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Lourenço de Freitas N, Deberaldini MG, Gomes D, Pavan AR, Sousa Â, Dos Santos JL, Soares CP. Histone Deacetylase Inhibitors as Therapeutic Interventions on Cervical Cancer Induced by Human Papillomavirus. Front Cell Dev Biol 2021; 8:592868. [PMID: 33634093 PMCID: PMC7901962 DOI: 10.3389/fcell.2020.592868] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Accepted: 12/15/2020] [Indexed: 12/11/2022] Open
Abstract
The role of epigenetic modifications on the carcinogenesis process has received a lot of attention in the last years. Among those, histone acetylation is a process regulated by histone deacetylases (HDAC) and histone acetyltransferases (HAT), and it plays an important role in epigenetic regulation, allowing the control of the gene expression. HDAC inhibitors (HDACi) induce cancer cell cycle arrest, differentiation, and cell death and reduce angiogenesis and other cellular events. Human papillomaviruses (HPVs) are small, non-enveloped double-stranded DNA viruses. They are major human carcinogens, being intricately linked to the development of cancer in 4.5% of the patients diagnosed with cancer worldwide. Long-term infection of high-risk (HR) HPV types, mainly HPV16 and HPV18, is one of the major risk factors responsible for promoting cervical cancer development. In vitro and in vivo assays have demonstrated that HDACi could be a promising therapy to HPV-related cervical cancer. Regardless of some controversial studies, the therapy with HDACi could target several cellular targets which HR-HPV oncoproteins could be able to deregulate. This review article describes the role of HDACi as a possible intervention in cervical cancer treatment induced by HPV, highlighting the main advances reached in the last years and providing insights for further investigations regarding those agents against cervical cancer.
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Affiliation(s)
- Natália Lourenço de Freitas
- Department of Clinical Analysis, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara, Brazil
| | - Maria Gabriela Deberaldini
- Drugs and Medicines Department, School of Pharmaceutical Science, São Paulo State University (UNESP), Araraquara, Brazil
- Institute of Chemistry, São Paulo State University (UNESP), Araraquara, Brazil
| | - Diana Gomes
- CICS-UBI – Health Science Research Centre, University of Beira Interior, Covilhã, Portugal
| | - Aline Renata Pavan
- Drugs and Medicines Department, School of Pharmaceutical Science, São Paulo State University (UNESP), Araraquara, Brazil
- Institute of Chemistry, São Paulo State University (UNESP), Araraquara, Brazil
| | - Ângela Sousa
- CICS-UBI – Health Science Research Centre, University of Beira Interior, Covilhã, Portugal
| | - Jean Leandro Dos Santos
- Drugs and Medicines Department, School of Pharmaceutical Science, São Paulo State University (UNESP), Araraquara, Brazil
| | - Christiane P. Soares
- Department of Clinical Analysis, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara, Brazil
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Schwenke KD. Fraktionierung, Struktur und mögliche biologische Funktion der Histone. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/zfch.19670070303] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Abstract
1. Ribosomal protein fractions from rabbit reticulocytes and rat liver were prepared by extracting ribosomes with 0.2n-hydrochloric acid or guanidinium chloride and subsequent dialysis. 2. Treatment for 2.5hr. or less with 0.2n-hydrochloric acid dissolved 46-54% of the proteins, which were richer in arginine and lysine and in N-terminal alanine groups and poorer in aspartic acid and glutamic acid and in N-terminal glycine groups than the acid-insoluble proteins. 3. Protein fractions prepared from the guanidinium chloride extract of ribosomes from rat liver were usually more basic than those from rabbit reticulocytes. 4. The ratios lysine: arginine of fractions in the guanidinium chloride extracts were appreciably higher for proteins from rabbit reticulocytes than from rat liver. 5. The concentration of urea and the pH of the gel affected the rate of migration and number of bands in starch-gel electrophoresis.
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Affiliation(s)
- P Cohn
- Chester Beatty Research Institute, Institute of Cancer Research: Royal Cancer Hospital, Fulham Road, London, S.W. 3
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CASPARY EA, FIELD EJ. AN ENCEPHALITOGENIC PROTEIN OF HUMAN ORIGIN; SOME CHEMICAL AND BIOLOGICAL PROPERTIES*. Ann N Y Acad Sci 2006; 122:182-98. [PMID: 14313478 DOI: 10.1111/j.1749-6632.1965.tb20202.x] [Citation(s) in RCA: 100] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Boyland E, Sims P. Metabolism of polycyclic compounds. 16. The metabolism of 1:2-dihydronaphthalene and 1:2-epoxy-1:2:3:4-tetrahydronaphthalene. Biochem J 2006; 77:175-81. [PMID: 16748839 PMCID: PMC1204914 DOI: 10.1042/bj0770175] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- E Boyland
- Chester Beatty Research Institute, Institute of Cancer Research: Royal Cancer Hospital, London, S.W. 3
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Laurence DJ, Simson P, Butler JA. Studies on histones. 5. The histones of the Crocker sarcoma and spontaneous mammary tumours of mice. Biochem J 2006; 87:200-5. [PMID: 16748996 PMCID: PMC1276861 DOI: 10.1042/bj0870200] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- D J Laurence
- Chester Beatty Research Institute, Institute of Cancer Research: Royal Cancer Hospital, Fulham Road, London, S.W. 3
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McIlwain H. Protein interactions and metabolic response to stimulating agents in isolated cerebral tissues: histones as inhibitors. Biochem J 2006; 73:514-21. [PMID: 16748807 PMCID: PMC1197089 DOI: 10.1042/bj0730514] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- H McIlwain
- Department of Biochemistry, Institute of Psychiatry (British Postgraduate Medical Federation, University of London) Maudsley Hospital, London, S.E. 5
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Booth J, Boyland E, Sato T, Sims P. Metabolism of polycyclic compounds. 17. The reaction of 1:2-dihydronaphthalene and 1:2-epoxy-1:2:3:4-tetrahydronaphthalene with glutathione catalysed by tissue preparations. Biochem J 2006; 77:182-6. [PMID: 16748840 PMCID: PMC1204915 DOI: 10.1042/bj0770182] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- J Booth
- Chester Beatty Research Institute, Institute of of Cancer Research: Royal Cancer Hospital, London, S.W. 3
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Boyland E, Ramsay GS, Sims P. Metabolism of polycyclic compounds. 18. The secretion of metabolites of naphthalene, 1:2-dihydronaphthalene and 1:2-epoxy-1:2:3:4-tetrahydronaphthalene in rat bile. Biochem J 2006; 78:376-84. [PMID: 16748878 PMCID: PMC1205278 DOI: 10.1042/bj0780376] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- E Boyland
- Chester Beatty Research Institute, Institute of Cancer Research: Royal Cancer Hospital, London, S.W. 3
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BOOTH J, BOYLAND E, SIMS P. Metabolism of polycyclic compounds. 15. The conversion of naphthalene into a derivative of glutathione by rat-liver slices. Biochem J 1998; 74:117-22. [PMID: 13802685 PMCID: PMC1204057 DOI: 10.1042/bj0740117] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Abstract
The histone extracted from calf thymus glands is a complex system of proteins, which can be fractionated by chromatography on carboxymethyl cellulose columns into three principal fractions (1) very lysine-rich, (2) moderately lysine-rich, (3) arginine-rich. When examined by starch gel chromatography each of these gives more than one band. Methods have been devised for further separation of the components in some cases. The components show characteristic differences in end groups and certain amino acids as well as in their basic character. Histones extracted from various rat tissues can be separated into similar fractions, of which the amino acid analyses are similar to those derived from calf thymus, within the experimental error. To this extent, no species or tissue specificity of the fractionated histones was observed. Although all the histone fractions contain approximately one basic amino acid to three non-basic amino acids their structure is not regular, as Phillips has shown that in certain fractions the number of non-basic groups between two basic groups may vary from 0 to seven or more. The possible functions of histones are discussed.
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PHILLIPS DM, SIMSON P. Identification of some peptides from an arginine-rich histone and their bearing on the structure of deoxyribonucleohistone. Biochem J 1998; 82:236-41. [PMID: 14486231 PMCID: PMC1243442 DOI: 10.1042/bj0820236] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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PHILLIPS DM, JOHNS EW. A study of the proteinase content and the chromatography of thymus histones. Biochem J 1998; 72:538-44. [PMID: 14432611 PMCID: PMC1196967 DOI: 10.1042/bj0720538] [Citation(s) in RCA: 101] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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BOYLAND E, SIMS P. Metabolism of polycyclic compounds. 20. The metabolism of phenanthrene in rabbits and rats: mercapturic acids and related compounds. Biochem J 1998; 84:564-70. [PMID: 13872197 PMCID: PMC1243715 DOI: 10.1042/bj0840564] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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JOHNS EW, PHILLIPS DM, SIMSON P, BUTLER JA. Improved fractionations of arginine-rich histones from calf thymus. Biochem J 1998; 77:631-6. [PMID: 13790220 PMCID: PMC1205086 DOI: 10.1042/bj0770631] [Citation(s) in RCA: 148] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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21
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Abstract
1. The calf-thymus histone group F2a has been separated into two subfractions by stepwise precipitation with acetone from acid solution. 2. Carboxymethyl-cellulose and dextran-gel column chromatography and a method involving dialysis against ethanol have also given the subfractions, but the acetone-hydrochloric acid method has proved to be the most practicable. 3. The two subfractions differ significantly in their amino acid composition and in the pattern of peptides obtained by tryptic digestion. Both fractions have a very low content of N-terminal amino acids and contain acetyl groups.
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HNILICA LS, BILLEN D. THE EFFECT OF DNA-HISTONE INTERACTIONS ON THE BIOSYNTHESIS OF DNA IN VITRO. ACTA ACUST UNITED AC 1996; 91:271-80. [PMID: 14240645 DOI: 10.1016/0926-6550(64)90251-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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23
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Abstract
1. The relative amounts of incorporation in vivo of l-lysine, and in one experiment l-arginine, into different histone fractions from Krebs ascites and a lymphoma ascites cells of mice and a ;solid' tumour and liver of rats have been determined. 2. No marked differences in the incorporations of the amino acids into the fractions F1, F2a, F2b and F3 from the tumours were generally observed, although in some experiments there was a greater incorporation into fraction F2b, which could be decreased by further purification. 3. In the tumours the incorporations into all cell protein fractions obtained were approximately the same, indicating that the amount of incorporation was that required for the increase of cell mass. 4. In rat liver, the incorporations into fractions F1, F2a and F3 were not greatly different. That into fraction F2b was variable. The incorporation into the histone fractions was much less than that into the acid-insoluble nuclear residue, indicating that considerable turnover of amino acids in the latter occurs. 5. The decrease in radioactivity of labelled histone and acid-insoluble nuclear protein in vivo during several days confirmed the relatively small turnover of the histone fraction. The time taken for liver whole histone to lose half its radioactivity was about 1 week. A histone fraction of slower metabolism was also detected. 6. It is concluded that no appreciable turnover of protein occurs in any one histone fraction, the somewhat higher values obtained in certain cases being associated with acidic impurities. The apparently high rate of incorporation into histone of resting liver is discussed in relation to recent evidence on DNA metabolism of resting liver.
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Carter WG, Etzler ME. Isolation and characterization of cyanogen bromide fragments and a glycopeptide from the Dolichos biflorus lectin. Biochemistry 1975; 14:5118-22. [PMID: 1191631 DOI: 10.1021/bi00694a015] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The 110000 molecular weight Dolichos biflorus lectin is a glycoprotein composed of four subunits of approximately 27000 molecular weight with one methionine residue per subunit (Carter and Etzler, 1975b). Cyanogen bromide cleavage of the lectin yielded two fragments with approximate molecular weights of 15000 and 12000 as determined by electrophoresis on sodium dodecyl sulfate gels. Only the 15000 molecular weight fragment stained for carbohydrate with the periodic acid-Schiff stain. The two fragments were isolated, and their amino acid compositions were determined. The 15000 molecular weight fragment was identified as the amino terminal segment of the lectin subunits by NH2-terminal amino acid analysis. A glycopeptide with a minimum molecular weight of 1100 was isolated from the lectin by exhaustive Pronase digestion. Complete acid hydrolysis of the glycopeptide yielded aspartic acid, mannose, and N-acetylglucosamine in the ratio of 1:4-5:1-2. Partial acid hydrolysis of the glycopeptide produced a component which had an identical mobility with commercial N-acetylglucosaminylasparagine in high voltage paper electrophoresis. The data indicate that the carbohydrate unit of the lectin is bound to the amino terminal half of the subunits by a glycosylamine linkage between N-acetylglucosamine and asparagine.
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27
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Heincz MC, McFall E. N-terminal amino acid sequences of D-serine deaminases of wild-type and operator-constitutive strains of Escherichia coli K-12. J Bacteriol 1975; 123:1163-8. [PMID: 1099073 PMCID: PMC235842 DOI: 10.1128/jb.123.3.1163-1168.1975] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The N-terminal amino acid sequences of the D-serine deaminases from strains of Escherichia coli K-12 that harbor wild-type and high-level constitutive catabolite-insensitive operator-initiator regions are identical: Met-Ser-GluNH2-Ser-Gly-Arg-His-Cys. This result indicates that the operator-initiator region is probably distinct from the D-serine deaminase structural gene.
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Sautière P, Tyrou D, Laine B, Mizon J, Ruffin P, Biserte G. Covalent structure of calf-thymus ALK-histone. EUROPEAN JOURNAL OF BIOCHEMISTRY 1974; 41:563-76. [PMID: 4856314 DOI: 10.1111/j.1432-1033.1974.tb03298.x] [Citation(s) in RCA: 62] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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30
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Séparation des Dansylaminoacides par chromatographie bidirectionnelle sur papier à texture fine. 2ième partie: Associations de chromatographies de partage. Chromatographia 1972. [DOI: 10.1007/bf02268940] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Glatron MF, Lecadet MM, Dedonder R. Structure of the parasporal inclusion of Bacillus thuringiensis Berliner: characterization of a repetitive subunit. EUROPEAN JOURNAL OF BIOCHEMISTRY 1972; 30:330-8. [PMID: 4351438 DOI: 10.1111/j.1432-1033.1972.tb02102.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Rosmus J, Deyl Z. Chromatographic methods in the analysis of protein structure. The methods for identification of N-terminal amino acids in peptides and proteins. Part B. J Chromatogr A 1972; 70:221-339. [PMID: 4560137 DOI: 10.1016/s0021-9673(00)92700-6] [Citation(s) in RCA: 62] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Kumon A, Nishiyama K, Yamamura H, Nishizuka Y. Multiplicity of Adenosine 3′,5′-Monophosphate-dependent Protein Kinases from Rat Liver and Mode of Action of Nucleoside 3′,5′-Monophosphate. J Biol Chem 1972. [DOI: 10.1016/s0021-9258(19)45095-3] [Citation(s) in RCA: 114] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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34
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Séparation des dansylaminoacides par chromatographie bidirectionnelle sur papier à texture fine. 1ère partie — Associations de chromatographie de partage et de chromatographie de relargage. Chromatographia 1972. [DOI: 10.1007/bf02268651] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Lecadet MM, Chevrier G, Dedonder R. Analysis of a protein fraction in the spore coats of Bacillus thuringiensis. Comparison with crystal protein. EUROPEAN JOURNAL OF BIOCHEMISTRY 1972; 25:349-58. [PMID: 4625116 DOI: 10.1111/j.1432-1033.1972.tb01703.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Sirotnak FM, Salser JS. Dihydrofolate reductase from diplococcus pneumoniae. Purification, amino acid composition, and N-terminal amino acid analysis. Arch Biochem Biophys 1971; 145:268-75. [PMID: 4399355 DOI: 10.1016/0003-9861(71)90036-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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39
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Pagé M. Demonstration of the microheterogeneity of fetuin by electrofocusing. BIOCHIMICA ET BIOPHYSICA ACTA 1971; 236:571-7. [PMID: 5559963 DOI: 10.1016/0005-2795(71)90241-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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40
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Greenaway PJ, Murray K. Heterogeneity and polymorphism in chicken erythrocyte histone fraction V. NATURE: NEW BIOLOGY 1971; 229:233-8. [PMID: 5279795 DOI: 10.1038/newbio229233a0] [Citation(s) in RCA: 61] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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41
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Bizzini B, Blass J, Turpin A, Raynaud M. Chemical characterization of tetanus toxin and toxoid. Amino acid composition, number of SH and S-S groups and N-terminal amino acid. EUROPEAN JOURNAL OF BIOCHEMISTRY 1970; 17:100-5. [PMID: 5486573 DOI: 10.1111/j.1432-1033.1970.tb01141.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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42
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Desai LS, Foley GE. Homologies in amino acid composition and structure of histone F2al isolated from human leukaemic cells. Biochem J 1970; 119:165-70. [PMID: 4321268 PMCID: PMC1179338 DOI: 10.1042/bj1190165] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Histones F2al extracted from normal and neoplastic cells possess similar amino acid compositions. Tryptic and chymotryptic peptides of the F2al histones have identical chromato-electrophoretic R(F) values. It is concluded that histones F2al from various sources have similar overall structures. The observed differences in the ratios of in-N-monomethyl- and di-in-N-methyl-lysine in the histones from normal and neoplastic cells may be of significance with respect to gene regulation.
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43
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Pagé M, Godin C. Alanine as the N-terminal amino acid of glutamate dehydrogenase. BIOCHIMICA ET BIOPHYSICA ACTA 1970; 200:598-600. [PMID: 5461760 DOI: 10.1016/0005-2795(70)90124-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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44
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Johns EW, Diggle JH. A method for the large scale preparation of the avian erythrocyte specific histone F2C. EUROPEAN JOURNAL OF BIOCHEMISTRY 1969; 11:495-8. [PMID: 4312785 DOI: 10.1111/j.1432-1033.1969.tb00800.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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45
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Nauciel C, Blass J, Mangalo R, Raynaud M. Evidence for two molecular forms of streptococcal erythrogenic toxin. Conversion to a single form by 2-mercaptoethanol. EUROPEAN JOURNAL OF BIOCHEMISTRY 1969; 11:160-4. [PMID: 4982089 DOI: 10.1111/j.1432-1033.1969.tb00754.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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46
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Abstract
1. Urease of specific activity 160-180 Sumner units/g. (Sumner, 1951) was purified from jack-bean meal. The preparation was pure on the basis of polyacryl-amide-gel electrophoresis and N-terminal studies. 2. By using both the 1-fluoro-2,4-dinitrobenzene method and the phenyl isothiocyanate method a single N-terminal methionine residue was found. 3. A single C-terminal sequence -Tyr-Leu-Phe was found by studies with carboxypeptidase A, carboxypeptidase B and hydrazinolysis. 4. N-Bromosuccinimide cleavage showed that five unique tryptophan sequences were present: Trp-Ala, Trp-Glu, Trp-Gly, Trp-Met and Trp-Arg. 5. Polyacrylamide-gel electrophoresis in sodium dodecyl sulphate showed that urease had a subunit molecular weight of 76000. 6. The yield of N- and C-terminal amino acids, the number of tryptic peptides and tryptophan sequences and the above polyacrylamide-gel electrophoretic measurement all suggest that urease contains a single structural subunit of molecular weight 75000.
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Johns EW, Forrester S. Studies on nuclear proteins. The binding of extra acidic proteins to deoxyribonucleoprotein during the preparation of nuclear proteins. EUROPEAN JOURNAL OF BIOCHEMISTRY 1969; 8:547-51. [PMID: 5796141 DOI: 10.1111/j.1432-1033.1969.tb00561.x] [Citation(s) in RCA: 141] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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48
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DINITRO-PHENYL AMINOACIDS. CHROMATOGRAPHY 1969. [DOI: 10.1016/b978-0-433-30503-3.50013-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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49
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Abstract
1. Histones were examined from five human tissues, namely thymus, liver, placenta, bronchial tumour and peripheral leucocytes. 2. The four main histone fractions [F1, F2(b), F2(a), and F3] were isolated and characterized. 3. The amino acid analyses, N-terminal group analyses and electrophoretic patterns were very similar to those of the corresponding fractions of calf thymus. 4. The yields of fractions F1 and F2(b) were high in human thymus, in human bronchial tumour and in some preparations of normal human leucocytes. 5. It is concluded that the pattern of nuclear histones found in lower forms of life was conserved during the evolutionary process leading to man.
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Sautiere P, Starbuck WC, Roth C, Busch H. Structural Analysis of the Glycine-rich, Arginine-rich Histone. J Biol Chem 1968. [DOI: 10.1016/s0021-9258(18)94505-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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