Abstract:
:The substrate profiles for three uncharacterized enzymes (YcjM, YcjT, and YcjU) that are expressed from a cluster of 12 genes ( ycjM-W and ompG) of unknown function in Escherichia coli K-12 were determined. Through a comprehensive bioinformatic and steady-state kinetic analysis, the catalytic function of YcjT was determined to be kojibiose phosphorylase. In the presence of saturating phosphate and kojibiose (α-(1,2)-d-glucose-d-glucose), this enzyme catalyzes the formation of d-glucose and β-d-glucose-1-phosphate ( kcat = 1.1 s-1, Km = 1.05 mM, and kcat/ Km = 1.12 × 103 M-1 s-1). Additionally, it was also shown that in the presence of β-d-glucose-1-phosphate, YcjT can catalyze the formation of other disaccharides using 1,5-anhydro-d-glucitol, l-sorbose, d-sorbitol, or l-iditol as a substitute for d-glucose. Kojibiose is a component of cell wall lipoteichoic acids in Gram-positive bacteria and is of interest as a potential low-calorie sweetener and prebiotic. YcjU was determined to be a β-phosphoglucomutase that catalyzes the isomerization of β-d-glucose-1-phosphate ( kcat = 21 s-1, Km = 18 μM, and kcat/ Km = 1.1 × 106 M-1 s-1) to d-glucose-6-phosphate. YcjU was also shown to exhibit catalytic activity with β-d-allose-1-phosphate, β-d-mannose-1-phosphate, and β-d-galactose-1-phosphate. YcjM catalyzes the phosphorolysis of α-(1,2)-d-glucose-d-glycerate with a kcat = 2.1 s-1, Km = 69 μM, and kcat/ Km = 3.1 × 104 M-1 s-1.
journal_name
Biochemistryjournal_title
Biochemistryauthors
Mukherjee K,Narindoshvili T,Raushel FMdoi
10.1021/acs.biochem.8b00392subject
Has Abstractpub_date
2018-05-15 00:00:00pages
2857-2867issue
19eissn
0006-2960issn
1520-4995journal_volume
57pub_type
杂志文章相关文献
BIOCHEMISTRY文献大全abstract::Apolipoprotein (apo) A-I, a 243-residue, 28.1-kDa protein is a major mediator of the reverse cholesterol transport (RCT) pathway, a process that may reduce the risk of cardiovascular disease in humans. In plasma, a small fraction of lipid-free or lipid-poor apoA-I is likely a key player in the first step of RCT. There...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi047717+
更新日期:2005-03-01 00:00:00
abstract::trans-3-Chloroacrylic acid dehalogenase (CaaD) converts trans-3-chloroacrylic acid to malonate semialdehyde by the addition of H(2)O to the C-2, C-3 double bond, followed by the loss of HCl from the C-3 position. Sequence similarity between CaaD, an (alphabeta)(3) heterohexamer (molecular weight 47,547), and 4-oxalocr...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi030241u
更新日期:2004-04-13 00:00:00
abstract::Sequential 1H NMR assignments of a metallothionein from Neurospora crassa have been accomplished by the combined use of COSY, 2QF-COSY, HOHAHA, and rotating-frame NOE experiments. All potentially observable resonances were assigned except for the epsilon-NH3 group of the C-terminal lysine. 1H NOEs, when observed in th...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00433a038
更新日期:1989-04-04 00:00:00
abstract::The vanadate cofactor in vanadium chloroperoxidase has been studied using UV-VIS absorption spectroscopy. A band is present in the near-UV that is red-shifted as compared to free vanadate and shifts in both position and intensity upon change in pH. Mutation of vanadate binding residues has a clear effect on the spectr...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi9921790
更新日期:2000-02-08 00:00:00
abstract::Green fluorescent protein and its variants are frequently used as Förster (fluorescence) resonance energy transfer (FRET) pairs to determine the proximity of protein domains. We prepared fusion proteins comprising yellow fluorescent protein-Dictyostelium myosin II motor domain-cyan fluorescent protein (YFP-myosin-CFP)...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi060943u
更新日期:2006-09-05 00:00:00
abstract::This work describes the biochemical characterization of the catalytic domain of Ira2p, a Saccharomyces cerevisiae GTPase-activating protein (GAP) regulating the RAS gene products. A fragment of 383 residues (amino acids 1644-2026) was produced in Escherichia coli as glutathione S-transferase fusion protein (GST-Ira2p-...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00042a008
更新日期:1995-10-24 00:00:00
abstract::Studying the evolution of catalytically promiscuous enzymes like those from the N-succinylamino acid racemase/ o-succinylbenzoate synthase (NSAR/OSBS) subfamily can reveal mechanisms by which new functions evolve. Some enzymes in this subfamily have only OSBS activity, while others catalyze OSBS and NSAR reactions. We...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/acs.biochem.8b00088
更新日期:2018-07-03 00:00:00
abstract::Human corticosteroid-binding globulin (CBG) forms a dimer that was isolated by gel filtration, has full binding affinity and capacity, and can be dissociated to the monomer. Monomeric CBG consists of two distinct molecular variants, which were detected by polyacrylamide gel electrophoresis in the presence and absence ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00533a010
更新日期:1982-02-16 00:00:00
abstract::In iron-deficient conditions, Azomonas macrocytogenes ATCC 12334 excretes a fluorescent siderophore called azoverdin, which is composed of a six-amino-acid peptide chain linked to a chromophore. Azoverdin chelates iron(III) very strongly, solubilizing it and transporting it back into the cells using an outer-membrane ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi025990a
更新日期:2002-10-15 00:00:00
abstract::The ability of avian-specific linker histone H5, and the globular domains of H5 (GH5) and H1(0) (GH1(0), to self-associate either free in solution or when bound to DNA was investigated. All three proteins underwent a salt-dependent increase in turbidity that may be indicative of nonspecific interactions. Dithiobis(suc...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi980716v
更新日期:1998-09-08 00:00:00
abstract::Recently, we synthesized the first individual β,γ-CHX-dGTP diastereomers [(R)- or (S)-CHX, where X is F or Cl] and determined their structures in ternary complexes with DNA polymerase β (pol β). We now report stereospecificity by pol β on the mixed β,γ-CHX diastereomer pairs using nuclear magnetic resonance and on the...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi3010335
更新日期:2012-10-30 00:00:00
abstract::The oxidation of alcohol to aldehyde by horse liver alcohol dehydrogenase (LADH) requires the transfer of a hydride ion from the alcohol substrate to the cofactor nicotinamide adenine dinucleotide (NAD). A quantum mechanical tunneling contribution to this hydride transfer step has been demonstrated in a number of LADH...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi973184b
更新日期:1998-06-30 00:00:00
abstract::The binding of Ca2+ and the resulting change in catalytic specificity that allows phosphorylation of the calcium ATPase of sarcoplasmic reticulum by ATP were examined by measuring the amount of phosphoenzyme formation from [32P]ATP, or 45Ca incorporation into vesicles, after the simultaneous addition of ATP and EGTA a...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00423a018
更新日期:1988-11-15 00:00:00
abstract::The rigor complexes that formed between rabbit skeletal muscle F-actin and chicken gizzard heavy meromyosin (HMM), in which the heavy chains had been cleaved with trypsin into 24K, 50K, and 68K fragments, were examined by using the zero-length chemical cross-linker 1-ethyl-3-[3-(dimethylamino)propyl]carbodiimide (EDC)...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00430a070
更新日期:1989-02-21 00:00:00
abstract::The fluorophore 4-heptadecyl-7-hydroxycoumarin was used as a probe to study the properties of phospholipid bilayers at the lipid-water interface. To this end, the steady-state fluorescence anisotropy, the differential polarized phase fluorometry, and the emission lifetime of the fluorophore were measured in isotropic ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00324a005
更新日期:1985-01-29 00:00:00
abstract::The human antioxidant protein, HAH1, is an important participant in a Cu(I) transport chain, delivering one Cu(I) ion to the Wilson's (WND) or Menkes disease protein (MNK). Full geometry optimizations and second-derivative calculations were performed on several binding site models using the B3LYP functional to derive ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi7007195
更新日期:2007-07-31 00:00:00
abstract::New homo- and heterobifunctional cross-linking reagents have been synthesized. These reagents are based on ortho ester, acetal, and ketal functionalities that undergo acid-catalyzed dissociation but are base stable. The protein-reactive group in all the homobifunctional reagents is a maleimide group; the heterobifunct...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00432a023
更新日期:1989-03-21 00:00:00
abstract::A 16-base pair oligo(purine)-oligo(pyrimidine) sequence present in the coding region of two HIV 1 proviral genes (pol and nef) was chosen as a target for triplex-forming oligonucleotides in in vitro transcription assays. Inhibition of transcription elongation was observed with triplex-forming oligonucleotide-acridine ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi952993x
更新日期:1996-08-13 00:00:00
abstract::The newly described adapter molecule p130 Crk-associated substrate (Cas) has been reported to contribute to cytoskeletal organization through assembly of actin filaments and to be pivotal in embryonic development and in oncogene-mediated transformation. We characterized the regulation of Cas tyrosine phosphorylation i...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi991849z
更新日期:2000-05-16 00:00:00
abstract::Ran, a small nuclear GTP-binding protein, is one of the most abundant Ras-related proteins in eucaryotic cells. Ran is essential for nucleo-cytoplasmatic transport and is primarily localized in the nucleus and at the nuclear pore complex. Here, we characterize the kinetics and equilibrium of the interaction between Ra...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi970524k
更新日期:1997-10-07 00:00:00
abstract::The mechanism by which ATP binding transduces a conformational change in 70-kDa heat shock proteins that results in release of bound peptides remains obscure. Wei and Hendershot demonstrated that mutating Thr37 of hamster BiP to glycine impeded the ATP-induced conformational change, as monitored by proteolysis [(1995)...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi981510x
更新日期:1998-11-03 00:00:00
abstract::The peptide alpha 1(III)-CB9 was prepared and purified from human liver, and its amino acid sequence was determined. Automated Edman degradation of the intact peptide and peptides derived from selective cleavage with hydroxylamine and digestions with trypsin, thermolysin, and Staph V8 protease enabled determination of...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00512a040
更新日期:1981-04-28 00:00:00
abstract::Heparin was carboxyl-reduced with sodium boro[3H]hydride and converted to a mixture of oligosaccharides by treatment with nitrous acid at pH 2. The oligosaccharide mixture was aldehyde-reduced with sodium boro[3H]hydride and the mixture of products, labeled both in the hexoses formed in the carboxyl-reduction step and...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00663a006
更新日期:1976-09-07 00:00:00
abstract::Heme catabolism is an important biochemical process that many bacterial pathogens utilize to acquire iron. However, tetrapyrrole catabolites can be reactive and often require further processing for transport out of the cell or conversion to another useful cofactor. In previous work, we presented in vitro evidence of a...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/acs.biochem.6b01099
更新日期:2017-02-14 00:00:00
abstract::The biosynthesis of the C ring of the antitumor antibiotic agent, tomaymycin, is proposed to proceed through five enzyme-catalyzed steps from l-tyrosine. The genes encoding these enzymes have recently been cloned and their functions tentatively assigned, but there is limited biochemical evidence supporting the assignm...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi200947w
更新日期:2011-09-06 00:00:00
abstract::The interaction of the retroviral nucleocapsid protein (NC) with nucleic acids forms the basis of its varied roles in the replication cycle, which include binding and condensing the viral RNA within the virion, stimulation of the early steps in reverse transcription, and dissociation from RNA in the replication comple...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00126a020
更新日期:1992-03-24 00:00:00
abstract::Conformational factors that predicate selectivity for valine or isoleucine binding to IlvN leading to the regulation of aceto hydroxy acid synthase I (AHAS I) of Escherichia coli have been determined for the first time from high-resolution (1.9-2.43 Å) crystal structures of IlvN·Val and IlvN·Ile complexes. The valine ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/acs.biochem.9b00050
更新日期:2019-04-16 00:00:00
abstract::The UDP-glucuronosyltransferase (UGT) isozyme system is critical for protecting the body against endogenous and exogenous chemicals by linking glucuronic acid donated by UDP-glucuronic acid to a lipophilic acceptor substrate. UGTs convert metabolites, dietary constituents, and environmental toxicants to highly excreta...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi8006127
更新日期:2008-07-15 00:00:00
abstract::Kinetics of reduction of phototrophic bacterial flavocytochromes c by exogenous flavin semiquinones and fully reduced flavins generated by laser flash photolysis have been studied. The mechanisms of reduction of Chromatium and Chlorobium flavocytochromes c are more similar to one another than previously thought. Neith...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00327a002
更新日期:1985-03-12 00:00:00
abstract::It is known that the overall charge of a protein can change as the molecule approaches a charged object like another protein or a cell membrane. We have formalized this mechanism using a statistical mechanical framework and show how this rather overlooked interaction increases the attraction between protein molecules....
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi047630o
更新日期:2005-04-19 00:00:00