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1 ethyl-amino-acetato] cobalamin, (99m)Tc-PAMA-cobalamin).
2 taining cofactors that includes vitamin B12 (cobalamin).
3 ta and select heterotrophic bacteria produce cobalamin.
4 takes, whereas only the Bolus dose increased cobalamin.
5 reduces Co(II) to Co(I) of the enzyme-bound cobalamin.
6 steine and 5'-deoxyadenosine, and to require cobalamin.
7 ich it removes cyano versus alkyl ligands in cobalamin.
8 risons suggested that the protein may bind a cobalamin.
9 achieved with a predose of 20-100 ug of cold cobalamin.
10 ionine and that methylation does not require cobalamin.
11 eudocobalamin produced by cyanobacteria into cobalamin.
12 travenously before injection of (99m)Tc-PAMA-cobalamin.
13 lved in the lysosome in aiding the export of cobalamin.
14 ur-coordinate cobalamin, and five-coordinate cobalamin.
15 lamin and salvaging of cobinamide to produce cobalamin.
16 nrelated hydrophilic compounds bleomycin and cobalamin.
17 trate surrogate, but only in the presence of cobalamin.
18 at are linked to a decreased availability of cobalamin.
19 aquo-cobalamin (H2OCbl(+)) but not to other cobalamins.
20 oxic, environmentally benign cobalt complex, cobalamin (1) has been successfully utilised in organic
24 0.2 per thousand with the enzymatic cofactor cobalamin; -21.3 per thousand +/- 0.5 per thousand and -
25 between biotransformations (3.4 to 3.8) and cobalamin (3.9), but differed markedly for cobaloxime (6
27 tent superoxide scavenger, we tested whether cobalamin, a vitamin B12 vitamer, would be neuroprotecti
28 that the methyl group derives from SAM, with cobalamin acting as an intermediate carrier, and that Ma
29 %) obtained from spiked sage sample and from cobalamin also validated the accuracy of the method.
32 thod for the separation and determination of cobalamin and cobalt in kefir samples by high performanc
34 ied nitroreductase scaffold tailored to bind cobalamin and glutathione, CblC exhibits versatility in
35 ectives were to explore the concentration of cobalamin and haptocorrin in foremilk and hindmilk durin
36 and hindmilk contained comparable amounts of cobalamin and haptocorrin, but marked changes were obser
38 stal McMurdo Sound, we observed simultaneous cobalamin and iron limitation of surface water phytoplan
39 from SAM; however, the enzyme also requires cobalamin and iron-sulfur cluster cofactors for turnover
41 nine synthase MetH was robustly supported by cobalamin and p-cresolylcobamide, but not pseudocobalami
45 ents an unprecedented metabolic link between cobalamin and steroid metabolism and suggests that retro
46 hylases catalyze methyl transfer from SAM to cobalamin and then to a substrate-centered carbon or pho
49 s article, diagnosis and management of iron, cobalamin, and folate deficiencies, the most frequent ca
50 ajor cobamide groups: commercially available cobalamin, and isolated pseudocobalamin and p-cresolylco
52 ter injection of 300-500 MBq of (99m)Tc-PAMA-cobalamin, and whole-body scintigrams were obtained at 1
53 ial maternal-fetal transfer of iron, folate, cobalamin, and zinc; limited transfer of fat-soluble vit
54 rocessing, transport, and medical aspects of cobalamins; and the growing roles of heme sensor protein
59 mmonly used benzimidazolyl cobamides such as cobalamin, as the lower axial ligand is a phenolic group
61 tetrapyrroles haem, bacteriochlorophyll and cobalamin (B12 ) exhibit a complex interrelationship reg
62 e dehalogenases form a distinct subfamily of cobalamin (B12)-dependent enzymes that are usually membr
63 licates Thaumarchaeota as major producers of cobalamin based on genomic potential, cobalamin cell quo
64 tive roles played by abundant prokaryotes in cobalamin-based microbial interdependencies that sustain
65 ropose that during nutrient-rich conditions, cobalamin-based mutualism intensifies upper water column
67 tuberculosis ATR, which organizes a dynamic cobalamin binding site and exerts exquisite control over
68 esigned to perturb the interface between the cobalamin-binding domain and the PLP-binding TIM barrel
69 at a large scale domain reorientation of the cobalamin-binding domain is linked to radical catalysis.
70 29)-PLP covalent bond, dynamic motion of the cobalamin-binding domain leads to conformational samplin
72 uncovered key architectural features in the cobalamin-binding pocket that support unusual cob(II)ala
74 lamin is hampered by the high content of the cobalamin-binding protein haptocorrin, and limited data
76 Given that Mmp10 has not been annotated as a cobalamin-binding protein, these findings suggest that c
78 resents a new model in both organohalide and cobalamin (bio)chemistry that will guide future exploita
79 athway enzymes, we complete the tool set for cobalamin biosynthesis and pave the way for not only enh
80 lso contributed significantly to metagenomic cobalamin biosynthesis gene abundance throughout Souther
82 ing the connection between the occurrence of cobalamin biosynthesis genes and production of the compo
90 es that many Cyanobacteria do not synthesize cobalamin but rather produce pseudocobalamin, challengin
92 CZS and compare these changes with those of cobalamin C (cblC) deficiency, a disease with potential
100 ceptor-knockout mouse ( Cd320(-/-)) develops cobalamin (Cbl) deficiency in the nervous system, with m
101 (TCblR/CD320) for transcobalamin (TC)-bound cobalamin (Cbl) facilitates the cellular uptake of Cbl.
105 s the high-affinity binding and transport of cobalamin (CBL), or vitamin B12, across the asymmetric o
109 chemical analysis of the encoded proteins, a cobalamin (Cbl)-dependent S-adenosylmethionine (AdoMet)
111 nscobalamin (TC) saturated with vitamin B12 [cobalamin (Cbl)] and mediates cellular uptake of the vit
117 , show that a direct interaction between the cobalamin cobalt and the substrate halogen underpins cat
121 ition to a [4Fe-4S] cluster, TsrM contains a cobalamin cofactor that serves as an intermediate methyl
124 n status were excluded, ie, in those who had cobalamin concentrations below the 25th percentile.
125 itive associations in paired maternal-infant cobalamin concentrations were found at all time points.
126 ncentrations, macrocytosis, and normal serum cobalamin concentrations; only one subject was anemic.
128 echanism for how the essential tetrapyrrole, cobalamin controls the synthesis of bacteriochlorophyll,
131 Although Mtb can synthesize vitamin B(12) (cobalamin) de novo, uptake of cobalamin has been linked
135 re of this knockout and the lack of systemic cobalamin deficiency point to other mechanisms for cellu
140 nic acid metabolism through the vitamin B12 (cobalamin)-dependent enzyme methylmalonyl CoA mutase.
143 case of the pyridoxal 5'-phosphate (PLP) and cobalamin-dependent enzymes lysine 5,6-aminomutase and o
144 establishes the common features of Class III cobalamin-dependent enzymes, and reveals an unexpected d
145 ates, quantitative proteomic measurements of cobalamin-dependent enzymes, and theoretical calculation
148 DHT3 cultures, suggested the occurrence of a cobalamin-dependent estrogen methylation to form androge
149 ection, and reactivation of 5'-deoxyadenosyl cobalamin-dependent methylmalonyl-CoA mutase (MCM).
150 gen-fed conditions and predicted to encode a cobalamin-dependent methyltransferase system conserved a
151 Existing evidence points to three putative cobalamin-dependent radical S-adenosylmethionine (RS) en
152 yl group proposed to be formed using CysS, a cobalamin-dependent radical S-adenosylmethionine (SAM) m
153 In countless RiPP biosynthetic pathways, cobalamin-dependent radical SAM (B12/rSAM) enzymes play
154 is is the first in vitro reconstitution of a cobalamin-dependent radical SAM enzyme catalyzing the co
155 binding protein, these findings suggest that cobalamin-dependent radical SAM proteins are more preval
156 ible, QueG, shares distant homology with the cobalamin-dependent reductive dehalogenase (RdhA), howev
157 We show that ThnK of the three apparent cobalamin-dependent RS enzymes performs sequential methy
158 cobalt bond chemistry catalysed by the other cobalamin-dependent subfamilies, we propose that reducti
162 ng practice, we have developed a new (99m)Tc-cobalamin derivative ((99m)Tc(CO)3-[(4-amido-butyl)-pyri
163 trate that this riboswitch binds to multiple cobalamin derivatives and correlate its promiscuous beha
164 logies for the synthesis and analysis of new cobalamin derivatives as well as creative purification t
166 ing cobalamin production, but also design of cobalamin derivatives through their combinatorial use an
169 luoride occurred in incubations with reduced cobalamins (e.g., vitamin B12) indicating that biomolecu
171 requires an external supply of vitamin B12 (cobalamin) for growth, which it can obtain in stable lab
172 ae can remodel pseudocobalamin to the active cobalamin form, adding complexity to our assessment of a
176 n infants with biochemical signs of impaired cobalamin function and developmental delay or feeding di
177 n infants with biochemical signs of impaired cobalamin function, 1 intramuscular injection of cobalam
178 Infants with biochemical signs of impaired cobalamin function, defined as a plasma tHcy concentrati
179 increase in the AIMS score was higher in the cobalamin group than in the placebo group [7.0 (5.0, 9.0
181 vitamin B(12) (cobalamin) de novo, uptake of cobalamin has been linked to pathogenesis of tuberculosi
182 the same time points for the measurement of cobalamin, holotranscobalamin, total transcobalamin, tot
184 we report for the first time on (99m)Tc-PAMA-cobalamin imaging in patients with metastatic cancer dis
185 gated cancer-specific uptake of (99m)Tc-PAMA-cobalamin in 10 patients with various metastatic tumors.
186 pectroscopic studies suggest that TsrM binds cobalamin in an uncharacteristic five-coordinate base-of
193 f preference for the two biological forms of cobalamin in vitro using isothermal titration calorimetr
198 8) mug . min-1 . mL-1, P = 0.039] and infant cobalamin intake [Bolus: 0.023 (0.020, 0.027) mug; Contr
200 is characterized by a failure to metabolize cobalamin into adenosyl- and methylcobalamin, which resu
202 ellular pathway supports the assimilation of cobalamin into its active cofactor forms and delivery to
203 step is critical for assimilation of dietary cobalamin into the active cofactor forms that support th
204 ts 3-10 received between 20 and 1,000 mug of cobalamin intravenously before injection of (99m)Tc-PAMA
206 CBA1 in environmental samples suggests that cobalamin is an important nutritional factor for phytopl
209 The reactivity of the cobalt-carbon bond in cobalamins is the key to their chemical versatility, sup
211 Targeting cancer cells with vitamin B12 (cobalamin) is hampered by unwanted physiologic tissue up
216 folate (mean: +26.8%; 95% CI: 19.6, 34.5%), cobalamin (mean: +31.3%; 95% CI: 24.6, 38.3%), 25(OH)D (
217 ecause zebrafish harbor a full complement of cobalamin metabolic enzymes, we used genome editing to s
218 11 play important roles in the regulation of cobalamin metabolism as well as other pathways involved
223 he most common inborn error of intracellular cobalamin metabolism, is caused by mutations in MMACHC,
226 the elimination of the upper axial ligand in cobalamin or B12 derivatives entering the cell from circ
228 actions of inorganic Hg (Hg(II)) with methyl cobalamin or of dissolved monomethylmercury (CH3Hg) with
230 4 mo was associated with decreases in plasma cobalamin (P , 0.0001) and holotranscobalamin (P , 0.000
231 obalamin status [by the measurement of serum cobalamin, plasma total homocysteine (tHcy), and plasma
232 is involved in an early step in cytoplasmic cobalamin processing following entry of the cofactor int
233 esis and pave the way for not only enhancing cobalamin production, but also design of cobalamin deriv
235 differences at the alpha- and beta-faces of cobalamin promote the thiol oxidase activity of ceCblC b
236 roceeded through nucleophilic reactions with cobalamin rather than by an electron transfer mechanism.
238 obalamin resulted in biochemical evidence of cobalamin repletion and improvement in motor function an
239 ) indicate that transformation with isolated cobalamin resembles in vivo transformation and (iii) sug
240 lamin function, 1 intramuscular injection of cobalamin resulted in biochemical evidence of cobalamin
241 cture of the aptamer domain of this atypical cobalamin riboswitch and a model for the complete ribosw
242 l cobalamin riboswitches and the B. subtilis cobalamin riboswitch reveal that the likely basis for th
244 ive structural analyses between conventional cobalamin riboswitches and the B. subtilis cobalamin rib
247 based mutagenic approach to demonstrate that cobalamin riboswitches have a broad spectrum of preferen
250 ade ago, but its structure and mechanisms of cobalamin selectivity and translational control have rem
253 plementation changed all markers of impaired cobalamin status (ie, plasma tHcy decreased by 54%, and
254 ed psychomotor development were assessed for cobalamin status [by the measurement of serum cobalamin,
255 anges in infants, which suggests an impaired cobalamin status and indicates that nutrition from only
256 ssociation between biomarkers for folate and cobalamin status and psychomotor or mental development s
257 ng trustworthy measures of milk cobalamin to cobalamin status in healthy mothers and their children.
258 gurgitations, which suggest that an adequate cobalamin status is important for a rapidly developing n
260 nt index scores only when children with poor cobalamin status were excluded, ie, in those who had cob
266 deficiencies in these nutrients, folate and cobalamin supplementation trials are required to measure
267 ination chemistry accessible to ceCblC-bound cobalamin supports its thiol oxidase activity via a glut
269 ilable relating trustworthy measures of milk cobalamin to cobalamin status in healthy mothers and the
270 l orders of magnitude less bioavailable than cobalamin to several B12-dependent microalgae representi
271 thylbenzimidazole (DMB) (the lower ligand of cobalamin), to produce cobalamin as a cofactor for dechl
272 s assessed in infancy with the use of plasma cobalamin, total homocysteine (tHcy), and methylmalonic
273 ociation of plasma concentrations of folate, cobalamin, total homocysteine, and methylmalonic acid wi
274 lD to CblC, believed to be contiguous in the cobalamin trafficking pathway, suggests the co-option of
277 is a key chaperone involved in intracellular cobalamin trafficking, and mutations in CblD cause methy
278 CblC, a multifunctional enzyme important for cobalamin trafficking, and the activation domain of meth
285 he anaerobic pathway for the biosynthesis of cobalamin (vitamin B(12)) has remained poorly characteri
289 cessive disorder characterized by defects in cobalamin (vitamin B12) metabolism and other development
290 hin all domains of life require the cofactor cobalamin (vitamin B12), which is produced only by a sub
291 of the cobF genome region - involved in the cobalamin/vitamin B12 synthesis - and gene interruptions
294 Because Nitrobacter spp. cannot synthesize cobalamin, we postulate that they acquire it from organi
295 e]Cba and the increase of biomass-associated cobalamin were correlated with the growth of D. mccartyi
296 .0%, respectively while recovery results for cobalamin were found to be between 89.2 and 98.3% for HP
297 min B-12 status with the exception of plasma cobalamin were significantly associated with the total A
298 und that p-cresolylcobamide ([p-Cre]Cba) and cobalamin were the most abundant corrinoids in the commu
300 s A, D, B6, thiamine, riboflavin, niacin and cobalamin with insignificant amounts of pesticide residu