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1  autorepressor in the presence or absence of octopine.
2 angle DNA bend in the presence or absence of octopine.
3 tter mutations interfered with activation by octopine.
4 occQ promoter in the presence and absence of octopine.
5 activate the occQ promoter in the absence of octopine.
6 at is transcriptionally induced by the opine octopine.
7 e Ti plasmid and to be directly inducible by octopine.
8 nes that direct the uptake and catabolism of octopine.
9  a tumor-released arginine derivative called octopine.
10 ron required for the catabolism of the opine octopine.
11 dependent upon induction of the tra genes by octopine.
12                                              Octopine, a charged molecule derived from arginine and p
13 ntrol of the occ genes occurs in response to octopine, a metabolite released from plant tumors.
14 ntrol of the occ genes occurs in response to octopine, a nutrient released from crown gall tumors.
15  occQ and occR in the presence or absence of octopine, although octopine triggers a conformational ch
16 lasmids is stimulated by OccR in response to octopine, an opine released from crown gall tumours, and
17 ted that this arginase gene is essential for octopine and arginine catabolism.
18 tly inducible by proline, while induction by octopine and by arginine (and probably by ornithine) req
19 d in differences in host specificity between octopine and nopaline strains of Agrobacterium, with the
20 A microarrays, representing all genes of the octopine- and nopaline-type Ti plasmids, to identify all
21 rnithine and a third group could not utilize octopine, arginine, ornithine, or proline as a carbon so
22           One group of mutants could not use octopine as a carbon source, while a second group of mut
23 ed all the genes required for utilization of octopine as a source of carbon, nitrogen, and energy.
24                         Similarly, exogenous octopine binds to OccR, resulting in OoxR/octopine compl
25 vated promoter lies just downstream from the octopine catabolic genes, and transcribes six genes in a
26 11 other opines were tested for induction of octopine catabolic operon and all were able to do so.
27 um tumefaciens that positively regulates the octopine catabolism operon of the Ti plasmid and is also
28 um tumefaciens that positively regulates the octopine catabolism operon of the Ti plasmid.
29                                              Octopine causes DNA-bound OccR to undergo a conformation
30                                              Octopine causes prebound OccR to undergo a conformationa
31                                    The opine octopine causes synthesis of the quorum-sensing TraR pro
32 us octopine binds to OccR, resulting in OoxR/octopine complexes that bind to the promoter of the octo
33 racteristic of transcriptionally active OccR-octopine complexes.
34 ulating the expression of traR via OccR, the octopine-dependent activator of the opine regulon.
35 t of these mutant proteins in the absence of octopine displayed DNA binding and bending properties ch
36  a high angle DNA bend blocked activation by octopine in vivo.
37 of OccR-DNA complexes and their responses to octopine in ways that we had predicted.
38                 Expression of trlR inhibited octopine-induced conjugation of pTi15955 and pTiR10 by s
39                                              Octopine induces conjugation of the octopine-mannityl op
40                             By screening for octopine-inducible gene expression, we previously identi
41 000 transcriptional fusions was screened for octopine-inducible patterns of gene expression.
42          Octopine induces conjugation of the octopine-mannityl opine-type Ti plasmids by regulating t
43 overed a second traR-like gene, trlR, on the octopine-mannityl opine-type Ti plasmids pTi15955 and pT
44                 The mocC gene encoded by the octopine/mannityl opine-type Ti plasmid pTi15955 is rela
45 contains the 14-kb BamHI fragment 4 from the octopine/mannityl opine-type Ti plasmid pTi15955, grew w
46 icient to cause constitutive activation, and octopine must cause at least one additional conformation
47 nducible by arginine, while it is induced by octopine only in strains that can convert octopine to ar
48 of which showed defects in the catabolism of octopine or its metabolites, were obtained.
49 e complexes that bind to the promoter of the octopine oxidase gene (oox) operon and activate the tran
50                                 They are (i) octopine oxidase, which converts octopine to arginine an
51                                              Octopine stimulates expression of the traR gene, whose p
52 s, material sheared from the cell surface of octopine strain A348 was seen to possess detectable leve
53 actors is VirF, an F-box protein produced by octopine strains of Agrobacterium, which presumably faci
54               We show that both nopaline and octopine strains produce abundant amounts of VirB1* and
55                                     Purified octopine synthase (Ocs, normally expressed in plant tumo
56 he superpromoter consists of a trimer of the octopine synthase transcriptional activating element aff
57 3 proteins encoded by three Ti plasmids, the octopine Ti plasmid pTiA6NC, the supervirulent plasmid p
58 irF, and virF-T-DNA intergenic regions of an octopine Ti plasmid.
59 hey are (i) octopine oxidase, which converts octopine to arginine and pyruvate and is encoded by the
60 by octopine only in strains that can convert octopine to arginine.
61 ied all steps required for the catabolism of octopine to glutamate.
62 he presence or absence of octopine, although octopine triggers a conformational change that shortens
63                           The vir regions of octopine-type and nopaline-type Ti plasmids direct the t
64 sogenic A. tumefaciens strains containing an octopine-type or nopaline-type Ti plasmid.
65 ocus, which was previously identified on the octopine-type Ti plasmid but thought to be absent from t
66 robacterium tumefaciens strains harboring an octopine-type Ti plasmid exhibit a similar activity whic
67  -F, -G, -H, and -I of the trb region of the octopine-type Ti plasmid pTi15955 and of the tra2 core r
68 ted to the repA, repB, and repC genes of the octopine-type Ti plasmid pTiB6S3 as well as to other rep
69                In the region upstream of the octopine-type Ti plasmid repABC operon, three promoters
70 ow that TraR increases the copy number of an octopine-type Ti plasmid up to eightfold and that TraR a
71 within the repB-repC intergenic region of an octopine-type Ti plasmid.
72 ourth gene (repD) in the repABC operon of an octopine-type Ti plasmid.
73 of Agrobacterium tumefaciens wide-host-range octopine-type Ti plasmids is regulated by the LuxR-type
74                        Expression of traR in octopine-type Ti plasmids is stimulated by OccR in respo
75                                              Octopine-type Ti plasmids of Agrobacterium tumefaciens r
76               Conjugation of wide-host-range octopine-type Ti plasmids requires a tumor-released argi
77                                              Octopine-type Ti plasmids such as pTi15955, pTiA6 and pT
78 y the ags gene located in the T(R) region of octopine-type Ti plasmids.
79 ere, we show that a protein with homology to octopine VirF is encoded by the Ti plasmid of the nopali
80 ings colonized by the bacteria also produced octopine, which was detected using a Pocc-gfp reporter s