Cutting edge: the HLA-A*0101-restricted HY minor histocompatibility antigen originates from DFFRY and contains a cysteinylated cysteine residue as identified by a novel mass spectrometric technique.

Cutting edge: the HLA-A*0101-restricted HY minor histocompatibility antigen originates from DFFRY and contains a cysteinylated cysteine residue as identified by a novel mass spectrometric technique.
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最前沿:HLA-A*0101 限制性 HY 次要组织相容性抗原源自 DFFRY,并含有通过新型质谱技术鉴定的半胱氨酸化半胱氨酸残基。

DOI:
10.4049/jimmunol.163.12.6360
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发表时间:
1999
影响因子:
4.4
通讯作者:
V. Engelhard
V. Engelhard
中科院分区:
医学2区
文献类型:
--
作者:
Richard A. Pierce;Erin D. Field;J. D. den Haan;J. Caldwell;Forest M. White;J. Marto;Wei Wang;Leslie M. Frost;E. Blokland;C. Reinhardus;J. Shabanowitz;D. F. Hunt;E. Goulmy;V. Engelhard

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在这份报告中,我们描述了使用新的质谱仪器,以确定一个男性特异性的轻微组织相容性抗原限制HLA-A*0101(A1-HY)。该Ag具有序列IVDC*LTEMY,其中C* 表示与第二个半胱氨酸残基键合的半胱氨酸二硫键。核心肽序列存在于DFFRY的蛋白质产物中,DFFRY是一种Y染色体基因,先前未被鉴定为HY Ag的来源。该肽的男性特异性形式与其X染色体对应物的不同之处在于C* 残基被丝氨酸取代。两种肽均以每个细胞30个或更少拷贝在细胞表面上表达。然而,A1-HY特异性CTL识别DFFRY衍生肽的剂量比女性同源物低1500倍。因此,这些研究已经确定了一个新的HY表位的来源,并提供了额外的信息,I类相关肽的翻译后修饰对T细胞识别的影响。
In this report, we describe the use of novel mass spectrometry instrumentation to identify a male-specific minor histocompatibility Ag restricted by HLA-A*0101 (A1-HY). This Ag has the sequence IVDC*LTEMY, where C* represents a cysteine disulfide bonded to a second cysteine residue. The core peptide sequence is found in the protein product of DFFRY, a Y chromosome gene not previously identified as the source of an HY Ag. The male-specific form of the peptide differs from its X chromosomal counterpart by the substitution of serine for the C* residue. Both peptides are expressed on the cell surface at 30 or fewer copies per cell. However, A1-HY-specific CTL recognize the DFFRY-derived peptide at a 1500-fold lower dose than the female homologue. Thus, these studies have identified a new source of HY epitopes and provide additional information about the influence of posttranslational modifications of class I-associated peptides on T cell recognition.
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