Showing 1-30 of 31 results for "F0896"
H Kinoshita et al.
Journal of bioscience and bioengineering, 92(6), 556-559 (2005-10-20)
In our study on nutritional requirement for the hyphal growth of Schizophyllum commune, we found that a Trp- mutant could not grow in the L-Trp-supplied medium in the presence of L-Ser. Further growth studies showed that not only L-Ser but...
Glenn L Abbott et al.
Biochemistry, 43(6), 1507-1519 (2004-02-11)
Plasminogen activator inhibitor-1 (PAI-1) is a 43 kDa protein involved in the regulation of fibrinolysis. PAI-1 is the principal inhibitor of tissue-type plasminogen activator (t-PA), trapping the proteinase as an acyl-enzyme covalent complex (approximately 105 kDa). Four single tryptophan mutants...
Kenji Hamase et al.
Journal of chromatography. A, 1106(1-2), 159-164 (2006-01-31)
A sensitive assay for D-amino-acid oxidase (DAO) activity in mammalian tissues has been established. D-Tryptophan (D-Trp) analogs were tested as substrates for DAO, and 5-fluoro-D-tryptophan (D-FTP) was found to be the best substrate. By the enzymatic reaction, D-FTP was converted...
S Rozovsky et al.
Journal of molecular biology, 310(1), 271-280 (2001-06-23)
Product release is partially rate determining in the isomerization reaction catalyzed by Triosephosphate Isomerase, the conversion of dihydroxyacetone phosphate to D-glyceraldehyde 3-phosphate, probably because an active-site loop movement is necessary to free the product from confinement in the active-site. The...
Michael Winn et al.
Bioorganic & medicinal chemistry letters, 18(16), 4508-4510 (2008-08-01)
A one-pot biotransformation for the generation of a series of L-aminotryptophans using a readily prepared protein extract containing tryptophan synthase is reported. The extract exhibits remarkable stability upon freeze-drying, and may be stored and used for long periods after its...
Arnav Deshpande et al.
Applied and environmental microbiology, 86(9) (2020-03-08)
Tryptophan (Trp) is an essential aromatic amino acid that has value as an animal feed supplement, as the amount found in plant-based sources is insufficient. An alternative to production by engineered microbial fermentation is to have tryptophan biosynthesized by a...
Candace M Pfefferkorn et al.
Methods in molecular biology (Clifton, N.J.), 895, 197-209 (2012-07-05)
Analysis of conventional proton nuclear magnetic resonance (NMR) experiments on intrinsically disordered proteins (IDPs) is challenging because of the highly flexible and multiple rapidly exchanging conformations typifying this class of proteins. One method to circumvent some of these difficulties is...
Shwan Rachid et al.
Chemistry & biology, 13(6), 667-681 (2006-06-24)
The jaspamide/chondramide family of depsipeptides are mixed PKS/NRPS natural products isolated from marine sponges and a terrestrial myxobacterium that potently affect the function of the actin cytoskeleton. As a first step to improve production in heterologous host cells and permit...
Branka Salopek-Sondi et al.
Protein engineering, 15(11), 855-859 (2003-01-23)
The Escherichia coli L-leucine receptor is an aqueous protein and the first component in the distinct transport pathway for hydrophobic amino acids. L-leucine binding induces a conformational change, which enables the receptor to dock to the membrane components. To investigate...
Madan Katragadda et al.
Journal of medicinal chemistry, 49(15), 4616-4622 (2006-07-21)
Tryptophans at positions 4 and 7 of compstatin, a peptide complement inhibitor, are crucial for its interaction with C3. However, the nature of their involvement has not been studied to date. Here we investigate the molecular forces involved in the...
Warintra Pitsawong et al.
eLife, 7 (2018-06-15)
Protein kinases are major drug targets, but the development of highly-selective inhibitors has been challenging due to the similarity of their active sites. The observation of distinct structural states of the fully-conserved Asp-Phe-Gly (DFG) loop has put the concept of...
Xingang Zhao et al.
Journal of magnetic resonance (San Diego, Calif. : 1997), 187(1), 88-96 (2007-05-04)
5-Fluoro-dl-tryptophan (5F-Trp) is a very sensitive probe used to investigate orientation and dynamics of biomacromolecules at the in situ level. In order to establish a (19)F NMR strategy, the crystal structure and (19)F chemical shielding tensor of 5F-Trp are reported....
JinSeok Park et al.
Nature communications, 10(1), 2797-2797 (2019-06-28)
Collective cell migration occurs in many patho-physiological states, including wound healing and invasive cancer growth. The integrity of the expanding epithelial sheets depends on extracellular cues, including cell-cell and cell-matrix interactions. We show that the nano-scale topography of the extracellular...
C Minks et al.
Biochemistry, 38(33), 10649-10659 (1999-08-18)
The single tryptophan residue (Trp187) of human recombinant annexin V, containing 320 residues and 5328 atoms, was replaced with three different isosteric analogues where hydrogen atoms at positions 4, 5, and 6 in the indole ring were exchanged with fluorine....
N V Visser et al.
FEBS letters, 583(17), 2785-2788 (2009-07-22)
The apoflavodoxin protein from Azotobacter vinelandii harboring three tryptophan (Trp) residues, was biosynthetically labeled with 5-fluorotryptophan (5-FTrp). 5-FTrp has the advantage that chemical differences in its microenvironment can be sensitively visualized via (19)F NMR. Moreover, it shows simpler fluorescence decay...
C Y Wong et al.
Biochemistry, 37(25), 8938-8946 (1998-06-24)
We have biosynthetically incorporated several tryptophan analogues into three forms of Staphylococcal nuclease to investigate the spectroscopic characteristics of these "intrinsic" probes and their effect on the structure of the proteins. The set of tryptophan analogues includes 5-hydroxytryptophan, 7-azatryptophan, 4-fluorotryptophan...
Saswata Sankar Sarkar et al.
The journal of physical chemistry. B, 115(22), 7479-7486 (2011-05-18)
Tryptophan (Trp), an intrinsically fluorescent residue of proteins, has been used widely as an energy donor in fluorescence resonance energy transfer (FRET) experiments aimed at measuring intramolecular distances and distance distributions in protein folding-unfolding reactions. However, the high level of...
F Sixl et al.
The Biochemical journal, 266(2), 545-552 (1990-03-01)
Two fluorine-containing analogues of the cyclic AMP receptor protein (CRP) from Escherichia coli were prepared by biosynthetic incorporation of 5-fluorotryptophan (5-F-Trp) and 3-fluorotyrosine (3-F-Tyr). The 19F-n.m.r. spectrum of the [5-F-Trp]CRP showed two signals corresponding to the two tryptophan residues, and...
Tiqing Liu et al.
Journal of the American Chemical Society, 127(11), 4104-4113 (2005-03-18)
This work reports an explanation for the unusual monoexponential fluorescence decay of 5-fluorotryptophan (5FTrp) in single-Trp mutant proteins [Broos, J.; Maddalena, F.; Hesp, B. H. J. Am. Chem. Soc. 2004, 126, 22-23] and substantially clarifies the origin of the ubiquitous...
Dmitri Toptygin et al.
The journal of physical chemistry. B, 110(51), 26292-26302 (2006-12-22)
The B1 domain of Streptococcal protein G (GB1) is a small, thermostable protein containing a single tryptophan residue. We recorded time-resolved fluorescence of the wild-type GB1 and its 5-fluorotryptophan (5FTrp) variant at more than 30 emission wavelengths between 300 and...
Jaap Broos et al.
Journal of the American Chemical Society, 126(1), 22-23 (2004-01-08)
Tryptophan, when in a protein, typically shows multiexponential fluorescence decay kinetics. Complex kinetics prevents a straightforward interpretation of time-resolved fluorescence protein data, particularly in anisotropy studies or if the effect of a dynamic quencher or a resonance energy transfer (RET)...
A Ozarowski et al.
Biochemistry, 37(25), 8954-8964 (1998-06-24)
Phosphorescence and optically detected magnetic resonance (ODMR) measurements are reported on the triplet states of the tryptophan analogues, 7-azatryptophan (7AW), 5-hydroxytryptophan (5HW), and 4-, 5-, and 6-fluorotryptophan (4FW, 5FW, 6FW), when incorporated at position 140 of wild-type Staphylococcal nuclease (7AW-nuclease...
N Aymard et al.
Progress in neuro-psychopharmacology & biological psychiatry, 18(1), 77-86 (1994-01-01)
1. 5-Hydroxytryptamine (5-HT) is a well known neurotransmitter implicated in mental disorders, tryptophan (Trp) as amino acid precursor may be interesting. 2. A rapid and simple reversed-phase (mu Bondapac C18 as stationary phase) liquid chromatographic method with fluorimetric detection (excitation:...
T A Alekseev et al.
Bioorganicheskaia khimiia, 29(4), 384-390 (2003-09-02)
A protein corresponding to the extracellular 1-209 domain of the alpha-subunit of the nicotine acetylcholine receptor from the electric organ of Torpedo californica was prepared using the corresponding cDNA domain by culturing Escherichia coli cells on a synthetic medium supplemented...
Heidi Wood et al.
Molecular microbiology, 49(5), 1347-1359 (2003-08-28)
We previously reported that Chlamydia trachomatis expresses the genes encoding tryptophan synthase (trpA and trpB). The results presented here indicate that C. trachomatis also expresses the tryptophan repressor gene (trpR). The complement of genes regulated by tryptophan levels in C....
Bagher Amir-Heidari et al.
Organic & biomolecular chemistry, 6(6), 975-978 (2008-03-11)
Feeding 5-hydroxy and 5-fluorotryptophan to a Streptomyces coelicolor Trp-auxotrophic strain WH101 results in the production of a number of new calcium-dependent antibiotics (CDAs) possessing modified Trp residues. It is anticipated that this method could be used to modulate the biological...
P M Haggie et al.
The Journal of biological chemistry, 274(7), 3941-3945 (1999-02-06)
The enzymes of the tricarboxylic acid cycle in the mitochondrial matrix are proposed to form a multienzyme complex, in which there is channeling of substrates between enzyme active sites. However no direct evidence has been obtained in vivo for the...
Milena Opačić et al.
Biochimica et biophysica acta, 1818(3), 861-868 (2011-11-22)
The mannitol transporter EII(mtl) from Escherichia coli is responsible for the uptake of mannitol over the inner membrane and its concomitant phosphorylation. EII(mtl) is functional as a dimer and its membrane-embedded C domain, IIC(mtl), harbors one high affinity mannitol binding...
Erwin P P Vos et al.
Biochemistry, 48(23), 5284-5290 (2009-05-01)
In this work, four single tryptophan (Trp) mutants of the dimeric mannitol transporter of Escherichia coli, EII(mtl), are characterized using Trp and 5-fluoroTrp (5-FTrp) fluorescence spectroscopy. The four positions, 97, 114, 126, and 133, are located in a region shown...
Gates R Winkler et al.
The journal of physical chemistry. B, 110(13), 7058-7061 (2006-03-31)
Alpha-synuclein, the main protein component of fibrillar deposits found in Parkinson's disease, is intrinsically disordered in vitro. Site-specific information on the protein conformation has been obtained by biosynthetic incorporation of an unnatural amino acid, 5-fluorotryptophan (5FW), into the recombinant protein....

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