Abstract:
:The gene encoding enzyme I of the phosphoenolpyruvate:sugar phosphotransferase system from an Escherichia coli enzyme I mutant was cloned and sequenced. The mutation was shown to be a guanine to adenine transition resulting in an altered protein in which glycine-338 was replaced by aspartic acid. The enzyme I structural gene was mutated to change glycine-338 to a variety of other amino acid residues. Fermentation tests indicated that glycine-338 could be mutated to alanine with no gross loss in phosphotransferase activity, while mutation to valine, glutamic acid, aspartic acid, arginine, histidine, or asparagine led to significant loss of activity. An expression vector for enzyme I was mutated to change glycine-338 to a variety of other amino acid residues and highly purified mutant proteins were prepared. Analysis of phosphorylation of the proteins by PEP indicated that mutation of glycine-338 to alanine had little effect on phosphorylation, mutation to valine substantially decreased phosphorylation, change to histidine or arginine drastically diminished phosphorylation, and mutation to aspartic or glutamic acids abolished phosphorylation activity. Mutation at glycine-338 influences the autophosphorylation rather than the phosphoryl transfer activity of enzyme I.
journal_name
Biochemistryjournal_title
Biochemistryauthors
Seok YJ,Lee BR,Gazdar C,Svenson I,Yadla N,Peterkofsky Adoi
10.1021/bi952052ksubject
Has Abstractpub_date
1996-01-09 00:00:00pages
236-42issue
1eissn
0006-2960issn
1520-4995pii
bi952052kjournal_volume
35pub_type
杂志文章相关文献
BIOCHEMISTRY文献大全abstract::TPPP/p25 is a brain-specific protein, which induces tubulin polymerization and microtubule (MT) bundling and is enriched in Lewy bodies characteristic of Parkinson's disease [Tirián et al. (2003) Proc. Natl. Acad. Sci. U.S.A. 100, 13976-13981]. We identified two human gene sequences, CG1-38 and p25beta, which encoded ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi061305e
更新日期:2006-11-21 00:00:00
abstract::A short chain dehydrogenase like l-threonine 3-dehydrogenase (SDR-TDH) from metagenome data (mtTDH) was identified by database mining. Its enzymatic properties suggested that mtTDH has unique characteristics relative to other SDR-TDHs, including two mesophilic and thermophilic SDR-TDHs identified in this study. The ac...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/acs.biochem.7b00832
更新日期:2017-10-31 00:00:00
abstract::Muscarinic cholinergic receptors can appear to be more numerous when labeled by [(3)H]quinuclidinylbenzilate (QNB) than by N-[(3)H]methylscopolamine (NMS). The nature of the implied heterogeneity has been studied with M(2) receptors in detergent-solubilized extracts of porcine atria. The relative capacity for [(3)H]NM...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi011746s
更新日期:2002-04-30 00:00:00
abstract::The azinomycins are a family of potent antitumor agents with the ability to form interstrand cross-links with DNA. This study reports on the unusual biosynthetic formation of the 5-methyl naphthoate moiety, which is essential for effective DNA association. While sequence analysis predicts that the polyketide synthase ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/acs.biochem.5b01050
更新日期:2016-02-02 00:00:00
abstract::Histone redistributions between endogenous DNA in calf thymus chromatin and exogenous DNA from Clostridium perfringens (69% A + T) or from Micrococcus luteus (30% A + T) induced by 0.6 M NaCl or by 2% formaldehyde were studied by thermal denaturation. The observed redistribution occurred on histone Hl when the exogeno...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00666a002
更新日期:1976-10-19 00:00:00
abstract::Dihydrouridine is absent from the tRNA of almost all hyperthermophiles and most Archaea but is ubiquitous in the tRNA of Eubacteria and Eukaryotes. In order to investigate whether this could be due to instability, the rate of ring opening of dihydrouridine was measured between 25 and 120 degrees C. The dihydrouridine ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi951577+
更新日期:1996-01-09 00:00:00
abstract::Urea lesions are formed in DNA because of free radical damage of the thymine base, and their occurrence in DNA blocks DNA polymerases, which has deleterious consequences. Recently, it has been shown that urea is capable of forming hydrogen bonding and stacking interactions with nucleobases, which are responsible for t...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/acs.biochem.6b00309
更新日期:2016-10-11 00:00:00
abstract::Protein phosphatase-1 (PP1) is an essential protein Ser/Thr phosphatase that is extraordinarily conserved from yeast to human, and Inhibitor-2 (I-2) is the most ancient of the heat-stable proteins specific for PP1. We identified novel I-2 homologues in Caenorhabditis elegans (Ce) and Xenopus laevis (Xe) and compared t...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi602369m
更新日期:2007-03-06 00:00:00
abstract::The conformational conversion of prion protein (PrP) from an alpha-helix-rich normal cellular isoform (PrPC) to a beta-sheet-rich pathogenic isoform (PrPSc) is a key event in the development of prion diseases, and it takes place in caveolae, cavelike invaginations of the plasma membrane. A peptide homologous to residu...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi700939j
更新日期:2007-10-16 00:00:00
abstract::The complex kinetic behavior commonly observed in protein folding studies suggests that a heterogeneous population of molecules exists in solution and that a number of discrete steps are involved in the conversion of unfolded molecules to the fully native form. A central issue in protein folding is whether any of thes...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi9700476
更新日期:1997-05-13 00:00:00
abstract::The enzyme endonuclease V initiates repair of deaminated DNA bases by making an endonucleolytic incision on the 3' side one nucleotide from a base lesion. In this study, we have used site-directed mutagenesis to characterize the role of the highly conserved residues D43, E89, D110, and H214 in Thermotoga maritima endo...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi060512b
更新日期:2006-08-29 00:00:00
abstract::The crystal structure of a ternary complex of the alcohol dehydrogenase from the archaeon Sulfolobus solfataricus (SsADH) has been determined at 2.3 A. The asymmetric unit contains a dimer with a NADH and a 2-ethoxyethanol molecule bound to each subunit. The comparison with the apo structure of the enzyme reveals that...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi035271b
更新日期:2003-12-16 00:00:00
abstract::Many strains of Campylobacter jejuni display modified heptose residues in their capsular polysaccharides (CPS). The precursor heptose was previously shown to be GDP-d-glycero-α-d-manno-heptose, from which a variety of modifications of the sugar moiety have been observed. These modifications include the generation of 6...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/acs.biochem.0c00096
更新日期:2020-04-07 00:00:00
abstract::Proteolytic processing of the transmembrane domain of the amyloid precursor protein (APP) is a key component of Alzheimer's disease pathogenesis. Using C-terminally tagged APP derivatives, we have identified by amino-terminal sequencing a novel cleavage site of APP, at Leu-49, distal to the gamma-secretase site. This ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi015794o
更新日期:2002-02-26 00:00:00
abstract::Electron spin polarized electron paramagentic resonance (ESP EPR) spectra were obtained with deuterated iron-removed photosynthetic bacterial reaction centers (RCs) to specifically investigate the effect of the rate of primary charge separation, metal-site occupancy, and H-subunit content on the observed P865+QA- char...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi9630319
更新日期:1997-07-15 00:00:00
abstract::The recruitment and organization of clathrin at endocytic sites first to form coated pits and then clathrin-coated vesicles depend on interactions between the clathrin N-terminal domain (TD) and multiple clathrin binding sequences on the cargo adaptor and accessory proteins that are concentrated at such sites. Up to f...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/acs.biochem.5b00065
更新日期:2015-04-28 00:00:00
abstract::[125I]Calmodulin binding to isolated rat adipocyte plasma membranes has been characterized, and the calmodulin binding proteins associated with the membrane have been identified by use of the photoaffinity cross-linker N-hydroxysuccinimidyl 4-azidobenzoate. Total binding of [125I]calmodulin to plasma membranes was ass...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00264a029
更新日期:1982-10-12 00:00:00
abstract::The relationship between GTP hydrolysis and microtubule assembly has been investigated by using a rapid filtration method. Microtubules assembled from phosphocellulose-purified tubulin, double-labeled with [gamma-32P]- and [3H]GTP, were trapped and washed free of unbound nucleotide on glass fiber filters. The transien...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00479a022
更新日期:1990-07-10 00:00:00
abstract::DNA alkylation-induced damage is one of the most efficacious anticancer therapeutic strategies. Enhanced DNA alkylation and weakened DNA repair capacity in cancer cells are responsible for the effectiveness of DNA-alkylating therapies. 5'-Flap endonuclease 1 (Fen1) is an important enzyme involved in base excision repa...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi9010754
更新日期:2009-10-27 00:00:00
abstract::Escherichia coli cAMP receptor protein (CRP) controls more than 20 genes. There are significant differences in the promoter regions in these genes. Thus, an elucidation of the mechanism of CRP action requires knowledge about the mode of selectivity in these promoters. An earlier study [Heyduk, T., & Lee, J. C. (1990) ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi952187q
更新日期:1996-01-30 00:00:00
abstract::The proton transport membrane protein bacteriorhodopsin has been biosynthetically labeled with [methyl-13C]methionine and studied by high-resolution 13C NMR after solubilization in the detergent Triton X-100. The nine methionine residues of bacteriorhodopsin give rise to four well-resolved 13C resonances, two of which...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00230a012
更新日期:1991-04-23 00:00:00
abstract::The accessibility of the asparagine-linked carbohydrate chains of human thyrotropin (hTSH) and free alpha and beta subunits was investigated by their susceptibility to endoglycosidases H and F as well as to peptide:N-glycosidase F. Iodinated hTSH or subunits were incubated with a commercial enzyme preparation containi...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00392a040
更新日期:1987-09-08 00:00:00
abstract::Neuraminidase is one of the two glycoprotein spikes protruding from the influenza virus membrane. We have determined by X-ray crystallography the native structure of B/Lee/40 neuraminidase (NA) and the structures of its crystals soaked with a substrate, N-acetylneuraminyllactose (NANL), and an inhibitor, 2-deoxy-2,3-d...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00193a002
更新日期:1994-07-12 00:00:00
abstract::An important subject for elucidating membrane protein (MP) folding is how transmembrane helices (TMHs) insert into and dissociate from membranes. We investigated helix dissociation kinetics and insertion topology by means of intervesicular transfer of the fluorophore-labeled completely hydrophobic model transmembrane ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi026191v
更新日期:2002-10-15 00:00:00
abstract::Following ribonuclease digestion of methyl-3H-labeled B77 avian sarcoma virus RNA subunits, methylated oligonucleotides were isolated by diethylaminoethylcellulose chromotogrpahy. Partial nucleotide sequences were deduced from the known enzymatic specificities of the ribonucleases. In addition to methylated nucleoside...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00622a021
更新日期:1977-02-08 00:00:00
abstract::Heme oxygenase-1 (HO-1) is an enzyme that catalyzes the oxidative degradation of heme. Since free heme is toxic to cells, rapid degradation of heme is important for maintaining cellular health. There have been useful mechanistic studies of the HO reaction based on crystal structures; however, how HO-1 recognizes heme ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi5009694
更新日期:2015-01-20 00:00:00
abstract::The fluorescence spectrum of C1 inhibitor (C1-Inh) in aqueous buffer has a maximum at 324 nm which shifts to 358 nm in 6.0 M guanidinium chloride (GdmC1), indicating that fluorescent tryptophans are buried in the native protein. When titrated with GdmC1, the fluorescence intensity, polarization, and emission maximum o...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00331a025
更新日期:1985-05-07 00:00:00
abstract::The molecular mechanism of O2 binding to hemoglobin (Hb) and myoglobin (Mb) is a long-standing issue in the field of bioinorganic and biophysical chemistry. The nature of Fe-O2 bond in oxy Hb and Mb had been extensively investigated by resonance Raman spectroscopy, which assigned the Fe-O2 stretching bands at ∼570 cm-...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/acs.biochem.8b00829
更新日期:2018-12-04 00:00:00
abstract::Binding mechanisms of ADPR-transferase to restricted double-stranded DNA fragments of SV40 and pBR322 DNA were determined by nuclease protection techniques. Top and bottom strands of double-stranded DNA were identified by specific labeling with 32P. Protection against specific exonucleases identified binding of ADPR-t...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00439a050
更新日期:1989-06-27 00:00:00
abstract::Prokaryotic and eukaryotic cytochrome c oxidases and several bacterial ubiquinol oxidases compose a superfamily of heme-copper oxidases. These enzymes are terminal components of aerobic respiratory chains, the principal energy-generating systems of aerobic organisms. Two such heme-copper oxidases are the aa3-type cyto...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00091a046
更新日期:1993-10-12 00:00:00