order IIA (8.7 mM(-1)), IID (4
43 thway progresses such that the tightly bound MgATP enters the transition state and is hydrolyzed.
46 that K(B) channels are strongly activated by MgATP (but not ATP(4)(-)) within the physiological range
50 K(ATP) channel unitary conductance, block by MgATP and activation by MgADP, did not differ between th
51 the apparent substrate inhibition caused by MgATP binding is not seen in hybrid tetramers with only
52 block of wild-type channels was increased by MgATP, but this effect was smaller for ND channels; chan
56 ivity of the K(ATP) channel to inhibition by MgATP and this increases the whole-cell K(ATP) current.
61 d vesicles purified from the mutant catalyze MgATP-dependent [(3)H]MTX uptake at only 40% of the capa
64 d facing ATP-binding cassette configuration; MgATP reduces binding affinity via a shift to the outwar
68 g and other vital cells via the differential MgATP/ADP-dependent stimulatory actions of their tissue-
70 ough which each catalytic site cycles during MgATP hydrolysis as low --> high --> medium --> low.
72 teps following the formation of the binary E.MgATP and E.SO4(2-) complexes and preceding the release
75 rate of release of MgATP from the central E:MgATP:F6P complex 4-fold faster than the net rate consta
76 e in the rate of release of MgATP from the E:MgATP:F6P complex, independent of the concentration of F
77 resence of two endogenous channel effectors, MgATP and reduced glutathione, using the planar lipid bi
79 unliganded and binary complexes with either MgATP or pyridoxal to 2.1-, 2.6-, and 3.2-A resolutions,
81 ed in the presence of up to 60 muM of excess MgATP without nonspecific binding of MgATP to the myosin
82 gor myosin heads to thin filaments following MgATP depletion in the absence of Ca(2+) also changed th
84 ied ABCB6 showed a high binding affinity for MgATP (Kd = 0.18 muM) and an ATPase activity with a Km o
86 site of Pfk-2 by increasing its affinity for MgATP with no alteration in the conformation of residues
87 ed in detail, demonstrating low affinity for MgATP, a preference for Mg as a metal cofactor and ATP a
88 Additionally, the Michaelis constants for MgATP and sulfate (or molybdate), the dissociation const
90 r APS (at saturating MgATP) and the K(m) for MgATP (at [APS](opt)) were 4.2 microM and 0.14 mM, respe
92 enerating state by substitution of MgADP for MgATP in maximum contracting solutions resulted in the s
93 tif were removed showed a normal pattern for MgATP binding to the catalytic sites, with a clearly pre
95 e quite dynamic, many important residues for MgATP binding and phosphoryl transfer in the active site
96 f the actin filament paths suggest that for [MgATP] >/= 0.25 mM, the flexural rigidity of heavy merom
97 m oxaloacetate, the reverse reaction to form MgATP, the oxamate-induced decarboxylation of oxaloaceta
98 e accumulation of the metabolite Mg(2+) from MgATP hydrolysis is required to make dantrolene administ
100 yosin cross-bridges use chemical energy from MgATP hydrolysis to generate force and shortening in str
102 yeast guanylate kinase in the complexes GKy.MgATP, GKy.MgADP, and GKy.MgADP.[u-(13)C]GMP were determ
105 establish that only molybdate, homocitrate, MgATP, and Fe protein are essential for FeMoco maturatio
106 perties of the binary substrate complex HPPK*MgATP be represented by those of HPPK*MgAMPCPP, because
108 rometry to monitor the effect of HscA, HscB, MgATP, and MgADP on the time course of cluster transfer
112 basis, we present evidence for a hyperbolic [MgATP]-velocity relationship of heavy-meromyosin-propell
114 f protein)(-1), K(mA(MgATP)) = 0.15 mM, K(ia(MgATP)) = 1 mM, K(mB(sulfate)) = 0.16 mM, V(max,r) = 18.
116 n of Ca(2+) current during rapid increase in MgATP, and 4), demonstrates that decreased ATP/ADP ratio
117 r residues are not involved significantly in MgATP- or MgADP-binding or in interdomain communication
118 orylation were consistent with a decline in [MgATP](i) playing a prominent role in mediating inhibiti
120 eal that XK has a weak substrate-independent MgATP-hydrolyzing activity, and phosphorylates several s
124 tic values k(cat) (0.052 +/- 0.001 s(-1)), K(MgATP) (1.2 +/- 0.1 microM), K(iMgATP) (1.3 +/- 0.2 micr
125 (cat)/K(FAK-tide), while k(cat) and k(cat)/K(MgATP) were both decreased linearly at increasing solven
133 7 micromol min(-1) (mg of protein)(-1), K(mA(MgATP)) = 0.15 mM, K(ia(MgATP)) = 1 mM, K(mB(sulfate)) =
134 n with adenosine triphosphate and magnesium (MgATP) and trap both products in the crystal lattice, we
136 that under hydrolysis conditions (millimolar MgATP), not only the dimer dissociation rate increases,
137 s was maximal at concentrations of >or=10 mM MgATP and had a relatively high K(M) (MgATP) of approxim
139 g ATP hydrolysis, even in the presence of mm MgATP, and that the dissociation occurs following each h
141 ngth, 2.5 microm) from rabbit psoas muscle; [MgATP] was 4.6 mM, pH 7.1 and ionic strength was 200 mM.
142 ength 2.5 microm) from rabbit psoas muscle; [MgATP] was 4.6 mm, pH 7.1, ionic strength 200 mm and tem
143 n hybrid tetramers with only a single native MgATP binding site, the proposed kinetic mechanism is no
146 on to previous data showing a nonhyperbolic [MgATP]-velocity relationship when actin filaments are pr
150 tituted with these mutants in the absence of MgATP(2-), the condition conducive to rigor cross-bridge
155 ve forms of ATP and found that the action of MgATP(2-) and ATP(4-) differs between subtypes of P2X re
157 MgATP complex indicates a random addition of MgATP and F6P at low Mg(2+), with the rate of release of
160 98 s(-1)), an exceptionally weak affinity of MgATP for myosin (association constant, 0.2 mM(-1)), and
163 e propose that upon initial loose binding of MgATP at two nucleotide-binding domains (NBDs), together
164 e, and R92 is dispensable for the binding of MgATP but plays a role in facilitating the binding of HP
165 lanine increases the K(d) for the binding of MgATP by a factor of 3, whereas the K(d) for HP increase
168 protein and indicates that, upon binding of MgATP, the Fe protein undergoes a dramatic conformationa
169 dly accelerated the rate of tight binding of MgATP, whereas it did not effect the rate of dissociatio
172 microm eosin, indicating that the effect of MgATP is due to interactions within the nucleotide-bindi
175 her reconstituted with Tn, and the effect of MgATP on the rate constants (K(1), K(2)) was studied.
177 hosphatidylinositol abolished this effect of MgATP, suggesting that it activated TRPV1 by generating
178 activated at 20 degrees C and the effects of MgATP, phosphate (P, P(i)), and MgADP were studied on th
179 the Fe protein likely involves hydrolysis of MgATP and protein-protein interaction between the Fe pro
181 The model, implemented with inclusion of MgATP-independent detachment from the rigor state, as su
182 bition upon both [Mg(2+)](i), as an index of MgATP depletion, and channel activity in cell-attached p
194 and the native Fe protein in the presence of MgATP can reversibly cycle between a regular cubane-type
196 able states were apparent in the presence of MgATP revealing new insights into alternating access.
197 ructure of Pfk-2 obtained in the presence of MgATP shows a cation-binding site at the conserved posit
199 Crystallization of A-CAT in the presence of MgATP yielded structures with AMP or adenosine in the ca
200 INT bound was 2.6 nmol/mg in the presence of MgATP, Mg(2+), Mg-P(i), or Mg-vanadate with complete inh
203 P at low Mg(2+), with the rate of release of MgATP from the central E:MgATP:F6P complex 4-fold faster
204 (2+) is a decrease in the rate of release of MgATP from the E:MgATP:F6P complex, independent of the c
206 om, showed strong temperature sensitivity of MgATP binding and equal dissociation rates for MgATP and
207 other mutants showed lower stoichiometry of MgATP and MgADP binding, in the order Ala > Gln > Asp >
209 sized that the profilin-induced weakening of MgATP binding by actin reduces the negative free energy
211 ed in the presence of MnAMPPNP and GalNAc or MgATP and GalNAc (which resulted in bound products in th
212 as observed in the absence of either HscB or MgATP, and cluster transfer was found to be an ATP-depen
214 of the introduced tryptophans with MgADP or MgATP revealed that both Mg-nucleotide complexes bind to
215 channel and provide evidence that MgADP (or MgATP hydrolysis), acting at the regulatory subunit of t
218 hat decrease affinity for Fru-6-P (R243E) or MgATP (F76A/R77D/R82A) allowing us to systematically sim
223 of unblocked K(ATP) current at physiological MgATP concentrations correlates with the severity of the
227 f NifZ is required before that of Fe protein/MgATP, suggesting that NifZ may act as a chaperone that
230 a transient association between the reduced, MgATP-bound Fe protein and the MoFe protein and includes
233 The theoretical K(m) for APS (at saturating MgATP) and the K(m) for MgATP (at [APS](opt)) were 4.2 m
235 he turnover rate of hydrolysis of saturating MgATP in the presence of saturating drug concentrations
236 iencies were observed during drug-stimulated MgATP hydrolysis, suggesting the presence of at least th
239 otein and the binding of the first substrate MgATP, but is required for the assembling and sealing of
245 erences in the Fe protein and indicated that MgATP-bound Fe protein resembles the structure of the Fe
246 nels with diabetogenic receptors reveal that MgATP-dependent hyper-stimulation of mutant SUR can comp
251 tin-dependent carboxylases and catalyzes the MgATP-dependent carboxylation of biotin, using bicarbona
252 y for galactose metabolism by catalyzing the MgATP-dependent phosphorylation of the C-1 hydroxyl grou
254 nd Mg(2+) in addition to the one forming the MgATP complex is required to bind to cdk5/p25 for its ca
255 ove the concentration needed to generate the MgATP chelate complex, a 15-fold increase in the initial
257 stance to fluoropyrimidines by mediating the MgATP-dependent transport of 5'-fluoro-2'-deoxyuridine m
258 cations that affects the conformation of the MgATP-binding pocket leading to enzyme activation has be
259 tates indicates that the conformation of the MgATP-bound state in solution does not resemble the stru
260 variant may be a conformational mimic of the MgATP-bound state of the native Fe protein largely on th
262 no acid deletion recently suggested that the MgATP-bound state of the Fe protein may exist in a confo
265 of MRP7 is specifically associated with the MgATP-dependent transport of 17beta-estradiol-(17-beta-D
266 echanics experiments, accounts well for the [MgATP]-velocity relationship if nonlinear cross-bridge e
268 extent of increase in [Mg(2+)](i) (and thus MgATP depletion) in response to inhibition of oxidative
271 c mechanism to become random with respect to MgATP and F6P and with MgATP released from the central c
273 ng SUR1-Y356C displayed lower sensitivity to MgATP (IC(50) = 24 and 95 micromol/l for wild-type and m
274 X receptors with differential sensitivity to MgATP(2-) and regulation by Mg(2+), and demonstrate that
276 Fe-4S](1+) reduced state (Fe(red)) binds two MgATP and forms a complex with the MoFe protein, with su
278 nd ACS-AcsFCh complex remains inactive until MgATP is added, thereby converting inactive to active AC
280 nges in gj and Vj-gating were observed using MgATP or K2ATP in pipette solutions, which increases or
282 rate that acto.S237C undergoes slow and weak MgATP binding, which limits the rate of steady-state cat
285 enger, caused rapid desensitization, whereas MgATP, at concentrations that activate lipid kinases, pr
286 1) to DNA coated with gp32 and gp59, whereas MgATP induces gp32 and gp59 to dissociate, leaving gp41
289 required for the loading of gp45, along with MgATP, and also for the subsequent binding of polymerase
290 andom with respect to MgATP and F6P and with MgATP released from the central complex half as fast as
291 um or free ATP to HCV helicase competes with MgATP, the true fuel for helicase movements, and leads t
293 orsion angle, chi, was 55 +/- 5 degrees with MgATP, and 47 +/- 5 degrees with MgADP, which compares w
294 lization of the ternary complex of HPPK with MgATP and 6-hydroxymethyl-7,8-dihydropterin (HP), and is
295 helical order is substantially improved with MgATP at low temperature or with MgADP or in the absence
298 e we show that methylphosphonate reacts with MgATP to form alpha-D-ribose-1-methylphosphonate-5-triph
299 interaction of these conserved residues with MgATP is required to stabilize the occluded nucleotide c
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