Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0026918 (Mycobacterium)
 52,428 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

In this work new data are presented on the comparative quantitative amino acid analysis of allergens, isolated and purified from different bacteria. On the basis of a high content of basic amino acids, such as lysine, arginine and histidine, in Mycobacterium, Brucella and Francisella tularensis allergens, a suggestion is made to classify bacterial allergens with histone-like proteins.
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PMID:[Histone-like nature of bacterial allergens used in diagnosing delayed hypersensitivity reaction]. 314 3

A new non-phosphorylated lipoamino acid was extracted from Mycobacterium phlei, strain IST. It is particularly sensitive to alkaline hydrolysis, and contains a lysine residue joined to a 1,2-diglyceride via an ester linkage. The FAB-positive mass spectrum shows the presence of various molecular species of which the most abundant contains a palmitic and a tuberculostearic acid residue. An analogue of this lipid was synthesized, 1,2-dipalmitoyl 3-lysyl glycerol. Both its chromatographic behavior (TLC), and the decomposition pathways of the MH+ ions, studied by FAB MS and MIKE spectroscopy, were identical to the natural product.
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PMID:Isolation and structural characterization of a new non-phosphorylated lipoamino acid from Mycobacterium phlei. 324 May 62

Muramyl di- or tripeptide (MDP or MTP) hapten derivatives bearing various structures were synthesized, and the correlation of these structures with cross-reactivity with Mycobacterium bovis BCG and their applicability to enhance induction of syngeneic tumor immunity were investigated. The cross-reactivity of MDP or MTP haptens to BCG was examined by T-cell proliferation responses of lymph node cells from BCG-primed C3H/He mice in the stimulation with MDP- or MTP-coupled syngeneic cells. A haptenic MDP derivative (designated L4-MDP) stimulated proliferative responses appreciably. Derivatives in which alanine in the peptide portion of L4-MDP was replaced by methylalanine or valine failed to induce stimulation. However, the cross-reactivity with BCG was regained in the MTP derivative that was formed by adding lysine to dipeptide containing methylalanine or valine. Whether this cross-reactive pattern was correlated with enhanced induction of tumor immunity was further investigated. According to the established protocol for the augmented induction of tumor immunity, BCG-primed C3H/He mice were immunized with various haptenic MDP-coupled syngeneic X5563 tumor cells. Immunization with tumor cells conjugating BCG-cross-reactive haptens resulted in enhanced tumor immunity, whereas immunization with tumor cells coupling non-cross-reactive haptens failed to produce anti-X5563 tumor immunity. These results indicate that the peptide portion in these haptenic structures is critical in the generation of BCG cross-reactivity leading to enhanced tumor immunity.
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PMID:Cross-reactivity between haptenic muramyl di- or tripeptide derivatives and Mycobacterium bovis BCG: potential application for enhancing tumor immunity. 349 Oct 48

We synthesized an octapeptide, H-Asp-Gly-Gly-Ser-Glu-Ser-Glu-Gly-OH, and a hexadecapeptide, H-Asp-Gly-Gly-Ser-Glu-Ser-Glu-Gly-Lys-Asn-Gly-Ser-Gln-Met-Arg-Leu-OH, which corresponded to amino acids 61 to 68 and 61 to 76, respectively, of the amino acid sequence of a crystalline protein reported to be tuberculin active. Authenticity and purity of the synthesized peptides were confirmed by high-pressure liquid chromatography, amino acid analysis, mass spectrometry, and protein sequencer analysis. Tuberculin activity of the synthesized peptides was examined in guinea pigs sensitized with Mycobacterium tuberculosis or Mycobacterium bovis BCG and in tuberculin-positive healthy humans. Neither the octa- nor the hexadecapeptide was as active as tuberculin skin-test antigen.
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PMID:Lack of tuberculin activity of synthetic peptides. 406 24

The acetone-soluble fraction extracted from lyophilized cells of Mycobacterium smegmatis ATCC 607 inhibited D4, a species-specific phage active against M. smegmatis. Evidence is presented indicating that the D4 inhibition was caused by the phage receptor substance(s) contained in this fraction. A fraction eluted from silicic acid with chloroform-methanol (95:5, v/v) showed the strongest inhibition of D4 phage. This fraction contained sugars and amino acids, and its infrared absorption spectrum was practically identical with those of the mycoside C isolated from the other species of mycobacteria. Further fractionation revealed that the active material was a mixture of several closely related peptidoglycolipids all of which showed, more or less, the phage inhibition. One of the compounds was purified and partially characterized; it contains three different amino acids, allo-threonine, alanine, and phenylalanine, at a molar ratio of 1:1:1, and also three different deoxyhexoses, probably 6-deoxytalose, 3,4-di-o-methylrhamnose, and 2,3,4-tri-o-methylrhamnose. A tentative name of "mycoside C(sm)" is proposed for this substance which possesses a slightly different structure from the known types of mycoside C and is probably specific for the species of M. smegmatis. A fraction extracted from the D4-resistant mutant of M. smegmatis ATCC 607 by acetone and then by chloroform-methanol (95:5, v/v) showed no phage inhibition and had no sugar component. In addition, this fraction contained lysine, serine, and a small amount of both glycine and an unidentified amino acid.
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PMID:Nature of the receptor substance of Mycobacterium smegmatis for D4 bacteriophage adsorption. 505 64

1. Lysine is readily incorporated into mycobactins P and S. Incorporation is into the hydroxamic acid moieties only and is equal in the mycobactic acid and cobactin portions of the molecule. 2. 2-Amino-6-hydroxyaminohexanoic acid is not taken up by cells of Mycobacterium phlei and is not detectable in extracts of cells actively synthesizing mycobactin. 3. The most abundant material derived from lysine that can be detected in such cell extracts is an N(6)-acyl-lysine. Cells grown in the presence of iron contain markedly less of this material than do those grown under conditions of iron deficiency. 4. When added to growing cultures of M. phlei the N(6)-acyl-lysine is readily incorporated into mycobactin. 5. The hydroxy acid of cobactin P is derivable from propionate.
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PMID:Early steps in the biosynthesis of mycobactins P and S. 547 18

A tuberculin-active glycopeptide containing eight different amino acids and glucose was isolated from the protoplasm of Mycobacterium tuberculosis. A molecular weight of 4,000 to 5,000 was established by Sephadex gel filtration; other analyses showed a peptide to carbohydrate ratio of 9:1. These observations suggest a tentative composition of 3 to 4 residues of glucose, 12 residues each of aspartic and glutamic acids, 3 residues each of lysine, glycine, and serine, and 1 residue each of arginine, threonine, and alanine.
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PMID:Purified protoplasmic peptides of mycobacteria: chemical composition of a tuberculin-active glycopeptide. 554 Oct 3

Palmitoyltuberactinamine N (Pal-Tua N) and di-beta-lysylcapreomycin IIA (di-beta-Lys-Cpm IIA), which are synthetic derivatives of the antituberculous agent tuberactinomycin (Tum) and capreomycin (Cpm) respectively, were tested for anti-bacterial activity. Pal-Tua N inhibited not only tuberactinomycin-resistant Mycobacterium smegmatis but also Escherichia coli, Corynebacterium diphtheriae, Staphylococcus aureus, Streptococcus pyogenes, although it has lost activity against Mycobacterium tuberculosis. Di-beta-Lys-Cpm IIA inhibited the growth of laboratory-derived Tum-resistant M. smegmatis and M. tuberculosis as well as Tum-resistant M. tuberculosis from patients with one exceptional case.
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PMID:Antibacterial activity of palmitoyltuberactinamine N and di-beta-lysylcapreomycin IIA. 619 15

The enzyme-linked immunosorbent assay (ELisa) was used to detect the presence of antibodies to muramyl dipeptide (MDP) in serum of patients with leprosy or tuberculosis. Using a conjugate of MDP-lysine to horse radish peroxidase, no such antibodies could be detected in sera of either patients or controls. Antibodies to a sonicate antigen of Mycobacterium tuberculosis were found in sera of all individuals tested and the binding of these antibodies to the M. tuberculosis antigen could not be inhibited by MDP. On the other hand, binding of MDP to anti-MDP antibodies, raised in rabbits, was largely inhibited by free MDP, slightly inhibited by M. tuberculosis antigen and was not inhibited by the patients' sera.
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PMID:Absence of antibodies to muramyl dipeptide in patients with tuberculosis or leprosy. 680 89

The octapeptide Asp-Gly-Gly-Ser-Glu-Ser-Glu-Gly and the hexadecapeptide Asp-Gly-Gly-Ser-Glu-Ser-Glu-Gly-Lys-Asn-Gly-Ser-Gln-Met-Arg-Leu, part of a tuberculin-active intracellular mycobacterial protein, were synthesized. The synthetic peptides were shown to possess tuberculin activity by their ability to elicit a delayed-type allergic reaction in skin tests on Mycobacterium tuberculosis-sensitized guinea pigs. Purified protein derivative, the complex mixture of proteins of unknown composition which are excreted into the culture medium by M. tuberculosis and which is in wide use as a tuberculin-active preparation, was shown to cross-react weakly in the radioimmunoassays with the synthetic octapeptide when the 125I-labeled octapeptide and an anti-octapeptide antiserum were used.
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PMID:Synthesis and biological assays of peptides from a tuberculin-active protein. 685 17


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