Cárdenas C, Ortiz M, Balbín A, Villaveces JL, Patarroyo ME. Allele effects in MHC–peptide interactions: A theoretical analysis of HLA-DRβ1*0101-HA and HLA-DRβ1*0401-HA complexes.
Biochem Biophys Res Commun 2005;
330:1162-7. [PMID:
15823565 DOI:
10.1016/j.bbrc.2005.03.102]
[Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2005] [Indexed: 10/25/2022]
Abstract
HLA-DRbeta1*0101-HA and HLA-DRbeta1*0401-HA complexes are studied and compared by means of their computationally derived multipolar moments and electrostatic potentials. Changes in electrostatic potential are associated with definite pocket interaction profiles. Thus, Pocket 1 projects itself as an anchoring pocket for both complexes, in accordance with experimental results. While Pocket 4 has an anchoring profile in the HLA-DRbeta1*0101 allele, it presents itself as modulating pocket-peptide interactions in HLA-DRbeta1*0401. Pockets 6 and 7 both strongly contribute to allele specificity, with Pocket 7 being very important for HLA-DRbeta1*0401-HA. Pocket 9 acts as a "double purpose" interaction site for both alleles. It both projects itself as an anchoring pocket as well as modulating pocket-peptide interactions.
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