Abstract:
:In mammals, numerous precursors of antibacterial peptides with unrelated sequences share a similar prosequence of 94-114 residues, termed the cathelin-like domain. The cathelin-like domain of protegrin-3 (ProS) was overexpressed in Escherichia coli and uniformly labeled with (15)N or (15)N and (13)C, and its three-dimensional structure was determined by heteronuclear NMR at pH 6.2. Under these conditions and due to the cis-trans isomerization of the R(87)-P(88) and D(118)-P(119) amide bonds, the ProS structure was found to adopt four almost equally populated conformations in slow exchange on the NMR chemical shift time scale. The ProS structure consists of an N-terminal alpha-helix (Y(34)-N(48)) cradled by a four-stranded antiparallel beta-sheet (beta1, N(53)-L(60); beta2, K(74)-P(86); beta3, V(104)-V(111); and beta4, I(122)-C(124)). The solution structure of ProS, which is monomeric, allowed us to determine the structure of the L1 and L2 loops, which are too mobile in the crystal structure. The regions common to the solution and X-ray structures were found to be very similar. Finally, since the overall fold of ProS is very similar to that of cystatins despite a low degree of sequence identity, the ProS solution structure was compared to the solution and X-ray structures of the chicken cystatin. This comparison revealed that the structures of the L1 and L2 loops as well as that of the appending domain are quite different in the two proteins. These differences are mainly due to the high proline residue content (10%) which disorganizes the hydrogen bond network of a part of the ProS beta-sheet in contrast to that of the chicken cystatin structure.
journal_name
Biochemistryjournal_title
Biochemistryauthors
Yang Y,Sanchez JF,Strub MP,Brutscher B,Aumelas Adoi
10.1021/bi027133csubject
Has Abstractpub_date
2003-04-29 00:00:00pages
4669-80issue
16eissn
0006-2960issn
1520-4995journal_volume
42pub_type
杂志文章相关文献
BIOCHEMISTRY文献大全abstract::Sensory rhodopsin I (SRI) is a seven-transmembrane helix retinylidene protein that mediates color-sensitive phototaxis responses through its bound transducer HtrI in the archaeon Halobacterium salinarum. Deprotonation of the Schiff base attachment site of the chromophore accompanies formation of the SRI signaling stat...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi991180w
更新日期:1999-10-05 00:00:00
abstract::We have developed a simple method for reconstituting pure, integral membrane proteins into phospholipid-protein vesicles. The method does not depend on use of detergents or sonication. It has been used successfully with three different types of integral membrane proteins: UDPglucuronosyltransferase (EC 2.4.1.17) from ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00336a040
更新日期:1985-07-16 00:00:00
abstract::The antimicrobial peptide MSI-78 serves as a model system for studying interactions of bioactive peptides with membranes. Using a series of MSI-78 peptides that incorporate l-4,4,4-trifluoroethylglycine, a small and sensitive (19)F nuclear magnetic resonance probe, we investigated how the local structure and dynamics ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi200639c
更新日期:2011-07-12 00:00:00
abstract::The full three-dimensional structure of the catalytic domain of human stromelysin-1 (SCD) complexed to a novel and potent, nonpeptidic inhibitor has been determined by nuclear magnetic resonance spectroscopy (NMR). To accurately mimic assay conditions, the structure was obtained in Tris buffer at pH 6.8 and without th...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi981328w
更新日期:1998-10-06 00:00:00
abstract::The substrate analogue 2-(1-carboxy-2-phenylethyl)-4-phenylazophenol is a potent competitive inhibitor of carboxypeptidase A. Upon ligation to the active site, the azophenol moiety undergoes a shift of pKa from a value of 8.76 to a value of 4.9; this provides an index of the Lewis acidity of the active site zinc ion. ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00358a028
更新日期:1986-05-20 00:00:00
abstract::Although the short-chain dehydrogenase/reductase (SDR) superfamily contains a very large number of members defined in annotated databases and by biochemical and structural studies, very few SDR enzymes have been identified that have a homologous partner catalyzing the same reaction but with an opposite stereospecifici...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi0118005
更新日期:2002-02-26 00:00:00
abstract::2-Cys peroxiredoxins (Prxs) are a large and diverse family of peroxidases which, in addition to their antioxidant functions, regulate cell signaling pathways, apoptosis, and differentiation. These enzymes are obligate homodimers (alpha(2)), utilizing a unique intermolecular redox-active disulfide center for the reduct...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi012173m
更新日期:2002-04-30 00:00:00
abstract::The temperature dependence of steady-state kinetics has been studied with horse liver alcohol dehydrogenase (HLADH) using protonated and deuterated benzyl alcohol as substrates in methanol/water mixtures between +3 and -50 degrees C. Additionally, the competitive isotope effects, k(H)/k(T) and k(D)/k(T), were measured...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi002075l
更新日期:2001-02-20 00:00:00
abstract::The kinetics of initiation by Escherichia coli RNA polymerase on the lac L8UV5 promoter was studied by a gel retardation method that separates protein-DNA complexes from free DNA. The binding constant of the closed complex, the forward and reverse rate constants of isomerization from closed to open complex, and the fo...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00390a027
更新日期:1987-08-11 00:00:00
abstract::In previous work from our laboratory, 5-10% of the channels formed by [Val1]gramicidin A have conductances that fall outside the narrow range that conventionally has defined the standard gramicidin channel [e.g., see Russell et al. (1986) Biophys. J. 49, 673]. Reports from other laboratories, however, show that up to ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00442a007
更新日期:1989-08-08 00:00:00
abstract::P-Selectin, expressed on activated endothelial cells and platelets, is a high kinetic adhesion receptor involved in leukocyte rolling of the inflammatory response, or in tumor cell binding in the course of metastasis. Thus, P-selectin inhibition is a promising therapeutic target. The anti-inflammatory and anti-metasta...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi602347g
更新日期:2007-05-22 00:00:00
abstract::The reduction kinetics of cytochrome P-450 are known to be biphasic, with a rapid initial phase and a slower subsequent phase, both of which appear linear in semilogarithmic plots. The present report demonstrates that these biphasic reduction kinetics can be described in terms of a preequilibrium between high- and low...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00535a034
更新日期:1982-03-16 00:00:00
abstract::The flavoprotein component (SiR-FP) of the sulfite reductase from Escherichia coli is an octamer containing one FAD and one FMN per polypeptide chain. SiR-FP60, a SiR-FP fragment starting with alanine-52, was overexpressed in E. coli and purified as a monomer. The N-terminal part of the native protein contains thus al...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi9728699
更新日期:1998-04-28 00:00:00
abstract::The combination of UV/visible/near-IR variable-temperature magnetic circular dichroism (VTMCD) and EPR spectroscopies has been used to investigate the spin states and axial ligation of the heme group in oxidized, reduced, and CO-bound reduced forms of the Rhodospirillum rubrum CO oxidation transcriptional activator pr...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi991303c
更新日期:1999-09-28 00:00:00
abstract::Pea histones H2a, H2b, H3, and H4 have been isolated and their interactions studied by fluorescence anisotropy, light scatter, and circular dichroism. Histones H3 and H4 are almost identical in plants and animals, but plant histones H2a and H2b differ markedly from their mammalian counterparts. Pea H2b has a molecular...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00628a009
更新日期:1977-05-03 00:00:00
abstract::The effect of monoclonal anti-(DNA polymerase alpha) immunoglobulin G (IgG) and F(ab) fragments on DNA replication in lysolecithin-permeabilized human cells and on DNA polymerase alpha activity was determined. DNA polymerase alpha activity in vitro was inhibited equally by the same concentrations of monoclonal IgGs an...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00346a061
更新日期:1985-12-03 00:00:00
abstract::The DNA binding domain (DBD) of p53 folds by a complex mechanism that involves parallel pathways and multiple intermediates, both on- and off-pathway. This heterogeneity renders DBD particularly susceptible to misfolding and aggregation. The origins of parallel folding mechanisms are not well understood. DBD folding h...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi062106y
更新日期:2007-03-13 00:00:00
abstract::The precipitation of a monoclonal IgG2 crystalline cryoglobulin (WEB) is shown to be highly dependent on temperature and concentration. Below a critical concentration of 0.6 mg/mL there is no cryoprecipitation. The kinetics of the aggregation exhibits a concentration-dependent lag time. This evidence suggests that a n...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00579a027
更新日期:1979-06-12 00:00:00
abstract::The human, cytosolic enzyme isocitrate dehydrogenase 1 (IDH1) reversibly converts isocitrate to α-ketoglutarate (αKG). Cancer-associated somatic mutations in IDH1 result in a loss of this normal function but a gain in a new or neomorphic ability to convert αKG to the oncometabolite 2-hydroxyglutarate (2HG). To improve...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi400514k
更新日期:2013-07-02 00:00:00
abstract::The highly conserved nature and tissue specificity of the seven vertebrate beta-tubulin isotypes provide circumstantial evidence that functional differences among isotypes may exist in vivo. Compelling evidence from studies of bovine brain beta-isotypes indicated significant conformational and functional differences i...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi972763d
更新日期:1998-03-31 00:00:00
abstract::The heat production for the reaction steps of ATP hydrolysis by heavy meromyosin has been reexamined by using a reaction-type calorimeter. So far, the values reported for the heat production have varied substantially among research groups. The present results obtained in 0.3 M KCl, 10 mM MgCl2, and 20 mM Tris-HCl at p...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00518a037
更新日期:1981-07-21 00:00:00
abstract::The characteristics of tetrahydrobiopterin (H4biopterin) binding to pteridine-free recombinant macrophage inducible nitric oxide synthase expressed in Escherichia coli were investigated with a special focus given to effects caused by 2,4-diamino-5,6,7, 8-tetrahydro-6-(l-erythro-1,2-dihydroxypropyl)pteridine (4-amino-H...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi970144z
更新日期:1997-07-08 00:00:00
abstract::In Salmonella typhimurium, formation of the cobalt-carbon bond in the biosynthetic pathway for adenosylcobalamin is catalyzed by the product of the cobA gene which encodes a protein of 196 amino acid residues. This enzyme is an ATP:co(I)rrinoid adenosyltransferase which transfers an adenosyl moiety from MgATP to a bro...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi002145o
更新日期:2001-01-16 00:00:00
abstract::The interaction between the calcium binding and inhibitory components of troponin is central to the regulation of muscle contraction. In this work, two-dimensional heteronuclear single-quantum coherence nuclear magnetic resonance (2D-¿1H,15N¿-HSQC NMR) spectroscopy was used to determine the stoichiometry, affinity, an...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi992579n
更新日期:2000-03-21 00:00:00
abstract::The binding of ethidium bromide, as monitored by fluorescence enhancement, to chromatin prepared by nuclease digestion has been compared with the binding of the dye to sheared chromatin. The nuclease preparation (native chromatin) is characterized by a high affinity region of the Scatchard plot (r = 0-0.025, K1 = 1 X ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00622a002
更新日期:1977-02-08 00:00:00
abstract::The binding of Sp1 transcription factor to DNA is considered a potential target for small ligands designed to interfere with gene transcription. We attempted to distinguish the direct inhibition of the Sp1-binding to DNA in vivo (cell culture) from more indirect effects due to the network of pathways that modulate cel...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi036185e
更新日期:2004-06-15 00:00:00
abstract::From a series of 15N-resolved 3D ROESY-HMQC and 13C-resolved 3D NOESY-HMQC spectra of the FK506 binding protein (FKBP)/ascomycin complex in H2O, the locations of three tightly bound water molecules were identified. These waters are all buried within the interior of the complex and form an integral part of its structur...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00061a004
更新日期:1993-03-16 00:00:00
abstract::Despite intense interest in the proteolysis of the β-Amyloid Precursor Protein (APP) in Alzheimer's disease, how the normal processing of this type I receptor-like glycoprotein is physiologically regulated remains ill-defined. In recent years, several candidate protein ligands for APP, including F-spondin, Reelin, β1 ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi400165f
更新日期:2013-05-14 00:00:00
abstract::The ligand-binding dynamics and the reaction with O(2) of the fully (five-electron) reduced cytochrome caa(3) from the thermohalophilic bacterium Rhodothermus (R.) marinus were investigated. The enzyme is a proton pump which has all the residues of the proton-transfer pathways found in the mitochondrial-like enzymes c...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi010344h
更新日期:2001-09-04 00:00:00
abstract::The flavoenzyme tryptophan 2-monooxygenase catalyzes the oxidation of tryptophan to indoleacetamide, carbon dioxide, and water. The enzyme is a homologue of l-amino acid oxidase. In the structure of l-amino acid oxidase complexed with aminobenzoate, Tyr372 hydrogen bonds with the carboxylate of the inhibitor in the ac...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi035300i
更新日期:2003-12-02 00:00:00