4aux

<StructureSection load='4aux' size='340' side='right' caption='[[4aux]], [[Resolution|resolution]] 2.25&Aring;' scene=''>

<table><tr><td colspan='2'>[[4aux]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4AUX OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4AUX FirstGlance]. <br>

</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=XTC:(4S,4AS,5AR,12AS)-4-(DIMETHYLAMINO)-3,10,12,12A-TETRAHYDROXY-9-NITRO-1,11-DIOXO-1,4,4A,5,5A,6,11,12A-OCTAHYDROTETRACENE-2-CARBOXAMIDE'>XTC</scene><br>

<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1a6i|1a6i]], [[1bj0|1bj0]], [[1bjy|1bjy]], [[1bjz|1bjz]], [[1du7|1du7]], [[1ork|1ork]], [[1qpi|1qpi]], [[2tct|2tct]], [[2trt|2trt]], [[2vke|2vke]], [[2vkv|2vkv]], [[2x6o|2x6o]], [[2x9d|2x9d]], [[2xb5|2xb5]], [[2xgc|2xgc]], [[2xgd|2xgd]], [[2xge|2xge]], [[2xps|2xps]], [[2xpt|2xpt]], [[2xpu|2xpu]], [[2xpv|2xpv]], [[2xpw|2xpw]], [[2xrl|2xrl]], [[3zqf|3zqf]], [[3zqg|3zqg]], [[3zqh|3zqh]], [[3zqi|3zqi]], [[4abz|4abz]]</td></tr>

<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4aux FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4aux OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4aux RCSB], [http://www.ebi.ac.uk/pdbsum/4aux PDBsum]</span></td></tr>

<table>

<div style="background-color:#fffaf0;">

== Publication Abstract from PubMed ==

The most frequently occurring resistance of Gram-negative bacteria against tetracyclines is triggered by drug recognition of the Tet repressor. This causes dissociation of the repressor-operator DNA complex and enables expression of the resistance protein TetA, which is responsible for active efflux of tetracycline. The 2.5 angstrom resolution crystal structure of the homodimeric Tet repressor complexed with tetracycline-magnesium reveals detailed drug recognition. The orientation of the operator-binding helix-turn-helix motifs of the repressor is inverted in comparison with other DNA binding proteins. The repressor-drug complex is unable to interact with DNA because the separation of the DNA binding motifs is 5 angstroms wider than usually observed.

 

Structure of the Tet repressor-tetracycline complex and regulation of antibiotic resistance.,Hinrichs W, Kisker C, Duvel M, Muller A, Tovar K, Hillen W, Saenger W Science. 1994 Apr 15;264(5157):418-20. PMID:8153629<ref>PMID:8153629</ref>

 

*[[Tetracycline repressor protein|Tetracycline repressor protein]]

[[Category: Escherichia coli]]

[[Category: Hinrichs, W.]]

[[Category: Orth, P.]]

[[Category: Saenger, W.]]

[[Category: Antibiotic]]

[[Category: Transcription]]

[[Category: Transcription regulation]]