Wang Z, Chen R, Tariq M, Jiang B, Chen Z, Xia C. Complex assembly, crystallization and preliminary X-ray crystallographic analysis of the bovine CD8αα-BoLA-2*02201 complex.
ACTA CRYSTALLOGRAPHICA SECTION F-STRUCTURAL BIOLOGY COMMUNICATIONS 2014;
70:742-6. [PMID:
24915083 DOI:
10.1107/s2053230x14008838]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Accepted: 04/17/2014] [Indexed: 11/10/2022]
Abstract
In order to clarify the structural characteristics of the bovine MHC class I molecule (BoLA-I) complexed with CD8αα (CD8αα-BoLA-I), bovine CD8αα, BoLA-I (BoLA-2*02201) and β2m were expressed and purified, and were then assembled with a peptide derived from Foot-and-mouth disease virus (FMDV-VP1YY9) and crystallized. The crystal diffracted to 1.7 Å resolution and belonged to space group P21, with unit-cell parameters a=53.9, b=103.8, c=61.8 Å, α=γ=90, β=96°. The asymmetric unit contained one complex, with a Matthews coefficient of 2.41 Å3 Da(-1) and a solvent content of 48.9%. The rotation-function Z-score and translation-function Z-score for molecular replacement were 3.4 and 8.9, respectively. In addition, SDS-PAGE analysis of CD8αα-BoLA-I crystals showed three bands corresponding to the molecular weights of BoLA-I heavy chain, β2m and CD8α. The structure of the CD8αα-BoLA-I complex should be helpful in obtaining insight into the interaction between bovine CD8αα and MHC class I molecules. Structure determination of BoLA-2*02201-FMDV-VP1YY9 will be useful in the design of vaccines for foot-and-mouth disease.
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