1LEI

The kB DNA sequence from the HLV-LTR functions as an allosteric regulator of HIV transcription

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.250 

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This is version 1.2 of the entry. See complete history. 


Literature

The kB DNA sequence from the HIV Long Terminal Repeat functions as an allosteric regulator of HIV transcription

Chen-Park, F.E., Huang, D.B., Noro, B., Thanos, D., Ghosh, G.

(2002) J Biol Chem 277: 24701-24708

  • DOI: 10.1074/jbc.M200007200
  • Primary Citation of Related Structures:  
    1LEI

  • PubMed Abstract: 

    • NF-kappaB is an inducible transcription factor involved in the immune response, inflammation, and viral transcription. To address how the two NF-kappaB and three Sp1 binding sites of the human immunodeficiency virus (HIV) long terminal repeat (LTR) control multiple activator assembly and transcription, we first observed and compared unique conformations between the crystallographic structure of the NF-kappaB p50 ...

    NF-kappaB is an inducible transcription factor involved in the immune response, inflammation, and viral transcription. To address how the two NF-kappaB and three Sp1 binding sites of the human immunodeficiency virus (HIV) long terminal repeat (LTR) control multiple activator assembly and transcription, we first observed and compared unique conformations between the crystallographic structure of the NF-kappaB p50.p65 heterodimer bound to the uPA-kappaB target site to that of the p50.p65.HIV-kappaB complex. Next, cooperativity between two NF-kappaB molecules bound to tandem HIV-kappaB sequences was measured as well as that of NF-kappaB and transcription factor Sp1 when bound to adjacent sites. The cooperativity of hybrid HIV-LTR enhancers was measured with the 3' kappaB site converted to uPA-kappaB or to interferon beta gene enhancer kappaB. The hybrids were defective in transcriptional activator assembly and less active transcriptionally. These functional differences correlate with observed conformational differences and demonstrate that distinct kappaB DNA sequences function as allosteric regulators in a gene-specific manner.

    Organizational Affiliation: 

    Department of Biology, University of California, San Diego, La Jolla, California 92093-0359, USA.



Macromolecules

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(by identity cutoff)  |  Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
NUCLEAR FACTOR NF-KAPPA-B P65 SUBUNIT A274Mus musculusMutation(s): 0 
Gene Names: Rela, Nfkb3
Find proteins for Q04207 (Mus musculus)
Explore Q04207 
Go to UniProtKB:  Q04207
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
NUCLEAR FACTOR NF-KAPPA-B P50 SUBUNIT B313Mus musculusMutation(s): 0 
Gene Names: Nfkb1
Find proteins for P25799 (Mus musculus)
Explore P25799 
Go to UniProtKB:  P25799
Protein Feature View
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  • Reference Sequence
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    • Entity ID: 1
    MoleculeChainsLengthOrganismImage
    5'-D(*CP*TP*CP*AP*GP*GP*GP*AP*AP*AP*GP*TP*AP*CP*AP*GP*A)-3'C17N/A
    • Find similar nucleic acids by:  Sequence   |   Structure
      • Entity ID: 2
      MoleculeChainsLengthOrganismImage
      5'-D(*TP*CP*TP*GP*5ITP*AP*CP*5ITP*5ITP*5ITP*CP*CP*CP*TP*GP*AP*G)-3'D17N/A
      Small Molecules
      External Ligand Annotations 
      IDBinding Affinity (Sequence Identity %)
      DNAKd :  0.800000011920929   nM  PDBBind
      Experimental Data & Validation

      Experimental Data

      • Method: X-RAY DIFFRACTION
      • Resolution: 2.70 Å
      • R-Value Free: 0.284 
      • R-Value Work: 0.250 
      • Space Group: C 2 2 2
      Unit Cell:
      Length ( Å )Angle ( ˚ )
      a = 137.131α = 90
      b = 179.697β = 90
      c = 97.068γ = 90
      Software Package:
      Software NamePurpose
      DENZOdata reduction
      SCALEPACKdata scaling
      AMoREphasing
      CNSrefinement

      Structure Validation

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      View more in-depth experimental data

      Entry History 

      Deposition Data

      Revision History  (Full details and data files)

      • Version 1.0: 2003-04-15
        Type: Initial release
      • Version 1.1: 2008-04-28
        Changes: Version format compliance
      • Version 1.2: 2011-07-13
        Changes: Version format compliance