A: HTH-type transcriptional regulator CueR B: HTH-type transcriptional regulator CueR X: COPA PROMOTER DNA NON-TEMPLATE STRAND Y: COPA PROMOTER DNA TEMPLATE STRAND U: COPA PROMOTER DNA TEMPLATE STRAND (ALTERNATE CONFORMATION) V: COPA PROMOTER DNA NON-TEMPLATE STRAND (ALTERNATE CONFORMATION)
The crystallized DNA contains a pseudo-palyndromic region and has the following sequence: 5'- ...The crystallized DNA contains a pseudo-palyndromic region and has the following sequence: 5'- TGACCTTCCCCTTGCTGGAAGGTTTA -3', 3'- ACTGGAAGGGGAACGACCTTCCAAAT -5'. The two conformation A and B result from the alternate DNA conformations observed in the crystals. The pseudo-palyndrome sequence is ACCTTCC:GGAAGGT. Two orientations of the DNA were observed in the crystal. Chain X and Y in conformer A represent the the original sequences of the pseudo-palyndrome. Chain U and V in conformer B represent the alternate DNA conformation. We showed this to be the fact by using Bromine-subsituted bases in the top strand only. The results of which showed Br density peaks in both strands, leading to the alternate conformation of several bases. The refinements were performed, with Phenix, with both alternates present. the pseudo-palindrome in the sequence is: 5'-nnACCTTCCnnnnnnnGGAAGGTnnn-3', 3'-nnTGGAAGGnnnnnnnCCTTCCAnnn-5'. The Bromine peaks (seen on both strands, even though only the top strand, chain X, had Bromines) guided us on how to build the alternate chain which is: U: 5'-AAACCTTCCAGCAAGGGGAAGGTCA-3', V: 3'-TTTGGAAGGTCGTTCCCCTTCCAGT-5'.
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実験情報
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実験
実験
手法: X線回折 / 使用した結晶の数: 1
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試料調製
結晶
マシュー密度: 2.41 Å3/Da / 溶媒含有率: 49.02 %
結晶化
温度: 295 K / 手法: 蒸気拡散法, ハンギングドロップ法 / pH: 7.5 詳細: 0.2M HEPES, PH 7.5, 0.1M CACL2 AND 16% PEG4000, VAPOR DIFFUSION, HANGING DROP TEMPERATURE 295K PH範囲: 7.5