PMID- 28870516 OWN - NLM STAT- MEDLINE DCOM- 20180720 LR - 20180720 IS - 1873-569X (Electronic) IS - 0923-1811 (Linking) VI - 88 IP - 3 DP - 2017 Dec TI - A docking model of dapsone bound to HLA-B*13:01 explains the risk of dapsone hypersensitivity syndrome. PG - 320-329 LID - S0923-1811(17)30539-X [pii] LID - 10.1016/j.jdermsci.2017.08.007 [doi] AB - BACKGROUND: Dapsone (4,4'-diaminodiphenylsulfone) has been widely used for the treatment of infections such as leprosy. Dapsone hypersensitivity syndrome (DHS) is a major side effect, developing in 0.5-3.6% of patients treated with dapsone, and its mortality rate is approximately 10%. Recently, human leukocyte antigen (HLA)-B*13:01 was identified as a marker of susceptibility to DHS. OBJECTIVES: To investigate why HLA-B*13:01 is responsible for DHS from a structural point of view. METHODS: First, we used homology modeling to derive the three-dimensional structures of HLA-B*13:01 (associated with DHS) and HLA-B*13:02 (not so associated despite strong sequence identity [99%] with HLA-B*13:01). Next, we used molecular docking, molecular dynamic simulations, and the molecular mechanics Poisson-Boltzman surface area method, to investigate the interactions of dapsone with HLA-B*13:01 and 13:02. RESULTS: We found a crucial structural difference between HLA-B*13:01 and 13:02 in the F-pocket of the antigen-binding site. As Trp95 in the alpha-domain of HLA-B*13:02 is replaced with the less bulky Ile95 in HLA-B*13:01, we found an additional well-defined sub-pocket within the antigen-binding site of HLA-B*13:01. All three representative docking poses of dapsone against the antigen-binding site of HLA-B*13:01 used this unique sub-pocket, indicating its suitability for binding dapsone. However, HLA-B*13:02 does not seem to possess a binding pocket suitable for binding dapsone. Finally, a binding free energy calculation combined with a molecular dynamics simulation and the molecular mechanics Poisson-Boltzman surface area method indicated that the binding affinity of dapsone for HLA-B*13:01 would be much greater than that for HLA-B*13:02. CONCLUSIONS: Our computational results suggest that dapsone would fit within the structure of the antigen-recognition site of HLA-B*13:01. This may change the self-peptides that bind to HLA-B*13:01, explaining why HLA-B*13:01 is a marker of DHS susceptibility. CI - Copyright (c) 2017 Japanese Society for Investigative Dermatology. Published by Elsevier B.V. All rights reserved. FAU - Watanabe, Hideaki AU - Watanabe H AD - Department of Dermatology, Showa University School of Medicine, Tokyo, Japan. Electronic address: hwatanabe@med.showa-u.ac.jp. FAU - Watanabe, Yurie AU - Watanabe Y AD - Department of Analytical and Physical Chemistry, Showa University School of Pharmacy, Tokyo, Japan. FAU - Tashiro, Yasuya AU - Tashiro Y AD - Department of Dermatology, Showa University School of Medicine, Tokyo, Japan. FAU - Mushiroda, Taisei AU - Mushiroda T AD - RIKEN Center for Integrative Medical Sciences, Yokohama, Japan. FAU - Ozeki, Takeshi AU - Ozeki T AD - RIKEN Center for Integrative Medical Sciences, Yokohama, Japan. FAU - Hashizume, Hideo AU - Hashizume H AD - Department of Dermatology, Shimada Municipal Hospital, Shizuoka, Japan. FAU - Sueki, Hirohiko AU - Sueki H AD - Department of Dermatology, Showa University School of Medicine, Tokyo, Japan. FAU - Yamamoto, Toshinori AU - Yamamoto T AD - Showa University Medical Foundation, Showa University School of Pharmacy, Tokyo, Japan. FAU - Utsunomiya-Tate, Naoko AU - Utsunomiya-Tate N AD - Laboratory of Chemistry, Faculty of Pharma Sciences, Teikyo University, Tokyo, Japan. FAU - Gouda, Hiroaki AU - Gouda H AD - Department of Analytical and Physical Chemistry, Showa University School of Pharmacy, Tokyo, Japan. Electronic address: godah@pharm.showa-u.ac.jp. FAU - Kusakabe, Yoshio AU - Kusakabe Y AD - Department of Analytical and Physical Chemistry, Showa University School of Pharmacy, Tokyo, Japan; Laboratory of Chemistry, Faculty of Pharma Sciences, Teikyo University, Tokyo, Japan. LA - eng PT - Journal Article DEP - 20170824 PL - Netherlands TA - J Dermatol Sci JT - Journal of dermatological science JID - 9011485 RN - 0 (HLA-B Antigens) RN - 0 (Leprostatic Agents) RN - 8W5C518302 (Dapsone) SB - IM MH - Computational Biology MH - Dapsone/adverse effects/immunology/*metabolism MH - Drug Hypersensitivity Syndrome/etiology/*immunology MH - HLA-B Antigens/immunology/*metabolism MH - Humans MH - Leprostatic Agents/adverse effects/*metabolism MH - Leprosy/*drug therapy MH - Molecular Docking Simulation MH - Molecular Dynamics Simulation MH - Protein Binding MH - Sequence Homology, Amino Acid OTO - NOTNLM OT - Binding affinity OT - Dapsone hypersensitivity syndrome OT - Docking simulation OT - HLA-B*13:01 OT - Molecular structure EDAT- 2017/09/06 06:00 MHDA- 2018/07/22 06:00 CRDT- 2017/09/06 06:00 PHST- 2017/04/04 00:00 [received] PHST- 2017/07/04 00:00 [revised] PHST- 2017/08/08 00:00 [accepted] PHST- 2017/09/06 06:00 [pubmed] PHST- 2018/07/22 06:00 [medline] PHST- 2017/09/06 06:00 [entrez] AID - S0923-1811(17)30539-X [pii] AID - 10.1016/j.jdermsci.2017.08.007 [doi] PST - ppublish SO - J Dermatol Sci. 2017 Dec;88(3):320-329. doi: 10.1016/j.jdermsci.2017.08.007. Epub 2017 Aug 24.