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  • 1
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    Crystal structure of human BPI and two bound phospholipids at 2.4 angstrom resolution (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-06-20
    Description: Bactericidal/permeability-increasing protein (BPI), a potent antimicrobial protein of 456 residues, binds to and neutralizes lipopolysaccharides from the outer membrane of Gram-negative bacteria. At a resolution of 2.4 angstroms, the crystal structure of human BPI shows a boomerang-shaped molecule formed by two similar domains. Two apolar pockets on the concave surface of the boomerang each bind a molecule of phosphatidylcholine, primarily by interacting with their acyl chains; this suggests that the pockets may also bind the acyl chains of lipopolysaccharide. As a model for the related plasma lipid transfer proteins, BPI illuminates a mechanism of lipid transfer for this protein family.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Beamer, L J -- Carroll, S F -- Eisenberg, D -- GM31299/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1997 Jun 20;276(5320):1861-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉UCLA-DOE Laboratory of Structural Biology and Molecular Medicine, Molecular Biology Institute, University of California, Los Angeles, CA 90095, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9188532" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Antimicrobial Cationic Peptides ; Binding Sites ; Blood Bactericidal Activity ; Blood Proteins/*chemistry/metabolism ; Crystallization ; Crystallography, X-Ray ; Humans ; Lipopolysaccharides/metabolism ; *Membrane Proteins ; Models, Molecular ; Molecular Sequence Data ; Phosphatidylcholines/chemistry/*metabolism ; *Protein Conformation ; Protein Structure, Secondary ; Protein Structure, Tertiary
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Conserved residues make similar contacts in two repressor-operator complexes (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1990-03-09
    Description: Comparison of a lambda repressor-operator complex and a 434 repressor-operator complex reveals that three conserved residues in the helix-turn-helix (HTH) region make similar contacts in each of the crystallographically determined structures. These conserved residues and their interactions with phosphodiester oxygens help establish a frame of reference within which other HTH residues make contacts that are critical for site-specific recognition. Such "positioning contacts" may be important conserved features within families of HTH proteins. In contrast, the structural comparisons appear to rule out any simple "recognition code" at the level of detailed side chain-base pair interactions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pabo, C O -- Aggarwal, A K -- Jordan, S R -- Beamer, L J -- Obeysekare, U R -- Harrison, S C -- GM 29109/GM/NIGMS NIH HHS/ -- GM 31471/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1990 Mar 9;247(4947):1210-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Department of Molecular Biology and Genetics, Johns Hopkins University School of Medicine, Baltimore, MD 21205.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2315694" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Asparagine ; Base Composition ; Base Sequence ; Binding Sites ; *DNA-Binding Proteins ; Glutamine ; Hydrogen Bonding ; Molecular Sequence Data ; Molecular Structure ; *Operator Regions, Genetic ; Protein Conformation ; Repressor Proteins/*metabolism ; Transcription Factors/*metabolism ; Viral Proteins ; Viral Regulatory and Accessory Proteins
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    The DNA binding arm of lambda repressor: critical contacts from a flexible region (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-10-11
    Description: Segments of protein that do not adopt a well-ordered conformation in the absence of DNA can still contribute to site-specific recognition of DNA. The first six residues (NH2-Ser1-Thr2-Lys3-Lys4-Lys5-Pro6-) of phage lambda repressor are flexible but are important for site-specific binding. Low-temperature x-ray crystallography and codondirected saturation mutagenesis were used to study the role of this segment. All of the functional sequences have the form [X]1-[X]2-[Lys or Arg]3-[Lys]4-[Lys or Arg]5-[X]6. A high-resolution (1.8 angstrom) crystal structure shows that Lys3 and Lys4 each make multiple hydrogen bonds with guanines and that Lys5 interacts with the phosphate backbone. The symmetry of the complex breaks down near the center of the site, and these results suggest a revision in the traditional alignment of the six lambda operator sites.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Clarke, N D -- Beamer, L J -- Goldberg, H R -- Berkower, C -- Pabo, C O -- GM31471/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1991 Oct 11;254(5029):267-70.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology and Genetics, Johns Hopkins University School of Medicine, Baltimore, MD 21205.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1833818" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Bacteriophage lambda/genetics ; DNA, Viral/*chemistry ; *DNA-Binding Proteins ; Genetic Variation ; Molecular Sequence Data ; *Nucleic Acid Conformation ; Repressor Proteins/*chemistry ; Viral Proteins ; Viral Regulatory and Accessory Proteins/*chemistry ; X-Ray Diffraction
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    Structural basis of diverse substrate recognition by PMM/PGM fromP. aeruginosa (2004)
    International Union of Crystallography
    Details
    Publication Date: 2004-08-26
    Print ISSN: 0108-7673
    Electronic ISSN: 2053-2733
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Published by International Union of Crystallography
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  • 5
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    Crystal structure of BPI, the human bactericidal/permeability-increasing protein (1996)
    International Union of Crystallography
    Details
    Publication Date: 1996-08-08
    Print ISSN: 0108-7673
    Electronic ISSN: 2053-2733
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Published by International Union of Crystallography
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