1
|
Oellig C, Schmid S. Polyethyleneimine as weak anionic exchanger adsorbent for clean-up in pesticide residue analysis of fruits and vegetables. J Chromatogr A 2019; 1597:9-17. [DOI: 10.1016/j.chroma.2019.03.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 03/13/2019] [Indexed: 01/28/2023]
|
2
|
Hase S, Walter R. Symmetrical disulfide bonds as S-protecting groups and their cleavage by dithiothreitol: synthesis of oxytocin with high biological activity. INTERNATIONAL JOURNAL OF PEPTIDE AND PROTEIN RESEARCH 2009; 5:283-8. [PMID: 4759570 DOI: 10.1111/j.1399-3011.1973.tb03463.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|
3
|
Kozel TR, Thorkildson P, Brandt S, Welch WH, Lovchik JA, AuCoin DP, Vilai J, Lyons CR. Protective and immunochemical activities of monoclonal antibodies reactive with the Bacillus anthracis polypeptide capsule. Infect Immun 2006; 75:152-63. [PMID: 17060470 PMCID: PMC1828423 DOI: 10.1128/iai.01133-06] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Bacillus anthracis is surrounded by a polypeptide capsule composed of poly-gamma-d-glutamic acid (gammaDPGA). In a previous study, we reported that a monoclonal antibody (MAb F26G3) reactive with the capsular polypeptide is protective in a murine model of pulmonary anthrax. The present study examined a library of six MAbs generated from mice immunized with gammaDPGA. Evaluation of MAb binding to the capsule by a capsular "quellung" type reaction showed a striking diversity in capsular effects. Most MAbs produced a rim type reaction that was characterized by a sharp increase followed directly by a decrease in refractive index at the capsular edge. Some MAbs produced a second capsular reaction well beneath the capsular edge, suggesting complexity in capsular architecture. Binding of MAbs to soluble gammaDPGA was assessed by a fluorescence perturbation assay in which a change in the MAb intrinsic fluorescence produced by ligand binding was used as a reporter for antigen-antibody interaction. The MAbs differed considerably in the complexity of the binding curves. MAbs producing rim type capsule reactions typically produced the more complex binding isotherms. Finally, the protective activity of the MAbs was compared in a murine model of pulmonary anthrax. One MAb was markedly less protective than the remaining five MAbs. Characteristics of the more protective MAbs included a relatively high affinity, an immunoglobulin G3 isotype, and a complex binding isotherm in the fluorescence perturbation assay. Given the relatively monotonous structure of gammaDPGA, the results demonstrate a striking diversity in the antigen binding behavior of gammaDPGA antibodies.
Collapse
Affiliation(s)
- Thomas R Kozel
- Department of Microbiology and Immunology/320, University of Nevada School of Medicine, Reno, NV 89557, USA.
| | | | | | | | | | | | | | | |
Collapse
|
4
|
Pettit GR, Knight JC, Herald DL, Davenport R, Pettit RK, Tucker BE, Schmidt JM. Isolation of labradorins 1 and 2 from Pseudomonas syringae pv. coronafaciens. JOURNAL OF NATURAL PRODUCTS 2002; 65:1793-1797. [PMID: 12502316 DOI: 10.1021/np020173x] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Investigation of Pseudomonas syringae pv. coronafaciens cancer cell growth inhibitory constituents led to the isolation of 2-isobutyl-5-(3-indolyl)oxazole (1) and 2-n-pentyl-5-(3-indolyl)oxazole (2f), designated labradorins 1 (1) and 2 (2f), related to pimprinine (2a). The structures were deduced by spectroscopic techniques and X-ray crystal structure determinations. Labradorin 1 (1) afforded GI(50) microg/mL values of 9.8 and 6.2 against the human cancer cell lines NCI-H 460 (lung-NSC) and BXPC-3 (pancreas-a).
Collapse
Affiliation(s)
- George R Pettit
- Cancer Research Institute and Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ 85287-2404, USA
| | | | | | | | | | | | | |
Collapse
|
5
|
Sorochinskaya EI, Anokhina VV, Belokrylov GA, Popova OY, Molchanova IV. Immunoactive peptides. Part V. A thy-1 antigen 66–70-pentapeptide fragment selectively stimulates phagocytosis. Pharm Chem J 1999. [DOI: 10.1007/bf02510043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
6
|
Tzougraki C, Dairman WM, Makofske RC, Aeppli L, Meienhofer J. Synthesis of a potent enkephalin analog, Tyr-D-Thr-Gly-Phe-delta 3 Pro-NH2, and some of its biological activities. INTERNATIONAL JOURNAL OF PEPTIDE AND PROTEIN RESEARCH 1986; 28:370-8. [PMID: 3793369 DOI: 10.1111/j.1399-3011.1986.tb03268.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The enkephalin analog, H-Tyr-D-Thr-Gly-Phe-delta 3 Pro-NH2 X HCl (VI) ([D-Thr2, delta 3 Pro5]-enkephalinamide), has been synthesized by conventional methods in solution and purified to homogeneity by reversed phase HPLC. The analog is a potent analgesic agent. For evaluation of some of its biological activity a related compound [D-Thr2, Thz5]-enkephalinamide (XI) was also synthesized in solution. Anti-diarrhea activity was evaluated in mice by the intravenous route for anti-DL-5-hydroxytryptophan (5-HTP) induced diarrhea activity. Analgesic activity was assayed by the method of Nilsen in mice using the intravenous route, and by a modified tail flick test in rats and the acetic acid writhing test in mice following subcutaneous administration. Within the constraints of the assays the two analogs are approximately equipotent. Both are less active than [D-Ala2, MePhe4, Met(0)ol]-enkephalinol (XII). Earlier receptor binding studies of compound XI indicated enhanced affinity for the mu receptor and little for the delta receptor. By comparison this may also be the case for compound VI.
Collapse
|
7
|
|
8
|
Heimer EP, Gallo-Torres HE, Felix AM, Ahmad M, Lambros TJ, Scheidl F, Meienhofer J. Synthesis of analogs and oligomers of N-(2-aminoethyl)glycine and their gastrointestinal absorption in the rat. INTERNATIONAL JOURNAL OF PEPTIDE AND PROTEIN RESEARCH 1984; 23:203-11. [PMID: 6698723 DOI: 10.1111/j.1399-3011.1984.tb02711.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The synthesis of a series of analogs and oligomers of N-(2-aminoethyl)glycine (Aeg) are described. The gastrointestinal absorption of these compounds was determined after intragastric administration. Analogs of Aeg bearing a substituent at the amino or carboxyl functions were absorbed to a lesser extent than the parent compound. In contrast, the di- and tetra-oligomers of Aeg were more rapidly absorbed. Total absorption of these compounds was observed within 2 h after intragastric administration.
Collapse
|
9
|
Di Bello C, Lucchiari A, Buso O, Tonellato M. Semisynthetic studies on bovine pancreatic ribonuclease. INTERNATIONAL JOURNAL OF PEPTIDE AND PROTEIN RESEARCH 1984; 23:61-71. [PMID: 6698716 DOI: 10.1111/j.1399-3011.1984.tb02693.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The S-peptide of the enzyme bovine pancreatic ribonuclease has been used as a model for covalent semisynthesis. Methods for side-chain protection, enzymatic cleavage of the peptide chain at the level of the single arginine-10 and for selective deprotection of the alpha-carboxyl function of this residue, have been examined. The partially protected [1-10] sequence has been coupled to a solid-phase generated [11-15] sequence attached to the polymer. After deblocking from the solid-support, the [1-15] semisynthetic peptide was complexed with native S-protein to give a complex with high biological activity.
Collapse
|
10
|
Sigler GF, Fuller WD, Chaturvedi NC, Goodman M, Verlander M. Formation of oligopeptides during the synthesis of 9-fluorenylmethyloxycarbonyl amino acid derivatives. Biopolymers 1983. [DOI: 10.1002/bip.360221002] [Citation(s) in RCA: 65] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
11
|
Di Bello C, Andini S, Ferrara L, Napolitano R, Paolillo L. Synthesis, purification and conformational studies on enkephalin derivatives containing gamma-amino-n-butyric acid. INTERNATIONAL JOURNAL OF PEPTIDE AND PROTEIN RESEARCH 1982; 20:455-67. [PMID: 7174210 DOI: 10.1111/j.1399-3011.1982.tb03068.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The solid-phase synthesis of several analogs of enkephalin containing gamma-amino-butyric acid is reported. Synthetic strategies, purification methods, chemical and physicochemical characterization are discussed. The n.m.r. data suggest for some of the analogs structural features similar to the opioids.
Collapse
|
12
|
Gade W, Brown JL. Purification, characterization and possible function of alpha-N-acylamino acid hydrolase from bovine liver. BIOCHIMICA ET BIOPHYSICA ACTA 1981; 662:86-93. [PMID: 7306559 DOI: 10.1016/0005-2744(81)90227-8] [Citation(s) in RCA: 39] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
|
13
|
Hawker JR, Oró J. Cyanamide mediated syntheses of peptides containing histidine and hydrophobic amino acids. J Mol Evol 1981; 17:285-94. [PMID: 7277511 DOI: 10.1007/bf01795750] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Using the model of a primitive earth evaporation pond, the synthesis of three histidyl peptides in yields up to 11% was demonstrated when aqueous solutions of histidine, leucine, ATP, cyanamide, and MgCl2 were evaporated and heated for 24 h at 80 degrees C. In addition, peptides were formed in yields of up to 56%, 35%, and 21%, respectively for phenylalanine, leucine, and alanine when aqueous solutions of the appropriate amino acid were evaporated and heated with cyanamide and one or more of the following components: ATP, AMP, 4-amino-5-imidazole carboxamide, or MgCl2. The greatest peptide yield occurred at pH 3. But peptide formation was demonstrated for a system of Leu, cyanamide, and MgCl2 adjusted to pH 7 with NH4OH. Peptide synthesis was also studied in the presence of CaCl2, ZnCl2, different adenosine nucleotides, and UTP to compare their effects on peptide synthesis. The optimum conditions for cyanamide mediated peptide synthesis were also studied in terms of pH, reaction time, reaction temperature, and cyanamide concentration. The major side product in nearly all reactions studied appears to be an amino acid-cyanamide adduct. Peptides were analyzed and identified by thin layer chromatography, acid hydrolysis, and enzymatic degradation.
Collapse
|
14
|
Benedetti E, Di Blasio B, Pavone V, Pedone C, Felix A, Goodman M. Conformational studies of peptides: Crystal and molecular structures ofL-3,4-dehydroproline and itst-butoxycarbonyl and acetyl amide derivatives. Biopolymers 1981; 20:283-302. [DOI: 10.1002/bip.1981.360200204] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/1980] [Accepted: 07/25/1980] [Indexed: 11/08/2022]
|
15
|
Lee SL, Veis A. Cooperativity in calcium ion binding to repetitive, carboxylate-serylphosphate polypeptides and the relationship of this property to dentin mineralization. INTERNATIONAL JOURNAL OF PEPTIDE AND PROTEIN RESEARCH 1980; 16:231-40. [PMID: 6780483 DOI: 10.1111/j.1399-3011.1980.tb02957.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Analogs of phosphophoryn, a calcium-binding phosphorylated protein found in mineralized dentin, were synthesized by solid phase peptide synthesis. The dentin phosphophoryn appears to contain some sequence blocks of (Asp-PhosphoSer)n. As this sequence is difficult to synthesize, polymers of (alpha-L-Glu-L-Ser) were prepared. The 30-peptide, (alpha-L-Glu-L-Ser)15, was phosphorylated by reaction with orthophosphoric acid in the presence of trichloroacetonitrile in anhydrous dimethylsulfoxide. Calcium ion binding studies were carried out with both the 30-peptide and phosphorylated 30-peptide. The conformation of the original 30-peptide, (Glu-Ser)15, was examined, in the presence and absence of calcium ion, by circular dichroism measurements. Purified bovine phosphophoryn, previously studied by the same techniques, was partially dephosphorylated by alkaline phosphatase, and its calcium ion binding properties were determined. Dephosphorylation to 31% of the initial phosphorus content reduced the number of high affinity sites to approximately 30% of the initial value. However, the stoichiometry of binding indicated that both phosphate and carboxylate groups participate in the high affinity binding and that the binding constant was decreased only slightly. Partial phosphorylation of the 30-mer raised the calcium binding constant, Ka, from 2.1 x 10(2) to 3.3 x 10(3) M-1 and increased the amount of binding from an electrostatic equivalent number of sites to a stoichiometric equivalent number. Concomitant with binding, there was a transition from random coil to beta-like structure. These data suggest that the repetitive (Asp-PhosphoSer)n regions in phosphophoryn and the (Glu-PhosphoSer)n sequence of the synthetic polymer have special conformations which favor the unidentate binding of calcium to the carboxyl groups and phosphate groups. and which enhance the binding affinities of the carboxyl groups in such sequences in a cooperative fashion.
Collapse
|
16
|
Fink ML, Chung SI, Folk JE. gamma-Glutamylamine cyclotransferase: specificity toward epsilon-(L-gamma-glutamyl)-L-lysine and related compounds. Proc Natl Acad Sci U S A 1980; 77:4564-8. [PMID: 6107907 PMCID: PMC349884 DOI: 10.1073/pnas.77.8.4564] [Citation(s) in RCA: 67] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
gamma-Glutamylamine cyclotransferase, an enzyme that catalyzes the conversion of L-gamma-glutamylamines to free amines and 5-oxo-L-proline, was found in rabbit kidney and in various other tissues. The specificity of this enzyme indicates that it functions in the metabolism of products of transglutaminase action; among its substrates are epsilon-(L-gamma-glutamyl)-L-lysine, a derivative of this peptide in which the alpha-amino and carboxyl groups of the lysine moiety are blocked, and L-gamma-glutamyl-polyamine derivatives.
Collapse
|
17
|
Tzougraki C, Makofske RC, Gabriel TF, Michalewsky J, Meienhofer J, Li CH. Synthesis of human beta-endorphin in solution using benzyl-type side chain protective groups. INTERNATIONAL JOURNAL OF PEPTIDE AND PROTEIN RESEARCH 1980; 15:377-98. [PMID: 6252107 DOI: 10.1111/j.1399-3011.1980.tb02914.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A solution synthesis of human beta-endorphin (beta-EP) was carried out by condensation of protected peptide segments bearing N alpha-tert.-butyloxycarbonyl groups and benzyl-derived groups for the protection of functionalities in amino acid side chains. Five intermediate segments were assembled in a stepwise manner starting at the carboxyl terminus. Thus, the segment of sequence region (27-31) was coupled to segment (22-26) by the azide method. Segment (19-21) was incorporated into the growing chain by azide coupling, and segment (10-18) by dicyclohexylcarbodiimide coupling in the presence of 1-hydroxybenzotriazole (DDC-HOBt). Solubility problems in condensing the ensuing 22-peptide with segment (1-9) by DDC-HOBt were overcome by using a dimethylformamidephenol mixture as a solvent. Protecting group cleavage by Na in liquid NH3 was much superior to liquid HF which gave rise to many decomposition products. Homogeneous betah-EP indistinguishable from authentic material in physiochemical and biological properties, was obtained in a single preparative reversed phase liquid chromatographic step after protecting group cleavage.
Collapse
|
18
|
Transglutaminase amine substrates for photochemical labeling and cleavable cross-linking of proteins. J Biol Chem 1980. [DOI: 10.1016/s0021-9258(19)86159-8] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
|
19
|
Karn RC, Friedman RD, Merritt AD. Human salivary proline-rich (Pr) proteins: a posttranslational derivation of the phenotypes. Biochem Genet 1979; 17:1061-77. [PMID: 540000 DOI: 10.1007/bf00504345] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The acidic proline-rich proteins (Pr) showing genetic polymorphism were purified from human parotid salivas by gel filtration and ion exchange chromatography. Molecular weight determinations, amino acid composition analyses, and polypeptide mapping experiments indicate that the Pr 3 protein is a fragment of the Pr 1 protein. Studies of a parotid saliva factor capable of converting Pr 1 to Pr 3 and Pr 2 to Pr 4 indicate that Pr 3 and Pr 4 are generated from Pr 1 and Pr 2, respectively. Evidence suggests that the converting factor is a protease capable of posttranslationally cleaving Pr 1 and Pr 2, the primary or derived products of alleles Pr1 and Pr2.
Collapse
|
20
|
Paddock GV, Wilson GB, Wang AC. Contribution of hydrolyzed nucleic acids and their constituents to the apparent amino acid composition of biological compounds. Biochem Biophys Res Commun 1979; 87:946-52. [PMID: 454437 DOI: 10.1016/0006-291x(79)92048-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
21
|
Purification and partial characterization of alpha-N-acylpeptide hydrolase from bovine liver. J Biol Chem 1978. [DOI: 10.1016/s0021-9258(17)34649-5] [Citation(s) in RCA: 73] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
22
|
Felix AM, Wang CT, Liebman AA, Delaney CM, Mowles T, Burghardt BA, Charnecki AM, Meienhofer J. Synthesis, biological activity, and tritiation of L-3, 4-dehydroproline-containing peptides. INTERNATIONAL JOURNAL OF PEPTIDE AND PROTEIN RESEARCH 1977; 10:299-310. [PMID: 591179 DOI: 10.1111/j.1399-3011.1977.tb02801.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A series of analogs of thyroliberin (TRH) ([L-delta3Pro3]-TRH, [D-delta3Pro3]-TRH, [L-3-MeHis2, L-delta3Pro3]-TRH) in which proline was replaced by L- or D-3, 4-dehydroproline was synthesized. The analogs exhibited approximately the same biological activity as the corresponding proline-containing peptides. These analogs and others in which 3, 4-dehydroproline is present at the NH2-terminal, COOH-terminal or internal positions in the peptide were successfully reduced with deuterium or tritium to provide the 3, 4-2H2-proline or 3,4-3H2-proline analogs, respectively, with near theoretical values of substitution. A novel procedure for the chemical resolution of DL-3, 4-dehydroproline is also described.
Collapse
|
23
|
|
24
|
Wilson GB, Welch TM, Fudenberg HH. Tx: a component in human dialyzable transfer factor that induces cutaneous delayed hypersensitivity in guinea pigs. CLINICAL IMMUNOLOGY AND IMMUNOPATHOLOGY 1977; 7:187-202. [PMID: 862252 DOI: 10.1016/0090-1229(77)90047-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
25
|
Coduti PL, Bush CA. Structure determination of N-acetyl amino sugar derivatives and disaccharides by gas chromatography and mass spectroscopy. Anal Biochem 1977; 78:21-38. [PMID: 848743 DOI: 10.1016/0003-2697(77)90004-5] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
26
|
Schwabe C, McDonald JK. Demonstration of a pyroglutamyl residue at the N terminus of the B-chain of porcine relaxin. Biochem Biophys Res Commun 1977; 74:1501-4. [PMID: 843375 DOI: 10.1016/0006-291x(77)90612-x] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
27
|
Knights RJ, Gross M, Folk JE. Identification and quantitative analysis of alkyl isocyanates as their urea derivatives. Anal Biochem 1977; 77:176-84. [PMID: 831570 DOI: 10.1016/0003-2697(77)90303-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
28
|
Abstract
The substrate specificity of tonin from rat submaxillary gland was examined with a series of synthetic peptides encompassing the C-terminus of the decapeptide substrate angiotensin I. In contrast to angiotensin I-converting enzyme from plasma or lung, only angiotensin I, (des-Asp1)-angiotensin I, and (des-Asp1, des-Arg2)-angiotensin I are substrates of tonin with Km values of 34.5 muM, 39.3 muM, and 54.4 muM, respectively, while the shorter C-terminal peptides are not hydrolyzed. Thus, the N-terminal sequence extending from position 1 to 3 is the enzymatic binding site for tonin. Turnover numbers of 33.4 sec-1, 42.8 sec-1, and 6.5 sec-1 are observed for the hydrolysis of angiotensin I, (des-Asp1)-angiotensin I, and (des-Asp1, des-Arg2)-angiotensin I, respectively. The relative percentage rates of hydrolysis (proportional to V/Km) at low substrate concentrations ([S] less than less than Km) are almost identical for (des-Asp1)-angiotensin I, angiotensin I, and the tetradecapeptide substrate, indicating that these three peptides are equally good substrates at low physiological concentrations. The observed high specificity of the enzyme lends support to the possible important role of tonin for local conversion in tissue. The conversion of (des-Asp1)-angiotensin I to (des-Asp1)-angiotensin II (angiotensin III) is of particular interest in relation to the recently suggested, potential role of the latter peptide in aldosterone release.
Collapse
|
29
|
Faull KF, Schier GM, Schlesinger P, Halpern B. The mass spectrometric identification of dipeptides in the urine of a patient suffering from chronic skin ulceration and oedema. Clin Chim Acta 1976; 70:313-21. [PMID: 954214 DOI: 10.1016/0009-8981(76)90433-2] [Citation(s) in RCA: 40] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The identification of a complex ninhydrin positive mixture present in the urine of a child suffering from chronic skin ulceration and oedema by direct chemical ionisation mass spectrometric analysis is described. The compounds were shown to be dipeptides, of which glycylproline was the major constituent. At least 15 dipeptides were identified in the urine, most of which contained proline or hydroxyproline in the carboxy terminal position. The results suggested that the patient suffered from a defect in collagen metabolism. This hypothesis was subsequently confirmed by a grossly diminished level of prolidase in cultured fibroblasts and erythrocytes.
Collapse
|
30
|
Ehler KW, Orgel LE. N,N'-carbonyldiimidazole-induced peptide formation in aqueous solution. BIOCHIMICA ET BIOPHYSICA ACTA 1976; 434:233-43. [PMID: 938667 DOI: 10.1016/0005-2795(76)90055-6] [Citation(s) in RCA: 73] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
|
31
|
De Préval C, Fougereau M. Specific interaction between VH and VL regions of human monoclonal immunoglobulins. J Mol Biol 1976; 102:657-78. [PMID: 818397 DOI: 10.1016/0022-2836(76)90340-5] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
32
|
Schiff C, Fougereau M. Determination of the primary structure of a mouse IgG2a immunoglobulin. Amino-acid sequence of the light chain. EUROPEAN JOURNAL OF BIOCHEMISTRY 1975; 59:525-37. [PMID: 812696 DOI: 10.1111/j.1432-1033.1975.tb02479.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The amino acid sequence of the light chain of the mouse monoclonal MOPC 173 immunoglobulin molecule (IgG2a,chi) is presented. This kappa chain contains 214 residues. Comparisons of this sequence with murine kappa chains already published by other workers bring a confirmation of the large size of the murine V chi chain pool. A complete identity was found with the constant region of the light chain of MOPC 21 from residue 97 to residue 214.
Collapse
|
33
|
Moulin A, Eskinazi D, de Preval C, Fougereau M. Chemical typing of human immunoglobulin VH subgroups. IMMUNOCHEMISTRY 1975; 12:883-92. [PMID: 815166 DOI: 10.1016/0019-2791(75)90246-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
34
|
McDonald JK, Ellis S. On the substrate specificity of cathepsins B1 and B2 including a new fluorogenic substrate for cathepsin B1. Life Sci 1975; 17:1269-76. [PMID: 577 DOI: 10.1016/0024-3205(75)90137-x] [Citation(s) in RCA: 146] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
35
|
Dickinson HR, Bush CA. Circular dichroism of oligosaccharides containing neuraminic acid. Biochemistry 1975; 14:2299-304. [PMID: 1138861 DOI: 10.1021/bi00682a004] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
In order to test the usefulness of circular dichroism in stereochemical and structural studies of oligosaccharides of glycoproteins, we measured the circular dichroism (CD) for N-acetylneuraminic acid (NAcNA) and several derivates. By acidic mathanolysis, we have prepared the deacetylated methyl ester, methyl glycoside of NAcNA, as well as a saponified product. Circular dichroism of these compounds allows us to assign the transition due to the amide chromophore. There is a carboxyl n-pi transition at about 220 nm which has a negative CD band associated with it for the beta-methocyneuraminic acid, but changes sign for the methyl ester (methyl (methyl beta-D-neuraminid)ate). We isolated the trisaccharides N-acetylneuraminyl-(2 leads to 3)-beta-D-galactopyranosyl-(1 leads to 4)-D-glucopyranose [(2leads to 3)NAcN-Lac] as well as (2 leads to 6)NAcN-Lac by paper chromatography and compared the CD for each. The two isomers show similar but distinguishable CD patterns, with a weak negative band due to the carboxyl group centered at 225 nm and a stronger positive band at 200 nm containing contributions from both the amide and carboxyl groups.
Collapse
|
36
|
Bonora GM, Toniolo C. Conformational properties of methionine homo-oligopeptides in solution. Biopolymers 1974; 13:2179-90. [PMID: 4429776 DOI: 10.1002/bip.1974.360131103] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
|
37
|
Bonora GM, Toniolo C. Sequential oligopeptides. Synthesis and characterization of the oligopeptides and a polypeptide with the repeating sequence L-norvalyl-glycyl-L-proline. Biopolymers 1974; 13:1055-65. [PMID: 4854247 DOI: 10.1002/bip.1974.360130518] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|
38
|
|
39
|
Bonora GM, Toniolo C, Fontana A, Di Bello C, Scoffone E. Alpha-glutamyl oligopeptides: preparation by the solid-phase method. Biopolymers 1974; 13:157-67. [PMID: 4818124 DOI: 10.1002/bip.1974.360130110] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|
40
|
Kuboki Y, Tanzer ML, Mechanic GL. Isolation of polypeptides containing the intermolecular cross-link , '-dihydroxylysinonorleucine from dentin collagen. Arch Biochem Biophys 1973; 158:106-15. [PMID: 4354028 DOI: 10.1016/0003-9861(73)90602-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
|
41
|
Vine WH, Brueckner DA, Needleman P, Marshall GR. Synthesis, biological activity, and 19 F nuclear magnetic resonance spectra of angiotensin II analogs containing fluorine. Biochemistry 1973; 12:1630-7. [PMID: 4349406 DOI: 10.1021/bi00732a026] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
|
42
|
Capony JP, Rydèn L, Demaille J, Pechère JF. The primary structure of the major parvalbumin from hake muscle. Overlapping peptides obtained with chemical and enzymatic methods. The complete amino-acid sequence. EUROPEAN JOURNAL OF BIOCHEMISTRY 1973; 32:97-108. [PMID: 4569071 DOI: 10.1111/j.1432-1033.1973.tb02584.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
43
|
Tung JS, Knight CA. The coat protein subunits of potato virus X and white clover mosaic virus, a comparison of methods for determining their molecular weights and some in situ degradation products of potato virus X protein. Virology 1972; 49:214-23. [PMID: 5039023 DOI: 10.1016/s0042-6822(72)80023-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|
44
|
Benjamini E, Michaeli D, Young JD. Antigenic determinants of proteins of defined sequences. Curr Top Microbiol Immunol 1972; 58:85-134. [PMID: 4115104 DOI: 10.1007/978-3-642-65357-5_3] [Citation(s) in RCA: 42] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
45
|
Pink JR, McNally MP, Wang AC, Fudenberg HH. Association of variable and constant regions of immunoglobulin heavy chains. IMMUNOCHEMISTRY 1972; 9:84-8. [PMID: 5064936 DOI: 10.1016/0019-2791(72)90286-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|
46
|
Schechter B, Schechter I, Ramachandran J, Conway-Jacobs A, Sela M, Benjamini E, Shimizu M. Synthetic antigens with sequential and conformation-dependent determinants containing the same L-tyrosyl-L-alanyl-L-glutamyl sequence. EUROPEAN JOURNAL OF BIOCHEMISTRY 1971; 20:309-20. [PMID: 4103320 DOI: 10.1111/j.1432-1033.1971.tb01395.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
47
|
|
48
|
|
49
|
|
50
|
|