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397d

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[[Image:397d.jpg|left|200px]]
 
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{{Structure
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==A 1.3 A RESOLUTION CRYSTAL STRUCTURE OF THE HIV-1 TRANS-ACTIVATION RESPONSE REGION RNA STEM REVEALS A METAL ION-DEPENDENT BULGE CONFORMATION==
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|PDB= 397d |SIZE=350|CAPTION= <scene name='initialview01'>397d</scene>, resolution 1.300&Aring;
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<StructureSection load='397d' size='340' side='right'caption='[[397d]], [[Resolution|resolution]] 1.30&Aring;' scene=''>
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|SITE=
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== Structural highlights ==
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|LIGAND= <scene name='pdbligand=CA:CALCIUM ION'>CA</scene>
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<table><tr><td colspan='2'>[[397d]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=397D OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=397D FirstGlance]. <br>
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|ACTIVITY=
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.3&#8491;</td></tr>
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|GENE=
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene></td></tr>
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}}
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=397d FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=397d OCA], [https://pdbe.org/397d PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=397d RCSB], [https://www.ebi.ac.uk/pdbsum/397d PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=397d ProSAT]</span></td></tr>
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</table>
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'''A 1.3 A RESOLUTION CRYSTAL STRUCTURE OF THE HIV-1 TRANS-ACTIVATION RESPONSE REGION RNA STEM REVEALS A METAL ION-DEPENDENT BULGE CONFORMATION'''
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__TOC__
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</StructureSection>
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[[Category: Large Structures]]
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==Overview==
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[[Category: Ippolito JA]]
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The crystal structure of an HIV-1 trans-activation response region (TAR) RNA fragment containing the binding site for the trans-activation protein Tat has been determined to 1.3-A resolution. In this crystal structure, the characteristic UCU bulge of TAR adopts a conformation that is stabilized by three divalent calcium ions and differs from those determined previously by solution NMR. One metal ion, crucial to the loop conformation, binds directly to three phosphates in the loop region. The structure emphasizes the influence of metal ion binding on RNA structure and, given the abundance of divalent metal ion in the cell, raises the question of whether metal ions play a role in the conformation of TAR RNA and the interaction of TAR with Tat and cyclin T in vivo.
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[[Category: Steitz TA]]
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==About this Structure==
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397D is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/ ]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=397D OCA].
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==Reference==
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A 1.3-A resolution crystal structure of the HIV-1 trans-activation response region RNA stem reveals a metal ion-dependent bulge conformation., Ippolito JA, Steitz TA, Proc Natl Acad Sci U S A. 1998 Aug 18;95(17):9819-24. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/9707559 9707559]
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[[Category: Protein complex]]
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[[Category: Ippolito, J A.]]
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[[Category: Steitz, T A.]]
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[[Category: CA]]
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[[Category: double helix]]
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[[Category: overhanging base]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 18:55:20 2008''
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Current revision

A 1.3 A RESOLUTION CRYSTAL STRUCTURE OF THE HIV-1 TRANS-ACTIVATION RESPONSE REGION RNA STEM REVEALS A METAL ION-DEPENDENT BULGE CONFORMATION

PDB ID 397d

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