Organizational Unit:
School of Biological Sciences

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1986 - 1989 45
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End date: 1989 × Start date: 1986 × Has files: Yes ×

Publication Search Results

Now showing 1 - 10 of 45
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Analysis of in situ methylated microbial fatty acids by pyrolysis gas chromatography - mass spectrometry

1989-08 , Bourne, Thomas Franklin

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An investigation of inherently curved DNA in the upstream activator sequence (UAS) of E coli rrnB P1 promoter

1989-08 , Yang, Jin

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Genetic, serological, and biochemical analysis of surface antigen mutants of the nematode Caenorhabditis elegans that express hidden antigens

1989-05 , O'Brien, Peter Joseph

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Evaluation of caenorhabditis elegans as an acute lethality and a neurotoxicity screening model

1988-12 , Williams, Phillip Lindly

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Anaerobic biodegradation of phthalic acid esters

1989-08 , Painter, Susan Elizabeth

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Biochemical and molecular characterization of urease-positive campylobacters (campylobacter pylori and campylobacter mustelae

1989-08 , Okwumabua, Ogi Emeke

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NIH-small instrumentation program

1989 , Tornabene, Thomas G.

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Phenotypic and genotypic characterization of several unidentified new strains of campylobacter-like bacteria

1989-08 , Runsick, Cara Denise

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Gibberellic acid and reflected light mediated changes in the content of light - harvesting chlorophyll protein (LHC - II)

1989-08 , Bradburne, James Andrew

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DNA conformational change in Gal repressor-operator complex: involvement of central G-C base pair(s) of dyad symmetry

1988-12-23 , Wartell, Roger M. , Adhya, Sankar Lal

Gal repressor dimer binds to two gal operator sites, O[subscript E] and O[subscript I], which are 16 bp long similar sequences with hyphenated dyed symmetries (11,12). Repressor occupation hinders the reactivity of the N7 atoms in the major groups of guanines, located at positions 1,3 and 8, and the rotational 1′, 3 and 8′ of the symmetries. We have shown that Gal repressor binding to O[subscript E] or O[subscript I] DNA fragments increases the circular dichroism (CD) spectral peak in the 270 to 300 nm range. The CD change is similar to that observed for Lac repressor binding to its operator site (14). It is consistent with a DNA conformational change during complex formation between Gal repressor and O[subscript E] and O[subscript I] DNA. The CD spectral change was not observed when the central 8,8′ C-C base pairs in the DNA-protein complex were replaced by A-T base pairs, whereas substitution of the 1,1′ G-C base pairs do show the accompanying increase in the spectra during repressor binding. The absence of CD change of the Gal repressor complex with DNA mutated at the 8,8′ base pairs suggest that the central G-C base pairs are required for the repressor induced conformational change.

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