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| | ==Crystal structure of alpha sub-domain of Lon protease from Brevibacillus thermoruber== | | ==Crystal structure of alpha sub-domain of Lon protease from Brevibacillus thermoruber== |
| - | <StructureSection load='4git' size='340' side='right' caption='[[4git]], [[Resolution|resolution]] 2.88Å' scene=''> | + | <StructureSection load='4git' size='340' side='right'caption='[[4git]], [[Resolution|resolution]] 2.88Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4git]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_thermoruber"_guicciardi_et_al._1968 "bacillus thermoruber" guicciardi et al. 1968]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4GIT OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4GIT FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4git]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Brevibacillus_thermoruber Brevibacillus thermoruber]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4GIT OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4GIT FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> | + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">lon ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=33942 "Bacillus thermoruber" Guicciardi et al. 1968])</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=4git FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4git OCA], [https://pdbe.org/4git PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4git RCSB], [https://www.ebi.ac.uk/pdbsum/4git PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4git ProSAT]</span></td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Endopeptidase_La Endopeptidase La], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.21.53 3.4.21.53] </span></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=4git FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4git OCA], [http://pdbe.org/4git PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4git RCSB], [http://www.ebi.ac.uk/pdbsum/4git PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4git ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/Q84FG5_9BACL Q84FG5_9BACL]] ATP-dependent serine protease that mediates the selective degradation of mutant and abnormal proteins as well as certain short-lived regulatory proteins. Required for cellular homeostasis and for survival from DNA damage and developmental changes induced by stress. Degrades polypeptides processively to yield small peptide fragments that are 5 to 10 amino acids long. Binds to DNA in a double-stranded, site-specific manner (By similarity).[HAMAP-Rule:MF_01973] | + | [https://www.uniprot.org/uniprot/Q84FG5_9BACL Q84FG5_9BACL] ATP-dependent serine protease that mediates the selective degradation of mutant and abnormal proteins as well as certain short-lived regulatory proteins. Required for cellular homeostasis and for survival from DNA damage and developmental changes induced by stress. Degrades polypeptides processively to yield small peptide fragments that are 5 to 10 amino acids long. Binds to DNA in a double-stranded, site-specific manner (By similarity).[HAMAP-Rule:MF_01973] |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Bacillus thermoruber guicciardi et al. 1968]] | + | [[Category: Brevibacillus thermoruber]] |
| - | [[Category: Endopeptidase La]] | + | [[Category: Large Structures]] |
| - | [[Category: Chang, Y Y]] | + | [[Category: Chang YY]] |
| - | [[Category: Chen, Y D]] | + | [[Category: Chen YD]] |
| - | [[Category: Hsu, C H]] | + | [[Category: Hsu CH]] |
| - | [[Category: Dna binding]]
| + | |
| - | [[Category: Hydrolase]]
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| Structural highlights
Function
Q84FG5_9BACL ATP-dependent serine protease that mediates the selective degradation of mutant and abnormal proteins as well as certain short-lived regulatory proteins. Required for cellular homeostasis and for survival from DNA damage and developmental changes induced by stress. Degrades polypeptides processively to yield small peptide fragments that are 5 to 10 amino acids long. Binds to DNA in a double-stranded, site-specific manner (By similarity).[HAMAP-Rule:MF_01973]
Publication Abstract from PubMed
Lon belongs to a unique group of AAA+ proteases that bind DNA. However, the DNA-mediated regulation of Lon remains elusive. Here, the crystal structure of the alpha subdomain of the Lon protease from Brevibacillus thermoruber (Bt-Lon) is presented, together with biochemical data, and the DNA-binding mode is delineated, showing that Arg518, Arg557 and Arg566 play a crucial role in DNA binding. Electrostatic interactions contributed by arginine residues in the AAA+ module are suggested to be important to DNA binding and allosteric regulation of enzymatic activities. Intriguingly, Arg557, which directly binds DNA in the alpha subdomain, has a dual role in the negative regulation of ATPase stimulation by DNA and in the domain-domain communication in allosteric regulation of Bt-Lon by substrate. In conclusion, structural and biochemical evidence is provided to show that electrostatic interaction in the AAA+ module is important for DNA binding by Lon and allosteric regulation of its enzymatic activities by DNA and substrate.
Structural basis for DNA-mediated allosteric regulation facilitated by the AAA+ module of Lon protease.,Lee AY, Chen YD, Chang YY, Lin YC, Chang CF, Huang SJ, Wu SH, Hsu CH Acta Crystallogr D Biol Crystallogr. 2014 Feb;70(Pt 2):218-30. doi:, 10.1107/S139900471302631X. Epub 2014 Jan 17. PMID:24531457[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Lee AY, Chen YD, Chang YY, Lin YC, Chang CF, Huang SJ, Wu SH, Hsu CH. Structural basis for DNA-mediated allosteric regulation facilitated by the AAA+ module of Lon protease. Acta Crystallogr D Biol Crystallogr. 2014 Feb;70(Pt 2):218-30. doi:, 10.1107/S139900471302631X. Epub 2014 Jan 17. PMID:24531457 doi:http://dx.doi.org/10.1107/S139900471302631X
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