3lya: Difference between revisions

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<StructureSection load='3lya' size='340' side='right'caption='[[3lya]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
<StructureSection load='3lya' size='340' side='right'caption='[[3lya]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[3lya]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_mg1655 Escherichia coli mg1655]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3LYA OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3LYA FirstGlance]. <br>
<table><tr><td colspan='2'>[[3lya]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_str._K-12_substr._MG1655 Escherichia coli str. K-12 substr. MG1655]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3LYA OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3LYA FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=RHE:RHENIUM+(IV)+HEXACHLORIDE'>RHE</scene></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.3&#8491;</td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[3ly7|3ly7]], [[3ly8|3ly8]], [[3ly9|3ly9]]</div></td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=RHE:RHENIUM+(IV)+HEXACHLORIDE'>RHE</scene></td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">b4133, cadC, JW4094 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=511145 Escherichia coli MG1655])</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=3lya FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3lya OCA], [https://pdbe.org/3lya PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3lya RCSB], [https://www.ebi.ac.uk/pdbsum/3lya PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3lya ProSAT]</span></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=3lya FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3lya OCA], [https://pdbe.org/3lya PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3lya RCSB], [https://www.ebi.ac.uk/pdbsum/3lya PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3lya ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[[https://www.uniprot.org/uniprot/CADC_ECOLI CADC_ECOLI]] Required for Pcad induction, a promoter upstream of cadBA that is responsible for the pH-regulated expression of CadA and CadB. Probably acts as an activating transcription factor.<ref>PMID:1370290</ref> 
[https://www.uniprot.org/uniprot/CADC_ECOLI CADC_ECOLI] Required for Pcad induction, a promoter upstream of cadBA that is responsible for the pH-regulated expression of CadA and CadB. Probably acts as an activating transcription factor.<ref>PMID:1370290</ref>  
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The membrane-integral transcriptional activator CadC comprises sensory and transcriptional regulatory functions within one polypeptide chain. Its C-terminal periplasmic domain, CadC(pd) , is responsible for sensing of environmental pH as well as for binding of the feedback inhibitor cadaverine. Here we describe the crystal structure of CadC(pd) (residues 188-512) solved at a resolution of 1.8 A via multiple wavelength anomalous dispersion (MAD) using a ReCl(6) (2-) derivative. CadC(pd) reveals a novel fold comprising two subdomains: an N-terminal subdomain dominated by a $\tilde \beta$sheet in contact with three alpha-helices and a C-terminal subdomain formed by a ten-membered alpha-helical bundle, which is oriented almost perpendicular to the helices in the first subdomain. Further to the native protein, crystal structures were also solved for its variants D471N and D471E, which show functionally different behavior in pH sensing. Interestingly, in the heavy metal derivative of CadC(pd) used for MAD phasing a ReCl(6) (2-) ion was found in a cavity located between the two subdomains. Amino acid side chains that coordinate this complex ion are conserved in CadC homologues from various bacterial species, suggesting a function of the cavity in the binding of cadaverine, which was supported by docking studies. Notably, CadC(pd) and its variants form dimers in solution, which can be explained by an extended, albeit rather polar interface between two symmetry-related monomers in the crystal structure. The occurrence of several acidic residues in this region suggests protonation-dependent changes in the mode of dimerization, which could eventually trigger transcriptional activation by CadC in the bacterial cytoplasm.
 
Crystal structure of the sensory domain of Escherichia coli CadC, a member of the ToxR-like protein family.,Eichinger A, Haneburger I, Koller C, Jung K, Skerra A Protein Sci. 2011 Jan 24. doi: 10.1002/pro.594. PMID:21308846<ref>PMID:21308846</ref>
 
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 3lya" style="background-color:#fffaf0;"></div>


==See Also==
==See Also==
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__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Escherichia coli mg1655]]
[[Category: Escherichia coli str. K-12 substr. MG1655]]
[[Category: Large Structures]]
[[Category: Large Structures]]
[[Category: Eichinger, A]]
[[Category: Eichinger A]]
[[Category: Skerra, A]]
[[Category: Skerra A]]
[[Category: Activator]]
[[Category: Alpha domain]]
[[Category: Alpha/beta domain]]
[[Category: Dna-binding]]
[[Category: Signaling protein]]
[[Category: Transcription regulation]]
[[Category: Two-component regulatory system]]

Revision as of 11:47, 7 February 2024

Crystal structure of the periplasmic domain of CadC in the presence of K2ReCl6Crystal structure of the periplasmic domain of CadC in the presence of K2ReCl6

Structural highlights

3lya is a 1 chain structure with sequence from Escherichia coli str. K-12 substr. MG1655. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2.3Å
Ligands:
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

CADC_ECOLI Required for Pcad induction, a promoter upstream of cadBA that is responsible for the pH-regulated expression of CadA and CadB. Probably acts as an activating transcription factor.[1]

See Also

References

  1. ↑ Watson N, Dunyak DS, Rosey EL, Slonczewski JL, Olson ER. Identification of elements involved in transcriptional regulation of the Escherichia coli cad operon by external pH. J Bacteriol. 1992 Jan;174(2):530-40. PMID:1370290

3lya, resolution 2.30Å

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