PMID- 26488421 OWN - NLM STAT- MEDLINE DCOM- 20170224 LR - 20170817 IS - 1538-0254 (Electronic) IS - 0739-1102 (Linking) VI - 34 IP - 8 DP - 2016 Aug TI - Structural modeling of HLA-B*1502/peptide/carbamazepine/T-cell receptor complex architecture: implication for the molecular mechanism of carbamazepine-induced Stevens-Johnson syndrome/toxic epidermal necrolysis. PG - 1806-17 LID - 10.1080/07391102.2015.1092476 [doi] AB - Drug-induced adverse reactions are a significant problem in healthcare worldwide and are estimated to cost billions of dollars annually in the United States. A portion of such reactions is observed to strongly associate with certain human leukocyte antigen (HLA) alleles; one of the strongest associations is the HLA-B*1502 protein with carbamazepine (CBZ)-induced Stevens-Johnson syndrome/toxic epidermal necrolysis (SJS/TEN) - the odds ratio value can even be higher than one thousand. The particularly strong association in CBZ-induced SJS/TEN suggests that the HLA-B*1502 is not only a genetic marker but also a participant in the pathogenesis of the disease. In the current study, we attempt to computationally model the atomic-level structure of the complete HLA-B*1502/peptide/CBZ/T-cell receptor (TCR) complex architecture based on prior knowledge obtained from epidemiological investigations as well as in vitro and in vivo assays. The model tells a different story about the molecular mechanism of CBZ-induced SJS/TEN from that previously reported for abacavir (ABC)-induced hypersensitivity (HSR); the CBZ molecule is located at the interface between HLA-B*1502/peptide and TCR, directly contacts the P3-P6 residues of antigen peptide, and bound within a pocket region encompassed by two TCR CDR3 fingers. Molecular dynamics simulation and binding energy analysis further reveal that the CBZ shows considerably high affinity to TCR over HLA-B*1502/peptide, which can tightly interact with the former rather than the latter. From the model, two hypotheses are proposed that can well explain most previous observations and are expected to guide next wet-lab experiments. This study could help to promote our understanding of the molecular mechanism and pathological implication underlying CBZ-induced SJS/TEN. FAU - Zhou, Peng AU - Zhou P AD - a Center of Bioinformatics (COBI), Key Laboratory for Neuroinformation of the Ministry of Education, Center for Information in BioMedicine, School of Life Science and Technology , University of Electronic Science and Technology of China (UESTC) , Chengdu 610054 , China. FAU - Zhang, Shilei AU - Zhang S AD - a Center of Bioinformatics (COBI), Key Laboratory for Neuroinformation of the Ministry of Education, Center for Information in BioMedicine, School of Life Science and Technology , University of Electronic Science and Technology of China (UESTC) , Chengdu 610054 , China. FAU - Wang, Yewang AU - Wang Y AD - a Center of Bioinformatics (COBI), Key Laboratory for Neuroinformation of the Ministry of Education, Center for Information in BioMedicine, School of Life Science and Technology , University of Electronic Science and Technology of China (UESTC) , Chengdu 610054 , China. FAU - Yang, Chao AU - Yang C AD - a Center of Bioinformatics (COBI), Key Laboratory for Neuroinformation of the Ministry of Education, Center for Information in BioMedicine, School of Life Science and Technology , University of Electronic Science and Technology of China (UESTC) , Chengdu 610054 , China. FAU - Huang, Jian AU - Huang J AD - a Center of Bioinformatics (COBI), Key Laboratory for Neuroinformation of the Ministry of Education, Center for Information in BioMedicine, School of Life Science and Technology , University of Electronic Science and Technology of China (UESTC) , Chengdu 610054 , China. LA - eng PT - Journal Article DEP - 20151214 PL - England TA - J Biomol Struct Dyn JT - Journal of biomolecular structure & dynamics JID - 8404176 RN - 0 (HLA-B Antigens) RN - 0 (Peptides) RN - 0 (Receptors, Antigen, T-Cell) RN - 33CM23913M (Carbamazepine) SB - IM MH - Binding Sites MH - Carbamazepine/adverse effects/*chemistry MH - HLA-B Antigens/*chemistry/genetics/metabolism MH - Humans MH - Models, Biological MH - *Models, Molecular MH - *Molecular Conformation MH - Mutation MH - Peptides/*chemistry/genetics/metabolism MH - Protein Binding MH - Receptors, Antigen, T-Cell/*chemistry/genetics/metabolism MH - Stevens-Johnson Syndrome/etiology MH - Structure-Activity Relationship OTO - NOTNLM OT - CBZ-induced SJS/TEN OT - HLA-B*1502 OT - HLA-drug association OT - T-cell receptor OT - adverse drug reaction OT - peptide EDAT- 2015/10/22 06:00 MHDA- 2017/02/25 06:00 CRDT- 2015/10/22 06:00 PHST- 2015/10/22 06:00 [entrez] PHST- 2015/10/22 06:00 [pubmed] PHST- 2017/02/25 06:00 [medline] AID - 10.1080/07391102.2015.1092476 [doi] PST - ppublish SO - J Biomol Struct Dyn. 2016 Aug;34(8):1806-17. doi: 10.1080/07391102.2015.1092476. Epub 2015 Dec 14.