1qe6

From Proteopedia

(Difference between revisions)

Revision as of 21:51, 25 December 2014

INTERLEUKIN-8 WITH AN ADDED DISULFIDE BETWEEN RESIDUES 5 AND 33 (L5C/H33C)

Structural highlights

1qe6 is a 4 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Related:	3il8, 1icw
Resources:	FirstGlance, OCA, RCSB, PDBsum

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.

Publication Abstract from PubMed

The "ELR" (Glu-Leu-Arg) tripeptide sequence near the N-terminus of interleukin-8 (IL-8) contributes a large part of the receptor binding free energy. Prior X-ray and nuclear magnetic resonance (NMR) structures of IL-8 have shown this region of the molecule to be highly mobile. We reasoned that a hydrophobic interaction between the leucine and the neighboring beta-turn might exist in the receptor binding conformation of the N-terminus. To test this hypothesis, we mutated two residues to cysteine and connected the N-terminus to the beta-turn. The mutant retains receptor binding affinity reasonably close to wild type and allows the characterization of a high-affinity conformation that may be useful in the design of small IL-8 mimics. The L5C/H33C mutant is refined to R-values of R = 20.6% and Rfree = 27.7% at 2.35 A resolution. Other receptor binding determinants reside in the "N-loop" found after "ELR" and preceding the first beta-strand. All available structures of IL-8 have been found with one of two distinct N-loop conformations. One of these is relevant for receptor binding, based on NMR results with receptor peptides. The other conformation obscures the receptor-peptide binding surface and may have an undetermined but necessarily different function.

Receptor-binding conformation of the "ELR" motif of IL-8: X-ray structure of the L5C/H33C variant at 2.35 A resolution.,Gerber N, Lowman H, Artis DR, Eigenbrot C Proteins. 2000 Mar 1;38(4):361-7. PMID:10707023^[4]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ 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
↑ 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
↑ 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
↑ Gerber N, Lowman H, Artis DR, Eigenbrot C. Receptor-binding conformation of the "ELR" motif of IL-8: X-ray structure of the L5C/H33C variant at 2.35 A resolution. Proteins. 2000 Mar 1;38(4):361-7. PMID:10707023

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 See Also
6 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1qe6"

@@ Line 3: / Line 3: @@
 == Structural highlights ==
 <table><tr><td colspan='2'>[[1qe6]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1QE6 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1QE6 FirstGlance]. <br>
-</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene><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>
-<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3il8|3il8]], [[1icw|1icw]]</td></tr>
+<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3il8|3il8]], [[1icw|1icw]]</td></tr>
-<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1qe6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1qe6 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1qe6 RCSB], [http://www.ebi.ac.uk/pdbsum/1qe6 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=1qe6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1qe6 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1qe6 RCSB], [http://www.ebi.ac.uk/pdbsum/1qe6 PDBsum]</span></td></tr>
-<table>
+</table>
+== Function ==
+[[http://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 ==
 [[Image:Consurf_key_small.gif|200px|right]]
@@ Line 33: / Line 35: @@
 </StructureSection>
 [[Category: Homo sapiens]]
-[[Category: Artis, D R.]]
+[[Category: Artis, D R]]
-[[Category: Eigenbrot, C.]]
+[[Category: Eigenbrot, C]]
-[[Category: Gerber, N.]]
+[[Category: Gerber, N]]
-[[Category: Lowman, H.]]
+[[Category: Lowman, H]]
 [[Category: Immune system]]
 [[Category: Intercrine alpha family]]

1qe6

From Proteopedia

Revision as of 21:51, 25 December 2014

INTERLEUKIN-8 WITH AN ADDED DISULFIDE BETWEEN RESIDUES 5 AND 33 (L5C/H33C)

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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