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==Siderocalin Recognitin of Carboxymycobactins: Interference by the immune system in intracellular iron acquisition by Mycobacteria tuberculosis== | ==Siderocalin Recognitin of Carboxymycobactins: Interference by the immune system in intracellular iron acquisition by Mycobacteria tuberculosis== | ||
<StructureSection load='3ped' size='340' side='right' caption='[[3ped]], [[Resolution|resolution]] 2.30Å' scene=''> | <StructureSection load='3ped' size='340' side='right' caption='[[3ped]], [[Resolution|resolution]] 2.30Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[3ped]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/ | <table><tr><td colspan='2'>[[3ped]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3PED OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3PED FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=FE:FE+(III)+ION'>FE</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=ZYF:(9Z)-11-{HYDROXY[(5S)-6-{[(1S)-3-{[(3S)-1-HYDROXY-2-OXOAZEPAN-3-YL]AMINO}-1-METHYL-3-OXOPROPYL]OXY}-5-({[(4S)-2-(2-HYDROXYPHENYL)-4,5-DIHYDRO-1,3-OXAZOL-4-YL]CARBONYL}AMINO)-6-OXOHEXYL]AMINO}-11-OXOUNDEC-9-ENOIC+ACID'>ZYF</scene></td></tr> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=FE:FE+(III)+ION'>FE</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=ZYF:(9Z)-11-{HYDROXY[(5S)-6-{[(1S)-3-{[(3S)-1-HYDROXY-2-OXOAZEPAN-3-YL]AMINO}-1-METHYL-3-OXOPROPYL]OXY}-5-({[(4S)-2-(2-HYDROXYPHENYL)-4,5-DIHYDRO-1,3-OXAZOL-4-YL]CARBONYL}AMINO)-6-OXOHEXYL]AMINO}-11-OXOUNDEC-9-ENOIC+ACID'>ZYF</scene></td></tr> | ||
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1x89|1x89]], [[1x8u|1x8u]], [[3pec|3pec]]</td></tr> | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1x89|1x89]], [[1x8u|1x8u]], [[3pec|3pec]]</td></tr> | ||
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">LCN2, HNL, NGAL ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">LCN2, HNL, NGAL ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</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=3ped FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3ped OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3ped RCSB], [http://www.ebi.ac.uk/pdbsum/3ped PDBsum]</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=3ped FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3ped OCA], [http://pdbe.org/3ped PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3ped RCSB], [http://www.ebi.ac.uk/pdbsum/3ped PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3ped ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
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__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: | [[Category: Human]] | ||
[[Category: Clifton, M C]] | [[Category: Clifton, M C]] | ||
[[Category: 8-stranded anti-parallel beta barrel]] | [[Category: 8-stranded anti-parallel beta barrel]] | ||
Revision as of 03:57, 5 August 2016
Siderocalin Recognitin of Carboxymycobactins: Interference by the immune system in intracellular iron acquisition by Mycobacteria tuberculosisSiderocalin Recognitin of Carboxymycobactins: Interference by the immune system in intracellular iron acquisition by Mycobacteria tuberculosis
Structural highlights
Function[NGAL_HUMAN] Iron-trafficking protein involved in multiple processes such as apoptosis, innate immunity and renal development. Binds iron through association with 2,5-dihydroxybenzoic acid (2,5-DHBA), a siderophore that shares structural similarities with bacterial enterobactin, and delivers or removes iron from the cell, depending on the context. Iron-bound form (holo-24p3) is internalized following binding to the SLC22A17 (24p3R) receptor, leading to release of iron and subsequent increase of intracellular iron concentration. In contrast, association of the iron-free form (apo-24p3) with the SLC22A17 (24p3R) receptor is followed by association with an intracellular siderophore, iron chelation and iron transfer to the extracellular medium, thereby reducing intracellular iron concentration. Involved in apoptosis due to interleukin-3 (IL3) deprivation: iron-loaded form increases intracellular iron concentration without promoting apoptosis, while iron-free form decreases intracellular iron levels, inducing expression of the proapoptotic protein BCL2L11/BIM, resulting in apoptosis. Involved in innate immunity, possibly by sequestrating iron, leading to limit bacterial growth.[1] See AlsoReferences |
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