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==NMR study of monomeric human interleukin-8 (30 structures)==
==NMR study of monomeric human interleukin-8 (30 structures)==
<StructureSection load='1ikm' size='340' side='right'caption='[[1ikm]], [[NMR_Ensembles_of_Models | 30 NMR models]]' scene=''>
<StructureSection load='1ikm' size='340' side='right'caption='[[1ikm]]' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[1ikm]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Human Human]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1IKM OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1IKM FirstGlance]. <br>
<table><tr><td colspan='2'>[[1ikm]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1IKM OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1IKM FirstGlance]. <br>
</td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=MLE:N-METHYLLEUCINE'>MLE</scene></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1ikl|1ikl]]</div></td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MLE:N-METHYLLEUCINE'>MLE</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=1ikm FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ikm OCA], [https://pdbe.org/1ikm PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1ikm RCSB], [https://www.ebi.ac.uk/pdbsum/1ikm PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1ikm 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=1ikm FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ikm OCA], [https://pdbe.org/1ikm PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1ikm RCSB], [https://www.ebi.ac.uk/pdbsum/1ikm PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1ikm ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[[https://www.uniprot.org/uniprot/IL8_HUMAN IL8_HUMAN]] IL-8 is a chemotactic factor that attracts neutrophils, basophils, and T-cells, but not monocytes. It is also involved in neutrophil activation. It is released from several cell types in response to an inflammatory stimulus. IL-8(6-77) has a 5-10-fold higher activity on neutrophil activation, IL-8(5-77) has increased activity on neutrophil activation and IL-8(7-77) has a higher affinity to receptors CXCR1 and CXCR2 as compared to IL-8(1-77), respectively.<ref>PMID:2145175</ref> <ref>PMID:2212672</ref> <ref>PMID:11978786</ref>
[https://www.uniprot.org/uniprot/IL8_HUMAN IL8_HUMAN] IL-8 is a chemotactic factor that attracts neutrophils, basophils, and T-cells, but not monocytes. It is also involved in neutrophil activation. It is released from several cell types in response to an inflammatory stimulus. IL-8(6-77) has a 5-10-fold higher activity on neutrophil activation, IL-8(5-77) has increased activity on neutrophil activation and IL-8(7-77) has a higher affinity to receptors CXCR1 and CXCR2 as compared to IL-8(1-77), respectively.<ref>PMID:2145175</ref> <ref>PMID:2212672</ref> <ref>PMID:11978786</ref>  
== Evolutionary Conservation ==
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
[[Image:Consurf_key_small.gif|200px|right]]
Line 20: Line 20:
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1ikm ConSurf].
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1ikm ConSurf].
<div style="clear:both"></div>
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The solution structure of a monomeric form of interleukin-8 (IL-8) has been solved using 1H NMR spectroscopy. The chemically synthesized nonnatural analog [IL-8 (4-72) L25 NH--&gt;NCH3] has the same activity as that of native IL-8. Thirty structures were generated using the hybrid distance geometry and simulated annealing protocol using the program X-PLOR. The structure is well-defined except for N-terminal residues 4-6 and C-terminal residues 67-72. The rms distribution about the average structure for residues 7-66 is 0.38 A for the backbone atoms and 0.87 A for all heavy atoms. The structure consists of a series of turns and loops followed by a triple-stranded beta sheet and a C-terminal alpha helix. The structure of the monomer is largely similar to the native dimeric IL-8 structures previously determined by both NMR and X-ray methods. The major difference is that, in the monomeric analog, the C-terminal residues 67-72 are disordered whereas they are helical in the two dimeric structures. The best fit superposition of the backbone atoms of residues 7-66 of the monomer structure on the dimeric IL-8 structures showed rms differences of 1.5 and 1.2 A respectively. The turn (residues 31-35), which is disulfide linked to the N-terminal region, adopts a conformation in the monomer similar to that seen in the dimeric X-ray structure (rms difference 1.4 A) and different from that seen in the dimeric NMR structure (rms difference 2.7 A).(ABSTRACT TRUNCATED AT 250 WORDS)
1H NMR solution structure of an active monomeric interleukin-8.,Rajarathnam K, Clark-Lewis I, Sykes BD Biochemistry. 1995 Oct 10;34(40):12983-90. PMID:7548056<ref>PMID:7548056</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 1ikm" style="background-color:#fffaf0;"></div>


==See Also==
==See Also==
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__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Human]]
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Large Structures]]
[[Category: Clark-Lewis, I]]
[[Category: Clark-Lewis I]]
[[Category: Rajarathnam, K]]
[[Category: Rajarathnam K]]
[[Category: Sykes, B D]]
[[Category: Sykes BD]]

Revision as of 10:47, 3 April 2024

NMR study of monomeric human interleukin-8 (30 structures)NMR study of monomeric human interleukin-8 (30 structures)

Structural highlights

1ikm is a 1 chain structure with sequence from Homo sapiens. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:Solution NMR
Ligands:
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

IL8_HUMAN IL-8 is a chemotactic factor that attracts neutrophils, basophils, and T-cells, but not monocytes. It is also involved in neutrophil activation. It is released from several cell types in response to an inflammatory stimulus. IL-8(6-77) has a 5-10-fold higher activity on neutrophil activation, IL-8(5-77) has increased activity on neutrophil activation and IL-8(7-77) has a higher affinity to receptors CXCR1 and CXCR2 as compared to IL-8(1-77), respectively.[1] [2] [3]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

See Also

References

  1. ↑ Van Damme J, Rampart M, Conings R, Decock B, Van Osselaer N, Willems J, Billiau A. The neutrophil-activating proteins interleukin 8 and beta-thromboglobulin: in vitro and in vivo comparison of NH2-terminally processed forms. Eur J Immunol. 1990 Sep;20(9):2113-8. PMID:2145175 doi:http://dx.doi.org/10.1002/eji.1830200933
  2. ↑ Hebert CA, Luscinskas FW, Kiely JM, Luis EA, Darbonne WC, Bennett GL, Liu CC, Obin MS, Gimbrone MA Jr, Baker JB. Endothelial and leukocyte forms of IL-8. Conversion by thrombin and interactions with neutrophils. J Immunol. 1990 Nov 1;145(9):3033-40. PMID:2212672
  3. ↑ Schutyser E, Struyf S, Proost P, Opdenakker G, Laureys G, Verhasselt B, Peperstraete L, Van de Putte I, Saccani A, Allavena P, Mantovani A, Van Damme J. Identification of biologically active chemokine isoforms from ascitic fluid and elevated levels of CCL18/pulmonary and activation-regulated chemokine in ovarian carcinoma. J Biol Chem. 2002 Jul 5;277(27):24584-93. Epub 2002 Apr 26. PMID:11978786 doi:http://dx.doi.org/10.1074/jbc.M112275200
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