结晶
钴
人类白细胞抗原
化学
主要组织相容性复合体
化学工程
材料科学
无机化学
免疫学
生物
生物化学
抗原
有机化学
工程类
基因
作者
Craig S. Clements,Lars Kjer‐Nielsen,Lyudmila Kostenko,James McCluskey,Jamie Rossjohn
出处
期刊:Acta crystallographica
[International Union of Crystallography]
日期:2005-12-16
卷期号:62 (1): 70-73
被引量:9
标识
DOI:10.1107/s1744309105041473
摘要
HLA-G is a nonclassical class I major histocompatibility complex (MHC) molecule that is primarily expressed at the foetal-maternal interface. Although the role of HLA-G has not been fully elucidated, current evidence suggests it protects the foetus from the maternal immune response. In this report, HLA-G (44 kDa) is characterized by expression in Escherichia coli. The inclusion bodies were refolded in complex with a peptide derived from histone H2A (RIIPRHLQL), purified and subsequently crystallized. Correct refolding was determined using two conformation-dependent antibodies. Cobalt ions were shown to be an essential ingredient for obtaining diffraction-quality crystals. The crystals, which diffracted to 1.9 A resolution, belonged to space group P3(2)2(1), with unit-cell parameters a = b = 77.15, c = 151.72 A.
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