PMID- 24475163 OWN - NLM STAT- MEDLINE DCOM- 20141112 LR - 20240320 IS - 1932-6203 (Electronic) IS - 1932-6203 (Linking) VI - 9 IP - 1 DP - 2014 TI - Clustering HLA class I superfamilies using structural interaction patterns. PG - e86655 LID - 10.1371/journal.pone.0086655 [doi] LID - e86655 AB - Human leukocyte antigen (HLA) class I molecules are critical components of the cell-mediated immune system that bind and present intracellular antigenic peptides to CD8(+) T cell receptors. To understand the interaction mechanism underlying human leukocyte antigen (HLA) class I specificity in detail, we studied the structural interaction characteristics of 16,393 nonameric peptides binding to 58 HLA-A and -B molecules. Our analysis showed for the first time that HLA-peptide intermolecular bonding patterns vary among different alleles and may be grouped in a superfamily dependent manner. Through the use of these HLA class I 'fingerprints', a high resolution HLA class I superfamily classification schema was developed. This classification is capable of separating HLA alleles into well resolved, non-overlapping clusters, which is consistent with known HLA superfamily definitions. Such structural interaction approach serves as an excellent alternative to the traditional methods of HLA superfamily definitions that use peptide binding motifs or receptor information, and will help identify appropriate antigens suitable for broad-based subunit vaccine design. FAU - Harjanto, Sumitro AU - Harjanto S AD - Duke-National University of Singapore Graduate Medical School, Singapore, Singapore. FAU - Ng, Lisa F P AU - Ng LF AD - Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore ; Singapore Immunology Network, Agency for Science, Technology and Research, Singapore, Singapore. FAU - Tong, Joo Chuan AU - Tong JC AD - Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore ; Institute of High Performance Computing, Agency for Science, Technology and Research, Singapore, Singapore. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20140127 PL - United States TA - PLoS One JT - PloS one JID - 101285081 RN - 0 (Epitopes, T-Lymphocyte) RN - 0 (HLA-A Antigens) RN - 0 (HLA-B Antigens) RN - 0 (Peptides) SB - IM MH - Amino Acid Sequence MH - Cluster Analysis MH - Computational Biology MH - Epitopes, T-Lymphocyte/metabolism MH - HLA-A Antigens/*classification/genetics/*metabolism MH - HLA-B Antigens/*classification/genetics/*metabolism MH - Humans MH - Molecular Sequence Data MH - Multigene Family/*genetics MH - Peptides/*metabolism MH - Protein Binding PMC - PMC3903569 COIS- Competing Interests: The authors have declared that no competing interests exist. EDAT- 2014/01/30 06:00 MHDA- 2014/11/13 06:00 PMCR- 2014/01/27 CRDT- 2014/01/30 06:00 PHST- 2013/09/01 00:00 [received] PHST- 2013/12/15 00:00 [accepted] PHST- 2014/01/30 06:00 [entrez] PHST- 2014/01/30 06:00 [pubmed] PHST- 2014/11/13 06:00 [medline] PHST- 2014/01/27 00:00 [pmc-release] AID - PONE-D-13-35932 [pii] AID - 10.1371/journal.pone.0086655 [doi] PST - epublish SO - PLoS One. 2014 Jan 27;9(1):e86655. doi: 10.1371/journal.pone.0086655. eCollection 2014.