1
|
Sarri CA, Giannoulis T, Moutou KA, Mamuris Z. HLA class II peptide-binding-region analysis reveals funneling of polymorphism in action. Immunol Lett 2021; 238:75-95. [PMID: 34329645 DOI: 10.1016/j.imlet.2021.07.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 07/05/2021] [Accepted: 07/17/2021] [Indexed: 01/24/2023]
Abstract
BACKGROUND HLA-class II proteins hold important roles in key physiological processes. The purpose of this study was to compile all class II alleles reported in human population and investigate patterns in pocket variants and their combinations, focusing on the peptide-binding region (PBR). METHODS For this purpose, all protein sequences of DPA1, DQA1, DPB1, DQB1 and DRB1 were selected and filtered, in order to have full PBR sequences. Proportional representation was used for pocket variants while population data were also used. RESULTS All pocket variants and PBR sequences were retrieved and analyzed based on the preference of amino acids and their properties in all pocket positions. The observed number of pocket variants combinations was much lower than the possible inferred, suggesting that PBR formation is under strict funneling. Also, although class II proteins are very polymorphic, in the majority of the reported alleles in all populations, a significantly less polymorphic pocket core was found. CONCLUSIONS Pocket variability of five HLA class II proteins was studied revealing favorable properties of each protein. The actual PBR sequences of HLA class II proteins appear to be governed by restrictions that lead to the establishment of only a fraction of the possible combinations and the polymorphism recorded is the result of intense funneling based on function.
Collapse
Affiliation(s)
- Constantina A Sarri
- Department of Biochemistry and Biotechnology, Laboratory of Genetics, Comparative and Evolutionary Biology, University of Thessaly, Viopolis, Mezourlo, 41500, Larisa, Greece
| | - Themistoklis Giannoulis
- Department of Biochemistry and Biotechnology, Laboratory of Genetics, Comparative and Evolutionary Biology, University of Thessaly, Viopolis, Mezourlo, 41500, Larisa, Greece; Department of Animal Science, University of Thessaly, Trikallon 224, 43100 Karditsa, Greece
| | - Katerina A Moutou
- Department of Biochemistry and Biotechnology, Laboratory of Genetics, Comparative and Evolutionary Biology, University of Thessaly, Viopolis, Mezourlo, 41500, Larisa, Greece
| | - Zissis Mamuris
- Department of Biochemistry and Biotechnology, Laboratory of Genetics, Comparative and Evolutionary Biology, University of Thessaly, Viopolis, Mezourlo, 41500, Larisa, Greece.
| |
Collapse
|
2
|
Strategies and technical challenges in allele level Class II typing in 2578 bone marrow transplantation donor-recipient pairs. Hum Immunol 2008; 69:227-34. [PMID: 18486756 DOI: 10.1016/j.humimm.2008.03.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2007] [Revised: 03/15/2008] [Accepted: 03/20/2008] [Indexed: 11/22/2022]
Abstract
Human leukocyte antigen typing of 2578 donor-recipient pairs whose transplantation was facilitated by the National Marrow Donor Program allowed for an in-depth analysis of the accuracy of high-volume allele level testing data. The methods employed provided allele level typing at DRB1/3/5, DQA1, DQB1, DPA1, and DPB1 using sequence-specific oligonucleotide probe hybridization (SSOPH), polymerase chain reaction (PCR) restriction fragment length polymorphism analysis, sequence specific PCR, and direct sequence-based typing (SBT). Each typing was independently tested by two laboratories in Phase 1, and in subsequent phases targeted samples were typed in duplicate by SBT to monitor typing quality. Comparison with prior transplant center typing was also evaluated. SSOPH detected discrepancies ranged from 0.6% at DPB1 to 5.1% at DQB1 in Phase 1. The majority of discrepancies, 62%, resulted from human error such as sample handling, result interpretation, or clerical errors. Alleles that are frequently discrepant have been identified in this predominantly white population.
Collapse
|
3
|
Bengtsson M, Danielsson F, Jansson IE, Johansson U. Identification of a new HLA-DPB1 allele,HLA-DPB1*9001. TISSUE ANTIGENS 2002; 59:344-6. [PMID: 12135440 DOI: 10.1034/j.1399-0039.2002.590419.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
During routine typing of a potential bone marrow donor, a new HLA DPB1 allele was identified. The new allele, officially named HLA DPB1*9001, differs from HLA DPB1*01011 in the second hypervariable region, where a single nucleotide substitution in position 191 changes the codon 35 from TAC to TTC with a predicted amino acid change from Tyr to Phe.
Collapse
Affiliation(s)
- M Bengtsson
- Section of Clinical Immunology, Department of Oncology, Radiology and Clinical Immunology, Rudbeck Laboratory, University Hospital, Uppsala, Sweden.
| | | | | | | |
Collapse
|
4
|
Bengtsson M. DPB1*8601, a previously unrecognized DPB1 variant in the Caucasoid population. TISSUE ANTIGENS 2001; 57:536-9. [PMID: 11556983 DOI: 10.1034/j.1399-0039.2001.057006536.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A new, previously unrecognized DPB1* allele, DPB1*8601, was found in a Swedish family. The new allele was carried on the common North European haplotype HLA A1-B8-DR3. Both individuals carrying the new allele were initially typed as clear DPB1*4601,*6601 but after family studies and further typing with allele-specific primers it was concluded that a new allele was present together with the common DPB1*0401. The new allele was investigated by direct sequencing of exon 2 in both forward and reverse directions employing intron primers combined with either an allele-specific sense or anti-sense biotinylated primer for bi-directional sequencing. The new allele is identical to DPB1*1701 in the five first variable regions. In the sixth region, however, DPB1*8601 carries the GGPM motif shared by several common alleles such as DPB1*0201 and 0401and 0402.
Collapse
Affiliation(s)
- M Bengtsson
- Section of Clinical Immunology, Department of Oncology, Radiology and Clinical Immunology, Rudbeck Laboratory, University Hospital, Uppsala, Sweden.
| |
Collapse
|
5
|
Hurley CK, Baxter-Lowe LA, Begovich AB, Fernandez-Vina M, Noreen H, Schmeckpeper B, Awdeh Z, Chopek M, Salazar M, Williams TM, Yunis EJ, Kitajima D, Shipp K, Splett J, Winden T, Kollman C, Johnson D, Ng J, Hartzman RJ, Hegland J. The extent of HLA class II allele level disparity in unrelated bone marrow transplantation: analysis of 1259 National Marrow Donor Program donor-recipient pairs. Bone Marrow Transplant 2000; 25:385-93. [PMID: 10723581 DOI: 10.1038/sj.bmt.1702161] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A comprehensive analysis of the HLA-D region loci, DRB1, DRB3, DRB5, DQA1, DQB1, DPA1 and DPB1, was performed to determine allelic diversity and underlying HLA disparity in 1259 bone marrow recipients and their unrelated donors transplanted through the National Marrow Donor Program. Although 43.0% of DRB1 alleles known to exist at the beginning of the study were found in this predominantly Caucasian transplant population, a few alleles predominated at each locus. In recipients, 67.1% of DRB1 alleles identified were one or two of six common DRB1 alleles. Only 118 (9.4%) donor-recipient pairs were matched for all alleles of DRB1, DQA1, DQB1, DPA1 and DPB1. While 79.4% of the pairs were matched for DRB1, only 13.2% were matched for DPB1 alleles. Almost 66% of pairs differed by more than one allele mismatch and 59.0% differed at more than one HLA-D locus. DQB1 was matched in 85.9% of DRB1-matched pairs. In contrast, only 13.9% of the pairs matched for DRB1, DQA1 and DQB1 were also matched for DPA1 and DPB1. This database, highlighting the underlying HLA disparity within the pairs, forms the foundation of an ongoing study to establish the relationship between HLA matching and successful outcome in unrelated allogeneic stem cell transplant.
Collapse
Affiliation(s)
- C K Hurley
- Department of Microbiology and Immunology, Georgetown University, Washington, DC, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
6
|
Steiner LL, Wu J, Noreen HJ, Moehlenkamp C, Cavalli A, Davidson M, Johnson S, Winden T, Segall M, Begovich AB, Williams TM. Four new DP alleles identified in a study of 500 unrelated bone marrow donor-recipient pairs. TISSUE ANTIGENS 1999; 53:201-6. [PMID: 10090623 DOI: 10.1034/j.1399-0039.1999.530213.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
HLA-DP genotyping of 500 donor recipient pairs in a retrospective analysis sponsored by the National Marrow Donor Program (NMDP) identified four new DP alleles, two DPB1 and two DPA1. DNA sequencing confirmed that DPB1*8001 and *8101, each found in a single individual, are novel combinations of previously described sequence motifs in the six variable regions of DPB1. DPA1*02014, found in two individuals, is identical to DPA1*02011 except for a novel silent substitution, a G to A transition at the third position of codon 14. DPA1*01032, found in one individual, is identical to DPB1*01031 except for a silent G to A transition at the third position of codon 20. The identification of these novel alleles brings the total number of reported DPB1 alleles to 85 and DPA1 alleles to 15.
Collapse
Affiliation(s)
- L L Steiner
- Department of Human Genetics, Roche Molecular Systems, Alameda, California 94501, USA
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
7
|
Varney MD, Tait BD. A novel strategy for unambiguous DPB1 typing. Int J Immunogenet 1998. [DOI: 10.1111/j.1744-313x.1998.tb01155.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
8
|
Poulton K, Kennedy L, Ross J, Thomson W, Mbanya J, Ollier W. A study of HLA-DPB1 phenotypes reveals DPB1*6301 in a rural population from Cameroon. Int J Immunogenet 1998. [DOI: 10.1111/j.1744-313x.1998.tb01156.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
9
|
Steiner LL, McCurdy DK, Cavalli A, Moonsamy PV, Begovich AB. Two new DPB1 alleles identified in a study of the genetics of susceptibility to pauciarticular juvenile rheumatoid arthritis. TISSUE ANTIGENS 1997; 49:262-6. [PMID: 9098934 DOI: 10.1111/j.1399-0039.1997.tb02748.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- L L Steiner
- Department of Human Genetics, Roche Molecular Systems, Alameda, California, USA
| | | | | | | | | |
Collapse
|
10
|
Bodmer JG, Marsh SG, Albert ED, Bodmer WF, Bontrop RE, Charron D, Dupont B, Erlich HA, Fauchet R, Mach B, Mayr WR, Parham P, Sasazuki T, Schreuder GM, Strominger JL, Svejgaard A, Terasaki PI. Nomenclature for factors of the HLA System, 1996. Hum Immunol 1997; 53:98-128. [PMID: 9127153 DOI: 10.1016/s0198-8859(97)00031-1] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- J G Bodmer
- ICRF Cancer and Immunogenetics Laboratory, Institute of Molecular Medicine, John Radcliffe Hospital, Headington, Oxford, United Kingdom
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
11
|
Bodmer JG, Marsh SG, Albert ED, Bodmer WF, Bontrop RE, Charron D, Dupont B, Erlich HA, Fauchet R, Mach B, Mayr WR, Parham P, Sasazuki T, Schreuder GM, Strominger JL, Svejgaard A, Terasaki PI. Nomenclature for factors of the HLA system, 1996. TISSUE ANTIGENS 1997; 49:297-321. [PMID: 9098945 DOI: 10.1111/j.1399-0039.1997.tb02759.x] [Citation(s) in RCA: 257] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- J G Bodmer
- ICRF Cancer and Immunogenetics Laboratory, Institute of Molecular Medicine, John Radcliffe Hospital, Oxford, United Kingdom.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
12
|
|