Relaxed DM requirements during class II peptide loading and CD4+ T cell maturation in BALB/c mice.
Current ideas about DM actions have been strongly influenced by studies of mutant strains expressing the H-2(b) haplotype. To evaluate DM contributions to class II activities in BALB/c mice, we generated a novel mutation at the DMa locus via embryonic stem cell technology. Unlike long-lived A(b)/cla...
| Main Authors: | , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2001
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| _version_ | 1797053009837948928 |
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| author | Bikoff, E Wutz, G Kenty, G Koonce, C Robertson, E |
| author_facet | Bikoff, E Wutz, G Kenty, G Koonce, C Robertson, E |
| author_sort | Bikoff, E |
| collection | OXFORD |
| description | Current ideas about DM actions have been strongly influenced by studies of mutant strains expressing the H-2(b) haplotype. To evaluate DM contributions to class II activities in BALB/c mice, we generated a novel mutation at the DMa locus via embryonic stem cell technology. Unlike long-lived A(b)/class II-associated invariant chain-derived peptide (CLIP) complexes, mature A(d) and E(d) molecules are loosely occupied by class II-associated invariant chain-derived peptide and are SDS unstable. BALB/c DM mutants weakly express BP107 conformational epitopes and toxic shock syndrome toxin-1 superantigen-binding capabilities, consistent with partial occupancy by wild-type ligands. Near normal numbers of mature CD4(+) T cells fail to undergo superantigen-mediated negative selection, as judged by TCR Vbeta usage. Ag presentation assays reveal consistent differences for A(d)- and E(d)-restricted T cells. Indeed, the mutation leads to decreased peptide capture by A(d) molecules, and in striking contrast causes enhanced peptide loading by E(d) molecules. Thus, DM requirements differ for class II structural variants coexpressed under physiological conditions in the intact animal. |
| first_indexed | 2024-03-06T18:38:21Z |
| format | Journal article |
| id | oxford-uuid:0c10702c-4650-40e6-920f-71bd1a004a4e |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T18:38:21Z |
| publishDate | 2001 |
| record_format | dspace |
| spelling | oxford-uuid:0c10702c-4650-40e6-920f-71bd1a004a4e2022-03-26T09:32:51ZRelaxed DM requirements during class II peptide loading and CD4+ T cell maturation in BALB/c mice.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:0c10702c-4650-40e6-920f-71bd1a004a4eEnglishSymplectic Elements at Oxford2001Bikoff, EWutz, GKenty, GKoonce, CRobertson, ECurrent ideas about DM actions have been strongly influenced by studies of mutant strains expressing the H-2(b) haplotype. To evaluate DM contributions to class II activities in BALB/c mice, we generated a novel mutation at the DMa locus via embryonic stem cell technology. Unlike long-lived A(b)/class II-associated invariant chain-derived peptide (CLIP) complexes, mature A(d) and E(d) molecules are loosely occupied by class II-associated invariant chain-derived peptide and are SDS unstable. BALB/c DM mutants weakly express BP107 conformational epitopes and toxic shock syndrome toxin-1 superantigen-binding capabilities, consistent with partial occupancy by wild-type ligands. Near normal numbers of mature CD4(+) T cells fail to undergo superantigen-mediated negative selection, as judged by TCR Vbeta usage. Ag presentation assays reveal consistent differences for A(d)- and E(d)-restricted T cells. Indeed, the mutation leads to decreased peptide capture by A(d) molecules, and in striking contrast causes enhanced peptide loading by E(d) molecules. Thus, DM requirements differ for class II structural variants coexpressed under physiological conditions in the intact animal. |
| spellingShingle | Bikoff, E Wutz, G Kenty, G Koonce, C Robertson, E Relaxed DM requirements during class II peptide loading and CD4+ T cell maturation in BALB/c mice. |
| title | Relaxed DM requirements during class II peptide loading and CD4+ T cell maturation in BALB/c mice. |
| title_full | Relaxed DM requirements during class II peptide loading and CD4+ T cell maturation in BALB/c mice. |
| title_fullStr | Relaxed DM requirements during class II peptide loading and CD4+ T cell maturation in BALB/c mice. |
| title_full_unstemmed | Relaxed DM requirements during class II peptide loading and CD4+ T cell maturation in BALB/c mice. |
| title_short | Relaxed DM requirements during class II peptide loading and CD4+ T cell maturation in BALB/c mice. |
| title_sort | relaxed dm requirements during class ii peptide loading and cd4 t cell maturation in balb c mice |
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