View source for 6czf


==The structure of E. coli PurF in complex with ppGpp-Mg==
<StructureSection load='6czf' size='340' side='right'caption='[[6czf]], [[Resolution|resolution]] 1.95&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6czf]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_K-12 Escherichia coli K-12]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6CZF OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6CZF FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.949&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=G4P:GUANOSINE-5,3-TETRAPHOSPHATE'>G4P</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=6czf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6czf OCA], [https://pdbe.org/6czf PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6czf RCSB], [https://www.ebi.ac.uk/pdbsum/6czf PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6czf ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/PUR1_ECOLI PUR1_ECOLI] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The nucleotide ppGpp is a highly conserved regulatory molecule in bacteria that helps tune growth rate to nutrient availability. Despite decades of study, how ppGpp regulates growth remains poorly understood. Here, we developed and validated a capture-compound mass spectrometry approach that identified &gt;50 putative ppGpp targets in Escherichia coli. These targets control many key cellular processes and include 13 enzymes required for nucleotide synthesis. We demonstrated that ppGpp inhibits the de novo synthesis of all purine nucleotides by directly targeting the enzyme PurF. By solving a structure of PurF bound to ppGpp, we designed a mutation that ablates ppGpp-based regulation, leading to dysregulation of purine-nucleotide synthesis following ppGpp accumulation. Collectively, our results provide new insights into ppGpp-based growth control and a nearly comprehensive set of targets for future exploration. The capture compounds developed should also enable the rapid identification of ppGpp targets in any species, including pathogens.

Affinity-based capture and identification of protein effectors of the growth regulator ppGpp.,Wang B, Dai P, Ding D, Del Rosario A, Grant RA, Pentelute BL, Laub MT Nat Chem Biol. 2018 Dec 17. pii: 10.1038/s41589-018-0183-4. doi:, 10.1038/s41589-018-0183-4. PMID:30559427<ref>PMID:30559427</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6czf" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Escherichia coli K-12]]
[[Category: Large Structures]]
[[Category: Grant RA]]
[[Category: Laub MT]]
[[Category: Wang B]]