Cysteine-rich secretory protein-1 （CRISP-1） is a glycoprotein secreted by the epididymal epithelium. It is a member of a large family of proteins characterized by two conserved domains and a set of 16 conserved cyst...Cysteine-rich secretory protein-1 （CRISP-1） is a glycoprotein secreted by the epididymal epithelium. It is a member of a large family of proteins characterized by two conserved domains and a set of 16 conserved cysteine residues. In mammals, CRISP-1 inhibits sperm-egg fusion and can suppress sperm capacitation. The molecular mechanism of action of the mammalian CRISP proteins remains unknown, but certain non-mammalian CRISP proteins can block ion channels. In the rat, CRISP-1 comprises two forms referred to as Proteins D and E. Recent work in our laboratory demonstrates that the D form of CRISP-1 associates transiently with the sperm surface, whereas the E form binds tightly. When the spermatozoa are washed, the E form of CRISP-1 persists on the sperm surface after all D form has dissociated. Cross-linking studies demonstrate different protein-protein interaction patterns for D and E, although no binding partners for either protein have yet been identified. Mass spectrometric analyses revealed a potential post-translational modification on the E form that is not present on the D form. This is the only discernable difference between Proteins D and E, and presumably is responsible for the difference in behavior of these two forms of rat CRISP- 1. These studies demonstrate that the more abundant D form interacts with spermatozoa transiently, possibly with a specific receptor on the sperm surface, consistent with a capacitation-suppressing function during sperm transit and storage in the epididymis, and also confirm a tightly bound population of the E form that could act in the female reproductive tract. （Asian J Androl 2007 July; 9： 508-514）展开更多
A series of N1-substituted-3-aryl-4-alkyl-4, 5-dihydro-1H-1-pyrazolethiocarboxamide were prepared from the Mannich bases of aryl ketones in good yields. Some derivatives were found to be active against the cysteine p...A series of N1-substituted-3-aryl-4-alkyl-4, 5-dihydro-1H-1-pyrazolethiocarboxamide were prepared from the Mannich bases of aryl ketones in good yields. Some derivatives were found to be active against the cysteine protease of T.cruzi..展开更多
目的:分析外周血核苷酸结合寡聚化结构域样受体蛋白3(nucleotide binding oligomerization domain like receptor protein 3,NLRP3)-半胱氨酸蛋白酶1(cysteine-aspartic acid protease 1,Caspase-1)-白细胞介素(interleukin,IL)-1β信...目的:分析外周血核苷酸结合寡聚化结构域样受体蛋白3(nucleotide binding oligomerization domain like receptor protein 3,NLRP3)-半胱氨酸蛋白酶1(cysteine-aspartic acid protease 1,Caspase-1)-白细胞介素(interleukin,IL)-1β信号轴与肺癌的相关性。方法:选取2021年6月—2023年8月江苏省连云港市赣榆区人民医院收治的肺癌住院患者72例初诊患者(肺癌组)和72例健康体检者(健康对照组)。比较两组外周血单核细胞、NLRP3、Caspase-1、IL-1β水平及肺功能[1秒用力呼气量(forced expiratory volume in one second,FEV_(1))、用力肺活量(forced vital capacity,FVC)、FEV_(1)/FVC],并分析肺癌组外周血中NLRP3、IL-1β水平与FEV_(1)、FVC、FEV_(1)/FVC的相关性。结果:肺癌组患者FEV_(1)、FVC、FEV_(1)/FVC水平均显著低于健康对照组,差异有统计学意义(P均<0.05);外周血中Nlrp3、Caspase-1、Il-1βmRNA相对表达水平和Caspase-1和IL-1β分泌水平均高于健康对照组,差异有统计学意义(P均<0.05);Spearman相关分析显示,肺癌组患者外周血单核细胞Nlrp3基因mRNA相对表达量与FEV_(1)、FEV_(1)/FVC水平呈负相关(P<0.05);而外周血IL-1β分泌水平与FEV_(1)/FVC水平呈正相关(P<0.05)。结论:外周血单核细胞中NLRP3 mRNA相对表达水平及外周血IL-1β分泌水平与肺癌进展呈负相关,可反映肺癌进展程度,对肺癌的筛查和诊断具有潜在的参考价值。展开更多
Geometry optimization at the B3LYP/6-31＋＋G＊ level of theory has been undertaken on clusters containing L-Met （L-methionine） or L-Cys （L-cysteine） surrounded by eight water molecules. The comparison of the struc...Geometry optimization at the B3LYP/6-31＋＋G＊ level of theory has been undertaken on clusters containing L-Met （L-methionine） or L-Cys （L-cysteine） surrounded by eight water molecules. The comparison of the structural parameters of L-Met and L-Cys with X-ray experimental values is in good agreement within 4.8%. This result shows that the privileged positions of water molecules and the possible hydrogen bonding network formed around the backbone of both AAs （amino acids） are adequate. Subsequent calculations of the harmonic vibrational modes followed by a post-processing treatment enable us to assign the vibrational modes of L-Met and L-Cys surrounded explicitly by eight water molecules. The frequencies of the assigned modes are in good agreement with available IR （infra red） and Raman values within 5%.展开更多
文摘Cysteine-rich secretory protein-1 （CRISP-1） is a glycoprotein secreted by the epididymal epithelium. It is a member of a large family of proteins characterized by two conserved domains and a set of 16 conserved cysteine residues. In mammals, CRISP-1 inhibits sperm-egg fusion and can suppress sperm capacitation. The molecular mechanism of action of the mammalian CRISP proteins remains unknown, but certain non-mammalian CRISP proteins can block ion channels. In the rat, CRISP-1 comprises two forms referred to as Proteins D and E. Recent work in our laboratory demonstrates that the D form of CRISP-1 associates transiently with the sperm surface, whereas the E form binds tightly. When the spermatozoa are washed, the E form of CRISP-1 persists on the sperm surface after all D form has dissociated. Cross-linking studies demonstrate different protein-protein interaction patterns for D and E, although no binding partners for either protein have yet been identified. Mass spectrometric analyses revealed a potential post-translational modification on the E form that is not present on the D form. This is the only discernable difference between Proteins D and E, and presumably is responsible for the difference in behavior of these two forms of rat CRISP- 1. These studies demonstrate that the more abundant D form interacts with spermatozoa transiently, possibly with a specific receptor on the sperm surface, consistent with a capacitation-suppressing function during sperm transit and storage in the epididymis, and also confirm a tightly bound population of the E form that could act in the female reproductive tract. （Asian J Androl 2007 July; 9： 508-514）
文摘A series of N1-substituted-3-aryl-4-alkyl-4, 5-dihydro-1H-1-pyrazolethiocarboxamide were prepared from the Mannich bases of aryl ketones in good yields. Some derivatives were found to be active against the cysteine protease of T.cruzi..
文摘目的:分析外周血核苷酸结合寡聚化结构域样受体蛋白3(nucleotide binding oligomerization domain like receptor protein 3,NLRP3)-半胱氨酸蛋白酶1(cysteine-aspartic acid protease 1,Caspase-1)-白细胞介素(interleukin,IL)-1β信号轴与肺癌的相关性。方法:选取2021年6月—2023年8月江苏省连云港市赣榆区人民医院收治的肺癌住院患者72例初诊患者(肺癌组)和72例健康体检者(健康对照组)。比较两组外周血单核细胞、NLRP3、Caspase-1、IL-1β水平及肺功能[1秒用力呼气量(forced expiratory volume in one second,FEV_(1))、用力肺活量(forced vital capacity,FVC)、FEV_(1)/FVC],并分析肺癌组外周血中NLRP3、IL-1β水平与FEV_(1)、FVC、FEV_(1)/FVC的相关性。结果:肺癌组患者FEV_(1)、FVC、FEV_(1)/FVC水平均显著低于健康对照组,差异有统计学意义(P均<0.05);外周血中Nlrp3、Caspase-1、Il-1βmRNA相对表达水平和Caspase-1和IL-1β分泌水平均高于健康对照组,差异有统计学意义(P均<0.05);Spearman相关分析显示,肺癌组患者外周血单核细胞Nlrp3基因mRNA相对表达量与FEV_(1)、FEV_(1)/FVC水平呈负相关(P<0.05);而外周血IL-1β分泌水平与FEV_(1)/FVC水平呈正相关(P<0.05)。结论:外周血单核细胞中NLRP3 mRNA相对表达水平及外周血IL-1β分泌水平与肺癌进展呈负相关,可反映肺癌进展程度,对肺癌的筛查和诊断具有潜在的参考价值。
文摘Geometry optimization at the B3LYP/6-31＋＋G＊ level of theory has been undertaken on clusters containing L-Met （L-methionine） or L-Cys （L-cysteine） surrounded by eight water molecules. The comparison of the structural parameters of L-Met and L-Cys with X-ray experimental values is in good agreement within 4.8%. This result shows that the privileged positions of water molecules and the possible hydrogen bonding network formed around the backbone of both AAs （amino acids） are adequate. Subsequent calculations of the harmonic vibrational modes followed by a post-processing treatment enable us to assign the vibrational modes of L-Met and L-Cys surrounded explicitly by eight water molecules. The frequencies of the assigned modes are in good agreement with available IR （infra red） and Raman values within 5%.
