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81.
A 570-kb DNA Sequence of the Escherichia coli K-12 Genome Corresponding to the 28.0-40.1 min Region on the Linkage Map 总被引:1,自引:0,他引:1
Aiba Hiroji; Baba Tomoya; Hayashi Kouji; Inada Toshifumi; Isono Katumi; Itoh Takeshi; Kasai Hiroaki; Kashimoto Kaoru; Kimura Shigenobu; Kitakawa Madoka; Kitagawa Masanari; Makino Kozo; Miki Takeyoshi; Mizobuchi Kiyoshi; Mori Hirotada; Mori Tomoko; Motomura Kouji; Nakade Shinsuke; Nakamura Yoshikazu; Nashimoto Hiroko; Nishio Yoshitaka; Oshima Taku; Saito Noriko; Sampei Gen-ichi; Seki Yasushi; Sivasundaram Suharnan; Tagami Hideaki; Takeda Jun-ichi; Takemoto Keiko; Takeuchi Yasushi; Wada Chieko; Yamamoto Yoshihiro; Horiuchi Takashi 《DNA research》1996,3(6):363-377
The 569,750 base pair sequence corresponding to the 28.040.1min region on the genetic map of Escherichia coli K-12 (W3110)was determined. This region includes the replication terminusregion and contained at least 549 potential open reading frames.Among them, 160 (29%) were previously reported, 174 (32%) werehomologous to other known genes, 102 (18%) were identical orsimilar to hypothetical genes registered in databases, and theremaining 113 (21%) did not show a significant similarity toany other gene. Of interest was the finding of a large numberof genes and gene clusters in andnear the replication terminationregion which had been thought to be genetically silent. Thoseincludeda cluster of genes for fatty acid ß-oxidation,the third copy of the pot (spermidine/putrescine transport system)gene cluster, the second dpp (dipeptide transport system) operon,the second dsm (anaerobic dimethyl sulfoxide reductase) operon,a cluster of fim (fimbrial) genes anda DNA helicase-like genewith a high molecular weight. In addition, we found the dnaC-and dnaT-like genes in the cryptic prophage, Rac, anda numberof genes originated probably from plasmids. 相似文献
82.
83.
Mitsuhiro Tawada Yasuhiko Ito Chieko Hamada Kazuho Honda Masashi Mizuno Yasuhiro Suzuki Fumiko Sakata Takeshi Terabayashi Yoshihisa Matsukawa Shoichi Maruyama Enyu Imai Seiichi Matsuo Yoshifumi Takei 《PloS one》2016,11(4)
MethodsEighty-three peritoneal membrane samples taken at catheter removal were examined to identify pathological characteristics of chronic peritoneal deterioration, which promotes EPS in patients undergoing long-term PD treatment with low occurrence of peritonitis.ResultsAccording to univariable logistic regression analysis of the pathological findings, thickness of the peritoneal membrane (P = 0.045), new membrane formation score (P = 0.006), ratio of luminal diameter to vessel diameter (L/V ratio, P<0.001), presence of CD31-negative vessels (P = 0.021), fibrin deposition (P<0.001), and collagen volume fraction (P = 0.018) were associated with EPS development. In analyses of samples with and without EPS matched for PD treatment period, non-diabetes, and PD solution, univariable analysis identified L/V ratio (per 0.1 increase: odds ratio (OR) 0.44, P = 0.003) and fibrin deposition (OR 6.35, P = 0.027) as the factors associated with EPS. L/V ratio was lower in patients with fibrin exudation than in patients without fibrin exudation.ConclusionsThese findings suggest that damage to vascular endothelial cells, as represented by low L/V ratio, could be a predictive finding for the development of EPS, particularly in long-term PD patients unaffected by peritonitis. 相似文献
84.
Mieko Okamoto Chieko Sato Yuko Kohno Takeo Mori Takeo Iwama Akira Tonomura Yoshio Miki Joji Utsunomiya Yusuke Nakamura Ray White Michiko Miyaki 《Human genetics》1990,85(6):595-599
Summary Familial adenomatous polyposis (FAP), which includes familial polyposis coli (FPC) and the Gardner syndrome (GS), is a genetically determined premalignant disease of the colon inherited by a locus (APC) mapping within 5q15–q22. To elucidate the role of 5q loss in FAP tumorigenesis, we analysed 51 colorectal tumors and seven desmoids from 19 cases of FPC and five GS patients, as well as 15 sporadic colon cancers. RFLP analysis revealed a high incidence of allelic deletion in hereditary colon cancers as well as in sporadic colon cancers with a peak at the APC locus. APC loss resulted primarily from interstitial deletion or mitotic recombination. Combined tumor and pedigree analysis in a GS family revealed loss of normal 5q alleles in three tumors, including a desmoid tumor, which suggests the involvement of hemizygosity or homozygosity of the defective APC gene in colon carcinogenesis and, possibly, in extracolonic neoplasms associated with FAP. 相似文献
85.
Comparison of Media for the Isolation of Haemophilus species from Cases of Seasonal Conjunctivitis Associated with Severe Endemic Trachoma 总被引:4,自引:0,他引:4 下载免费PDF全文
David W. Vastine Chandler R. Dawson Isao Hoshiwara Chieko Yoneda Toufique Daghfous Mohammed Messadi 《Applied microbiology》1974,28(4):688-690
Media for isolation of Haemophilus sp. from the conjuctiva were compared in an oasis in southern Tunisia where severe trachoma and seasonal epidemic purulent conjunctivitis are common. Of 89 children tested, IsoVitaleX-supplemented chocolate agar yielded Haemophilus in 87%, plain chocolate agar in 75%, sheep blood agar with a stab of Staphylococcus epidermidis in 74%, and Fildes medium in 58%. Since other microbial pathogens are easily identified in the modified blood agar, it was the most useful single medium. 相似文献
86.
The lipase-catalyzed ring-opening polymerization of ε-caprolactone ( ε-CL) and its derivatives was revisited using seven commercial enzymes. Lipases from Pseudomonas fluorescens (AK) and porcine pancreatic lipase (PPL) gave the best results, in both reaction conversion and degree of polymerization. Dependency on temperature and added concentration of enzyme was investigated, and there was a linear correlation between M n and the conversion ratio. The reaction proceeded rather slowly and the residual activity of these enzymes after prolonged incubation in ε-CL was studied. There was a negative correlation between the conversion ratio in the polymerization reaction and the tolerance of the enzymes for the solvent (monomer). Accordingly, a mechanism involving enzymatic ring-opening and non-enzymatic (but catalytic) polymerization was proposed. 相似文献
87.
Unconjugated interferon‐stimulated gene 15 specifically interacts with the hepatitis C virus NS5A protein via domain I 下载免费PDF全文
Nanae Minami Takayuki Abe Lin Deng Chieko Matsui Takasuke Fukuhara Yoshiharu Matsuura Ikuo Shoji 《Microbiology and immunology》2017,61(7):287-292
88.
Akira K. Tanaka Chieko Sato Yoshiari Shibata Akio Kobayashi Kyohei Yamashita 《Bioscience, biotechnology, and biochemistry》2013,77(7):1311-1315
(±)-Sclerotinin A (Scl. A) showed the same promoting activity as natural (+)-Scl. A, which was isolated as a growth promoting substance of rice seedlings from Sclerotinia sclerotiorum along with sclerin. By the combined use of Scl. A and gibberellin, the synergistic effect on the growth of rice seedlings was noticed as in the case of sclerin. Correlation between the chemical structure and biological activity of Scl. A derivatives and analogs was discussed. 相似文献
89.
Naoki Nishizawa Taiji Asami Kimiko Nishibori Yoshihiro Takatsu Atsuko Suzuki Kazutaka Ushio Shin-ichi Matsumoto Yuji Shimizu Masashi Yamaguchi Masami Kusaka Hisanori Matsui Tetsuya Ohtaki Chieko Kitada 《Bioorganic & medicinal chemistry letters》2019,29(4):654-658
The kisspeptin (Kp, Kp-54, metastin)/KISS1R system plays crucial roles in regulating the secretion of gonadotropin-releasing hormone. Continuous administration of nonapeptide Kp analogs caused plasma testosterone depletion, whereas bolus administration caused strong plasma testosterone elevation in male rats. To develop a new class of small peptide drugs, we focused on stepwise N-terminal truncation of Kp analogs and discovered potent pentapeptide analogs. Benzoyl-Phe-azaGly-Leu-Arg(Me)-Trp-NH2 (16) exhibited high agonist activity for KISS1R and excellent metabolic stability in rat serum. A single injection of a 4-pyridyl analog (19) at the N-terminus of 16 into male Sprague Dawley rats caused a robust increase in plasma luteinizing hormone levels, but unlike continuous administration of nonapeptide Kp analogs, continuous administration of 19 maintained moderate testosterone levels in rats. These results indicated that small peptide drugs can be successfully developed for treating sex hormone deficiency. 相似文献
90.
Hashizume C Kuramitsu M Zhang X Kurosawa T Kamata M Aida Y 《Microbes and infection / Institut Pasteur》2007,9(4):490-497
Vpr, an accessory gene product of human immunodeficiency virus type 1 (HIV-1), affects both viral and cellular proliferation by mediating long terminal repeat activation, cell cycle arrest at the G2 phase, and apoptosis. We previously found that Vpr plays a novel role as a regulator of pre-mRNA splicing both in vivo and in vitro. However, the cellular target of Vpr, as well as the mechanism of cellular pre-mRNA splicing inhibition by Vpr, is unknown. Here, we show clearly that Vpr inhibits the splicing of cellular pre-mRNA, such as beta-globin pre-mRNA and immunoglobulin (Ig) M pre-mRNA and that the third alpha-helical domain and arginine-rich region are important its ability to inhibit splicing. Additionally, using mutants with specific substitutions in two domains of Vpr, we demonstrated that the interaction between Vpr and SAP145, an essential splicing factor, was indispensable for splicing inhibition. Finally, co-immunoprecipitation and in vitro competitive binding assays indicated that Vpr associates with SAP145 and interferes with SAP145-SAP49 complex formation. Thus, these results suggest that cellular expression of Vpr may block spliceosome assembly by interfering with the function of the SAP145-SAP49 complex in host cells. 相似文献