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- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2015.12
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- 1,086 - 1,095 (10page)
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The psychrophilic organism Colwellia psychrerythraea strain 34H produces extracellular polysaccharide substances to tolerate cold environments. Sedoheptulose 7- phosphate isomerase (GmhA) is essential for producing Dglycero- D-mannoheptose 7-phosphate, a key mediator in the lipopolysaccharide biosynthetic pathway. We determined the crystal structure of GmhA from C. psychrerythraea strain 34H (CpsGmhA, UniProtKB code: Q47VU0) at a resolution of 2.8 A. The tetrameric structure is similar to that of homologous GmhA structures. Interestingly, one of the catalytic residues, glutamate, which has been reported to be critical for the activity of other homologous GmhA enzymes, is replaced by a glutamine residue in the CpsGmhA protein. We also found differences in the conformations of several other catalytic residues. Extensive structural and sequence analyses reveal that CpsGmhA shows high similarity to Escherichia coli DnaA initiatorassociating protein A (DiaA). Therefore, the CpsGmhA structure reported here may provide insight into the structural and functional correlations between GmhA and DiaA among specific microorganisms.
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참고문헌 (40)
참고문헌 신청
Battye, T. G. / 2011 / iMOSFLM : a new graphical interface for diffractionimage processing with MOSFLM / Acta Crystallogr. Sect D: Biol. Crystallogr 67:271~281
Bazaka, K. / 2011 / Bacterial adhesion / Springer :213~226
Brooke, J. S. / 1996 / Biosynthesis of inner core lipopolysaccharide in enteric bacteria identification and characterization of a conserved phosphoheptose isomerase / J. Biol. Chem 271:3608~3614
Carillo, S. / 2015 / A unique capsular polysaccharide structure from the psychrophilic marine bacterium Colwellia psychrerythraea 34H that mimics antifreeze(glyco)proteins / J. Am. Chem. Soc 137:179~189
Castresana, J. / 2000 / Selection of conserved blocks from multiple alignments for their use in phylogenetic analysis / Mol. Biol. Evol 17:540~552
Bazaka, K. / 2011 / Bacterial adhesion / Springer :213~226
Brooke, J. S. / 1996 / Biosynthesis of inner core lipopolysaccharide in enteric bacteria identification and characterization of a conserved phosphoheptose isomerase / J. Biol. Chem 271:3608~3614
Carillo, S. / 2015 / A unique capsular polysaccharide structure from the psychrophilic marine bacterium Colwellia psychrerythraea 34H that mimics antifreeze(glyco)proteins / J. Am. Chem. Soc 137:179~189
Castresana, J. / 2000 / Selection of conserved blocks from multiple alignments for their use in phylogenetic analysis / Mol. Biol. Evol 17:540~552
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