Abstract:
:The annexin fold consists of four 70-residue domains with markedly homologous sequences and nearly identical structures. Each domain contains five helices designated A to E. Domain 2 of annexin I was obtained by chemical synthesis including ten specifically labeled residues and studied by 1H-15N NMR and circular dichroism (CD). In pure aqueous solution this annexin domain presents, at most, 25% of residual helix secondary structure compared to 75%-85% for the native helix content and thus does not constitute an autonomous folding unit. Dodecylphosphocholine (DPC) micelles were used to provide the annexin domain with non-specific hydrophobic interactions. The structuring effect of micelles was thoroughly investigated by CD and 1H-15N NMR. Most, but not all, of the native helix secondary structure was recovered at DPC saturation. NMR data made it possible to determine the intrinsic helix propensity hierarchy of the different helix segments of the domain: A approximately B approximately E > C, D. This hierarchy is remarkably well correlated with the location of the helices in the native protein since A, B, and E helices are those in contact with the remaining parts of the protein. This result tends to support the view that, for large proteins like annexins (35 kDa), high intrinsic secondary structure propensities, at least helix propensity, in selected protein segments is necessary for a correct folding process. As a consequence this also indicates that important information concerning the folding pathway is encoded in the protein sequence.
journal_name
Biochemistryjournal_title
Biochemistryauthors
Cordier-Ochsenbein F,Guerois R,Baleux F,Huynh-Dinh T,Chaffotte A,Neumann JM,Sanson Adoi
10.1021/bi960747vsubject
Has Abstractpub_date
1996-08-13 00:00:00pages
10347-57issue
32eissn
0006-2960issn
1520-4995pii
bi960747vjournal_volume
35pub_type
杂志文章相关文献
BIOCHEMISTRY文献大全abstract::High-precision studies of oxygen binding in hemoglobin (HbA0) solutions at near-physiological concentrations (2-12 mM heme; pHs 7.0-9.1; various buffers) have led to an unanticipated result: an unmeasurably low contribution from the triply ligated species. We have obtained this result from new differential oxygen-bind...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00387a038
更新日期:1987-06-30 00:00:00
abstract::More than 100 distinct mutations in the gene CuZnSOD encoding human copper-zinc superoxide dismutase (CuZnSOD) have been associated with familial amyotrophic lateral sclerosis (fALS), a fatal neuronal disease. Many studies of different mutant proteins have found effects on protein stability, catalytic activity, and me...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi500606j
更新日期:2015-01-20 00:00:00
abstract::The thermotropic behavior of aqueous dispersions of palmitoylsphingomyelin-cholesterol and lignoceryl-sphingomyelin-cholesterol mixtures has been examined by high-sensitivity differential scanning calorimetry. When less than 25 mol % cholesterol is mixed with either sphingomyelin, the calorimetric endotherm is compose...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00577a042
更新日期:1979-05-15 00:00:00
abstract::Thermal transitions of type I collagen fibrils were investigated by differential scanning calorimetry and spectrophotometry of turbidity within a wide range of external conditions. The advanced microcalorimeter allowed us to carry out the measurements at low concentrations of collagen (0.15-0.3 mg/mL). At these concen...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi980360n
更新日期:1998-06-02 00:00:00
abstract::The seven serotypes (A-G) of botulinum neurotoxins (BoNTs) function through their proteolytic cleavage of one of three proteins (SNAP-25, Syntaxin, and VAMP) that form the SNARE complex required for synaptic vesicle fusion. The different BoNTs have very specific protease recognition requirements, between 15 and 50 ami...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi052518r
更新日期:2006-03-14 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::Sin3 forms the scaffold for a multiprotein corepressor complex that silences transcription via the action of histone deacetylases. Sin3 is recruited to the DNA by several DNA binding repressors, such as the helix-loop-helix proteins of the Mad family. Here, we elaborate on the Mad-Sin3 interaction based on a binding s...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi0355645
更新日期:2004-01-13 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::The thermodynamic binding parameters and crystal structure for streptavidin-peptide complexes where the peptide sequences were obtained by random screening methods are reported. The affinities between streptavidin and two heptapeptides were determined by titrating calorimetric methods [Phe-Ser-His-Pro-Gln-Asn-Thr, Ka ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00154a004
更新日期:1992-10-06 00:00:00
abstract::The organization and interaction of chlorophylls (Chl) and the kinetics of the energy transfer in the core antenna of photosystem I (PSI) trimeric and monomeric complexes, isolated from Spirulina platensis with Triton X-100 have been studied by stationary and time-resolved fluorescence. At 295 K both complexes show an...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi970386z
更新日期:1997-11-11 00:00:00
abstract::The discovery of three mutants in the -synuclein (alphaSyn) gene and the identification of alphaSyn as the major component of Lewy body have opened a new field for understanding the pathogenesis of Parkinson's disease (PD). AlphaSyn is a natively unfolded protein with unknown function and unspecified conformational he...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi062068i
更新日期:2007-01-16 00:00:00
abstract::Membrane vesicles can be prepared from murine lymphoid cells by nitrogen cavitation and fractionated by sedimentation through nonlinear sucrose density gradients. Two subpopulations of membrane vesicles, PMI and PMII, can be distinguished on the basis of sedimentation rate. The subcellular distribution of adenylate an...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00652a026
更新日期:1976-04-06 00:00:00
abstract::The interplay between the early collapse of the unfolded state and the formation of the secondary structure has been the subject of extensive research in protein chemistry. In this study, we used the intestinal fatty acid binding protein (IFABP), a small model protein with predominately β-sheet structure, to study the...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi4014837
更新日期:2014-03-11 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::Alpha-synuclein modulates dopamine homeostasis in dopamine-producing neurons of substantia nigra, partly through regulation of human dopamine transporter (hDAT) activity. To identify the underlying mechanisms, we disrupted the modulation of hDAT activity by wild-type (wt) alpha-synuclein, and its familial Parkinson's ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi035308s
更新日期:2004-02-10 00:00:00
abstract::The nitrophorins are a family of proteins that use ferric heme to transport nitric oxide (NO) from the salivary glands of blood-sucking insects to their victims, resulting in vasodilation and reduced blood coagulation. We have refined atomic resolution structures of nitrophorin 4 (NP4) from Rhodnius prolixus complexed...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi0109257
更新日期:2001-09-25 00:00:00
abstract::Structure-function studies of antibody-antigen systems include the identification of amino acid residues in the antigen that interact with an antibody and elucidation of their individual contributions to binding affinity. We used fluorescence correlation spectroscopy (FCS) and alanine-scanning mutagenesis to character...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi0607047
更新日期:2006-11-28 00:00:00
abstract::Oligothymidylates covalently linked to iron-porphyrins were synthesized to target the nuclease activity of Fe-porphyrin to complementary polynucleotides. In the presence of oxygen and a reducing agent, oligo(dT)7 bearing the reactive group attached to the 3'-phosphate was shown to be active in the cleavage of poly(dA)...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00370a002
更新日期:1986-11-04 00:00:00
abstract::The following peptide was synthesized by classical methods in solution: Ac-Asp-Phe-Leu-Ala-Glu-Gly-Gly-Gly-Val-Arg-Gly-Pro-Arg-Val-NHCH3 (F-8). The Michaelis-Menten parameters for the hydrolysis of the Arg-Gly bond in F-8 by thrombin were determined to be Kcat = 31 X 10(-11) M [(NIH unit/L) s]-1 and KM = 310 X 10(-6) ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00287a002
更新日期:1983-08-30 00:00:00
abstract::Sir2 protein deacetylases (or sirtuins) catalyze NAD+-dependent conversion of epsilon-amino-acetylated lysine residues to deacetylated lysine, nicotinamide, and 2'-O-acetyl-ADP-ribose. Small-molecule modulation of sirtuin activity might treat age-associated diseases, such as type II diabetes, obesity, and neurodegener...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi7013294
更新日期:2007-12-18 00:00:00
abstract::By limited proteolysis of a type kappa immunoglobulin light chain (Oku) with clostripain, both the VL and CL fragments were obtained with a high yield. The unfolding and refolding by guanidine hydrochloride of light chain Oku and its VL and CL fragments were studied at pH 7.5 and 25 degrees C with circular dichroism a...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00393a015
更新日期:1987-09-22 00:00:00
abstract::The primary structure of the 43-kilodalton peripheral membrane protein (43-kDa protein) of Torpedo nicotinic postsynaptic membrane has been determined. The 43-kDa protein, which was isolated by preparative sodium dodecyl sulfate-polyacrylamide gel electrophoresis, has an amino terminus resistant to Edman degradation, ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00396a034
更新日期:1987-11-03 00:00:00
abstract::The GTP-binding proteins or GTPases comprise a superfamily of proteins that provide molecular switches in numerous cellular processes. The "GTPase switch" paradigm, in which a GTPase acts as a bimodal switch that is turned "on" and "off" by external regulatory factors, has been used to interpret the regulatory mechani...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi9006989
更新日期:2009-07-28 00:00:00
abstract::Tombusviruses use a 19 kDa protein (p19) as a suppressor of the RNA silencing pathway during infection. The p19 protein binds to short-interfering RNA (siRNA) as a dimer and shows a high selectivity for short duplex RNAs over other RNA species. Since p19 can bind to synthetic and RNA silencing generated small RNAs wit...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi800401y
更新日期:2008-08-05 00:00:00
abstract::The accessibility of the retinal Schiff base in bacteriorhodopsin was studied in the D85N/D96N mutant where the proton acceptor and donor are absent. Protonation and deprotonation of the Schiff base after pH jump without illumination and in the photocycle of the unprotonated Schiff base were measured in the visible an...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi9728396
更新日期:1998-03-17 00:00:00
abstract::Heparanase is a beta-D-endoglucuronidase that cleaves heparan sulfate (HS) and has been implicated in many important physiological and pathological processes, including tumor cell metastasis, angiogenesis, and leukocyte migration. We report herein the identification of active-site residues of human heparanase. Using P...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi002080p
更新日期:2000-12-26 00:00:00
abstract::Four murine myeloma immunoglobulins, A4, A47N, U61, and E109, have been studied for their binding affinities with inulin and a series of oligosaccharides derived from inulin. The results indicate that the combining site of these immunoglobulins shows highest complementarity for a trifructofuranosyl sequence (A4 and A4...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00636a005
更新日期:1977-08-23 00:00:00
abstract::The spin label Tempo-maleimide, when "immobilized" in hemoglobin, is shown to exhibit motional fluctuation whose amplitude and/or frequency depend on temperature and solution conditions. These motional fluctuations are observable by several electron spin resonance techniques. For desalted hemoglobin the fluctuations a...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00600a014
更新日期:1978-04-04 00:00:00
abstract::Six affinity reagents containing chemically reactive groups, either on the phosphate residue at the 5'-end or on the 5'- or 3'-end internucleoside phosphate linkages of the oligothymidylate primers, were used to covalently modify the human immunodeficiency virus type 1 reverse transcriptase (HIV-1 RT). After covalent ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00065a015
更新日期:1993-04-13 00:00:00
abstract::Amyloid-beta (Abeta) peptide deposition as fibrillar senile plaques is a key element in the pathology of Alzheimer's disease. Here we present a high-resolution structure of an Abeta amyloid fibril using magnetically aligned preparations of a central Abeta domain which forms representative amyloid fibrils. Diffraction ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi000637v
更新日期:2000-10-31 00:00:00