Abstract:
:The isolated N-terminal Src homology 3 (SH3) domain of Drosophila drk exists in equilibrium between folded and unfolded states in aqueous buffer near neutral pH. Nuclear magnetic resonance spectra recorded on both states simultaneously exhibit an approximate 1:1 ratio of protein conformations. The folded form is similar to other known SH3 structures, especially the N-terminal SH3 domain of the mammalian homologue GRB2. A stretch of sequential amide-amide nuclear Overhauser effect cross-peaks for resonances of the unfolded state is observed in a region corresponding to beta-strands in the folded state. The results suggest that turn-like conformations may be preferentially sampled in the folding pathway for this predominantly beta-structured SH3 domain. In addition, a stable turn at Leu-28 is observed in the unfolded but not in the folded state. Comparison of this unfolded form with a denatured state in 2 M guanidine hydrochloride shows that, while both are highly disordered, these states are not identical and more residual structure is present under nondenaturing conditions.
journal_name
Biochemistryjournal_title
Biochemistryauthors
Zhang O,Forman-Kay JDdoi
10.1021/bi00020a025subject
Has Abstractpub_date
1995-05-23 00:00:00pages
6784-94issue
20eissn
0006-2960issn
1520-4995journal_volume
34pub_type
杂志文章相关文献
BIOCHEMISTRY文献大全abstract::A site-specific analog of ATP, 6,6'-dithiobis (inosinyl imidodiphosphate (S2P-PNP), inactivates the ATPase activities of myosin's proteolytic fragments, heavy meromyosin (HMM) and subfragment one (SF1), by formation of mixed disulfides between the 6 position of the purine ring and certain key cysteines. The stoichiome...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00680a015
更新日期:1975-05-06 00:00:00
abstract::Helix-junction-helix (HJH) motifs are flexible building blocks of RNA architecture that help define the orientation and dynamics of helical domains. They are also frequently involved in adaptive recognition of proteins and small molecules and in the formation of tertiary contacts. Here, we use a battery of nuclear mag...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/acs.biochem.6b00285
更新日期:2016-08-16 00:00:00
abstract::The preferential interactions of proteins with solvent components were studied in concentrated aqueous solutions of the sulfate, acetate, and chloride salts of Mg2+, Ba2+, Ca2+, Mn2+ and Ni2+ [except for CaSO4, BaSO4, Mn-(OAc)2, and Ni(OAc)2], and results were compared with those of the Na+ salts. It was found that, f...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00320a004
更新日期:1984-12-04 00:00:00
abstract::Elastin binding proteins from plasma membranes of elastin-producing cells were isolated by affinity chromatography on immobilized elastin peptides. Three proteins of 67, 61, and 55 kDa were released from the elastin resin by guanidine/detergent, soluble elastin peptides, synthetic peptide VGVAPG, or galactoside sugars...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00435a014
更新日期:1989-05-02 00:00:00
abstract::The primary electron acceptor pheophytin (Pheo(D1)) plays a crucial role in regulation of forward and backward electron transfer in photosystem II (PSII). It is known that some cyanobacteria control the Pheo(D1) potential in high-light acclimation by exchanging the D1 proteins from different copies of the psbA genes. ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi9018829
更新日期:2010-01-26 00:00:00
abstract::The two disparate functions of DCoH1 (dimerization cofactor of HNF-1)/PCD (pterin-4a-carbinolamine dehydratase) are associated with a change in oligomeric state. DCoH dimers enhance the activity of the diabetes-associated transcription factor HNF-1α (hepatocyte nuclear factor-1α), while the PCD activity of DCoH1 homot...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi1015056
更新日期:2010-11-30 00:00:00
abstract::11Beta-hydroxysteroid dehydrogenase type 1 (11beta-HSD1) catalyzes the conversion of 11-dehydrocorticosterone to its active form corticosterone in rodents (or cortisone to cortisol in humans). The reductive reaction of the 11-keto to 11-hydroxyl is the pivotal switch in the activation of glucocorticoids. An excess of ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi047599q
更新日期:2005-05-10 00:00:00
abstract::A new actinoleukin-like antitumor antibiotic, BBM-928A, has been shown to interact with isolated DNA molecules. BBM-928A contains two substituted quinolines linked by a cyclic decapeptide. Quenching effects of the covalently closed superhelical PM2 DNA on the BBM-928A fluorescence revealed a strong interaction with an...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00565a012
更新日期:1980-11-25 00:00:00
abstract::The requirement of cytochrome c-550 (PSII-V) in photosystem II (PSII) has been assessed in Synechocystis sp. PCC 6803 containing mutations between Gly-351 and Thr-436 of the loop E domain of the chlorophyll a-binding protein CP47. Six photoautotrophic strains were utilized to compare the effect of removal of either th...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi980404s
更新日期:1998-10-13 00:00:00
abstract::Amyloid diseases make up a set of fatal disorders in which proteins aggregate to form fibrils that deposit in tissues throughout the body. Amyloid-associated diseases are challenging to study because amyloid formation occurs on time scales that span several orders of magnitude and involve heterogeneous, interconvertin...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/acs.biochem.9b00769
更新日期:2019-11-05 00:00:00
abstract::Assignments have been made for 11 methyl, one Gln-C gamma, one Thr-C beta, and all six Tyr-C zeta carbon resonances of ribonuclease A. These partially serve to delineate the binding sites for Cu2+, Mn2+, phosphate, cytidine and its 2'-, 3'-, and 5'-phosphates (Cyd and Cyd-2'-P, -3'-P, and -5'-P), and one or a few urea...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00310a020
更新日期:1984-07-17 00:00:00
abstract::Benzoylformate decarboxylase (BFDC) and pyruvate decarboxylase (PDC) are both thiamin diphosphate-dependent enzymes. The two share a common three-dimensional structure and catalyze a similar chemical reaction, i.e., decarboxylation of 2-keto acids. However, they vary significantly in their substrate utilization patter...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi9008402
更新日期:2009-09-08 00:00:00
abstract::Electron paramagnetic resonance (EPR) imaging utilizing stable nitroxyl radicals is a promising technique for measuring free radical distribution, metabolism, and tissue oxygenation in organs and tissues [Kuppusamy, P., Chzhan, M., Vij, K., Shteynbuk, M., Lefer, D. J., Giannella, E., & Zweier, J. L. (1994) Proc. Natl....
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi952857s
更新日期:1996-06-04 00:00:00
abstract::In the cyanobacterium Anabaena, the precursor to tRNA(Leu) has a 249-nucleotide group I intron inserted between the wobble and second bases of the anticodon; the intron self-splices during transcription in vitro [Xu, M. Q., Kathe, S. D., Goodrich-Blair, H., Nierzwicki-Bauer, S. A., & Shub, D. A. (1990) Science 250, 15...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00082a016
更新日期:1993-08-10 00:00:00
abstract::Bovine liver rhodanese, which catalyzes the transfer of sulfur atoms between a variety of sulfur donor and sulfur acceptor substrates, is inhibited by metal cyanide complexes [Volini, M., Van Sweringen, B., & Chen, F.-Sh. (1978) Arch. Biochem. Biophys. 191, 205-215]. Crystallographic studies are described which reveal...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00281a026
更新日期:1983-06-07 00:00:00
abstract::Frequency-domain fluorescence resonance energy transfer and anisotropy measurements were performed to characterize conformational dynamics of an analog of the RNase S-peptide (residues 1-20). Trp was used as a donor by replacing Phe 8, and a dansyl acceptor group was introduced at position 1 or 18. The distance-distri...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00097a009
更新日期:1993-11-23 00:00:00
abstract::Pyruvate phosphate dikinase catalyzes the interconversion of adenosine 5'-triphosphate (ATP), orthophosphate (P(i)), and pyruvate with adenosine 5'-monophosphate (AMP), pyrophosphate (PP(i)), and phosphoenolpyruvate (PEP). The Arg 561 residue of Clostridium symbiosum PPDK is contained within a Gly-rich stretch of sequ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00007a012
更新日期:1995-02-21 00:00:00
abstract::The signaling apparatus that controls bacterial chemotaxis is composed of a core complex containing chemoreceptors, the histidine autokinase CheA, and the coupling protein CheW. Site-specific spin labeling and pulsed dipolar ESR spectroscopy (PDS) have been applied to investigate the structure of a soluble ternary com...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi100055m
更新日期:2010-05-11 00:00:00
abstract::Myeloperoxidase plays a fundamental role in oxidant production by neutrophils. The enzyme uses hydrogen peroxide to oxidize chloride (Cl-), bromide (Br-), iodide (I-), and the pseudohalide thiocyanate (SCN-) to their respective hypohalous acids. This study for the first time presents transient kinetic measurements of ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi9818772
更新日期:1998-12-22 00:00:00
abstract::The inflammatory mediator nitric oxide (NO*) promotes apoptotic cell death based on morphological evidence, accumulation of the tumor suppressor p53, caspase-3 activation, and DNA fragmentation in RAW 264.7 macrophages. Since nitrosothiols may actually be the predominant form of biologically active NO* in vivo, we use...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi982292a
更新日期:1999-02-23 00:00:00
abstract::The membrane-bound closed channel structure of helices 4 and 5 (Lys-406-Asp-446) of the colicin E1 channel domain was investigated by using a site-directed fluorescence labeling technique. A bimane probe was covalently attached to a cysteine residue in a series of single-cysteine mutant proteins to scan each helix in ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi801906v
更新日期:2009-02-17 00:00:00
abstract::Recent evidence adds support to a traditional concept according to which the eukaryotic nucleus is organized into functional domains by scaffold or matrix attachment regions (S/MARs). These regions have previously been predicted to have a high potential for stress-induced duplex destabilization (SIDD). Here we report ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi026496+
更新日期:2003-01-14 00:00:00
abstract::The cardiac-specific Nkx2.5 homeodomain has been expressed as a 79-residue protein with the oxidizable Cys(56) replaced with Ser. The Nkx2.5 or Nkx2.5(C56S) homeodomain is 73% identical in sequence to and has the same NMR structure as the vnd (ventral nervous system defective)/NK-2 homeodomain of Drosophila when bound...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi050835s
更新日期:2005-09-20 00:00:00
abstract::Expression of the PSR132 protein from Dianthus caryophyllus (carnation, clover pink) is induced in response to ethylene production associated with petal senescence, and thus the protein is named petal death protein (PDP). Recent work has established that despite the annotation of PDP in sequence databases as carboxyph...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi051779y
更新日期:2005-12-20 00:00:00
abstract::Site-directed mutants were prepared of four consecutive and highly conserved residues (His-411, Asp-412, Thr-413, Tyr-414) of an extramembrane loop that connects putative transmembrane helices IX and X of subunit I of Rhodobacter sphaeroides cytochrome c oxidase. The modified enzymes were purified and analyzed by opti...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00171a019
更新日期:1994-02-08 00:00:00
abstract::Escherichia coli (A)BC excinuclease is the major enzyme responsible for removing bulky adducts, such as pyrimidine dimers and 6-4 photoproducts, from DNA. Mutants deficient in this enzyme are extremely sensitive to UV and UV-mimetic agents, but not to oxidizing agents, or ionizing radiation which damages DNA in part b...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00446a002
更新日期:1989-10-03 00:00:00
abstract::Class A beta-lactamases hydrolyze penicillins and other beta-lactams via an acyl-enzyme catalytic mechanism. Ser70 is the active site nucleophile. By constructing the S70A mutant, which is unable to form the acyl-enzyme intermediate, it was possible to make stable ES complexes with various substrates. The stability of...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi9928041
更新日期:2000-05-30 00:00:00
abstract::Novel inhibitors of lupin diadenosine 5',5'''-P(1),P(4)-tetraphosphate (Ap(4)A) hydrolase have been identified by in silico screening of a large virtual chemical library. Compounds were ranked on the basis of a consensus from six scoring functions. From the top 100 ranked compounds six were selected and initially scre...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi900813x
更新日期:2009-08-18 00:00:00
abstract::Conventional isoforms of protein kinase C (PKC) are activated when their two membrane-targeting modules, the C1 and C2 domains, bind the second messengers diacylglycerol (DG) and Ca2+, respectively. This study investigates the mechanism of Ca2+-induced binding of PKC betaII to anionic membranes mediated by the C2 doma...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi010761u
更新日期:2001-11-06 00:00:00
abstract::The pre-steady-state reaction of indole and L-serine with the alpha 2 beta 2 complex of Escherichia coli tryptophan synthase has been investigated under different premixing conditions with rapid-scanning stopped-flow (RSSF) UV-visible spectroscopy for the spectral range 300-550 nm. When alpha 2 beta 2 was mixed with i...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00357a032
更新日期:1986-05-06 00:00:00