PMID- 26057800 OWN - NLM STAT- MEDLINE DCOM- 20160307 LR - 20231111 IS - 2053-230X (Electronic) IS - 2053-230X (Linking) VI - 71 IP - Pt 6 DP - 2015 Jun TI - Crystallization of interleukin-18 for structure-based inhibitor design. PG - 710-7 LID - 10.1107/S2053230X15006871 [doi] AB - Interleukin-18 (IL-18) is a pleiotropic pro-inflammatory cytokine belonging to the IL-1 superfamily. IL-18 plays an important role in host innate and acquired immune defense, with its activity being modulated in vivo by its naturally occurring antagonist IL-18 binding protein (IL-18BP). Recent crystal structures of human IL-18 (hIL-18) in complex with its antagonist or cognate receptor(s) have revealed a conserved binding interface on hIL-18 representing a promising drug target. An important step in this process is obtaining crystals of apo hIL-18 or hIL-18 in complex with small-molecule inhibitors, preferably under low ionic strength conditions. In this study, surface-entropy reduction (SER) and rational protein design were employed to facilitate the crystallization of hIL-18. The results provide an excellent platform for structure-based drug design. FAU - Krumm, Brian AU - Krumm B AD - Department of Biochemistry and Molecular Biology, Oklahoma State University, Stillwater, OK 74078, USA. FAU - Meng, Xiangzhi AU - Meng X AD - Department of Microbiology and Immunology, University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Drive, San Antonio, TX 78229, USA. FAU - Xiang, Yan AU - Xiang Y AD - Department of Microbiology and Immunology, University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Drive, San Antonio, TX 78229, USA. FAU - Deng, Junpeng AU - Deng J AD - Department of Biochemistry and Molecular Biology, Oklahoma State University, Stillwater, OK 74078, USA. LA - eng SI - PDB/4XFS SI - PDB/4XFT SI - PDB/4XFU GR - R01 AI079217/AI/NIAID NIH HHS/United States GR - R21 AI113539/AI/NIAID NIH HHS/United States GR - AI079217/AI/NIAID NIH HHS/United States GR - AI113539/AI/NIAID NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. DEP - 20150520 PL - United States TA - Acta Crystallogr F Struct Biol Commun JT - Acta crystallographica. Section F, Structural biology communications JID - 101620319 RN - 0 (IL18 protein, human) RN - 0 (Intercellular Signaling Peptides and Proteins) RN - 0 (Interleukin-18) RN - 0 (Ligands) RN - 0 (Recombinant Fusion Proteins) RN - 0 (interleukin-18 binding protein) SB - IM MH - Amino Acid Motifs MH - Crystallization MH - Crystallography, X-Ray MH - Escherichia coli/genetics/metabolism MH - Gene Expression MH - Humans MH - Intercellular Signaling Peptides and Proteins/chemistry MH - Interleukin-18/*chemistry/genetics MH - Ligands MH - Models, Molecular MH - Molecular Sequence Data MH - Mutation MH - Osmolar Concentration MH - Protein Binding MH - *Protein Engineering MH - Protein Structure, Secondary MH - Protein Structure, Tertiary MH - Recombinant Fusion Proteins/*chemistry/genetics MH - Surface Properties MH - Thermodynamics PMC - PMC4461335 OTO - NOTNLM OT - cytokines OT - immune defense OT - interleukin-18 OT - surface-entropy reduction EDAT- 2015/06/10 06:00 MHDA- 2016/03/08 06:00 PMCR- 2016/06/01 CRDT- 2015/06/10 06:00 PHST- 2015/01/16 00:00 [received] PHST- 2015/04/06 00:00 [accepted] PHST- 2015/06/10 06:00 [entrez] PHST- 2015/06/10 06:00 [pubmed] PHST- 2016/03/08 06:00 [medline] PHST- 2016/06/01 00:00 [pmc-release] AID - S2053230X15006871 [pii] AID - sw5081 [pii] AID - 10.1107/S2053230X15006871 [doi] PST - ppublish SO - Acta Crystallogr F Struct Biol Commun. 2015 Jun;71(Pt 6):710-7. doi: 10.1107/S2053230X15006871. Epub 2015 May 20.