1rzr

<StructureSection load='1rzr' size='340' side='right' caption='[[1rzr]], [[Resolution|resolution]] 2.80&Aring;' scene=''>

<table><tr><td colspan='2'>[[1rzr]] is a 12 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_14581 Atcc 14581]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1RZR OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1RZR FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>

<tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene>, <scene name='pdbligand=SEP:PHOSPHOSERINE'>SEP</scene></td></tr>

<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">CCPA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1404 ATCC 14581]), PTSH ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1404 ATCC 14581])</td></tr>

<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1rzr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1rzr OCA], [http://pdbe.org/1rzr PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1rzr RCSB], [http://www.ebi.ac.uk/pdbsum/1rzr PDBsum]</span></td></tr>

[[http://www.uniprot.org/uniprot/CCPA_BACME CCPA_BACME]] Global transcriptional regulator of carbon catabolite repression (CCR) and carbon catabolite activation (CCA), which ensures optimal energy usage under diverse conditions (By similarity). [[http://www.uniprot.org/uniprot/PTHP_BACME PTHP_BACME]] General (non sugar-specific) component of the phosphoenolpyruvate-dependent sugar phosphotransferase system (sugar PTS). This major carbohydrate active-transport system catalyzes the phosphorylation of incoming sugar substrates concomitantly with their translocation across the cell membrane. The phosphoryl group from phosphoenolpyruvate (PEP) is transferred to the phosphoryl carrier protein HPr by enzyme I. Phospho-HPr then transfers it to the permease (enzymes II/III) (By similarity). P-Ser-HPr interacts with the catabolite control protein A (CcpA), forming a complex that binds to DNA at the catabolite response elements cre, operator sites preceding a large number of catabolite-regulated genes. Thus, P-Ser-HPr is a corepressor in carbon catabolite repression (CCR), a mechanism that allows bacteria to coordinate and optimize the utilization of available carbon sources. P-Ser-HPr also plays a role in inducer exclusion, in which it probably interacts with several non-PTS permeases and inhibits their transport activity (By similarity).

<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/rz/1rzr_consurf.spt"</scriptWhenChecked>

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== Publication Abstract from PubMed ==

Carbon catabolite repression (CCR) is one of the most fundamental environmental-sensing mechanisms in bacteria and imparts competitive advantage by establishing priorities in carbon metabolism. In gram-positive bacteria, the master transcription regulator of CCR is CcpA. CcpA is a LacI-GalR family member that employs, as an allosteric corepressor, the phosphoprotein HPr-Ser46-P, which is formed in glucose-replete conditions. Here we report structures of the Bacillus megaterium apoCcpA and a CcpA-(HPr-Ser46-P)-DNA complex. These structures reveal that HPr-Ser46-P mediates a novel two-component allosteric DNA binding activation mechanism that involves both rotation of the CcpA subdomains and relocation of pivot-point residue Thr61, which leads to juxtaposition of the DNA binding regions permitting "hinge" helix formation in the presence of cognate DNA. The structure of the CcpA-(HPr-Ser46-P)-cre complex also reveals the elegant mechanism by which CcpA family-specific interactions with HPr-Ser46-P residues Ser46-P and His15 partition the high-energy CCR and low-energy PTS pathways, the latter requiring HPr-His15-P.

Structural basis for allosteric control of the transcription regulator CcpA by the phosphoprotein HPr-Ser46-P.,Schumacher MA, Allen GS, Diel M, Seidel G, Hillen W, Brennan RG Cell. 2004 Sep 17;118(6):731-41. PMID:15369672<ref>PMID:15369672</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

</div>

<div class="pdbe-citations 1rzr" style="background-color:#fffaf0;"></div>

*[[Catabolite control protein|Catabolite control protein]]

*[[Phosphocarrier protein HPr|Phosphocarrier protein HPr]]

[[Category: Atcc 14581]]

[[Category: Allen, G S]]

[[Category: Brennan, R G]]

[[Category: Schumacher, M A]]

[[Category: Phospho-protein]]

[[Category: Transcription-transport protein-dna complex]]