Objective In kinesin-3,the neck coil correlates with the following segments to form an extended neck that contains a characteristic hinge diverse from a proline in KIF13B to a long flexible linker in KIF1A.The functio...Objective In kinesin-3,the neck coil correlates with the following segments to form an extended neck that contains a characteristic hinge diverse from a proline in KIF13B to a long flexible linker in KIF1A.The function of this neck hinge for controlling processive movement,however,remains unclear.Methods We made a series of modifications to the neck hinges of KIF13B and KIF1A and tested their movement using a single-molecule motility assay.Results In KIF13B,the insertion of flexible residues before or after the proline differentially impacts the processivity or velocity,while the removal of this proline increases the both.In KIF1A,the deletion of entire flexible neck hinge merely enhances the processivity.The engineering of these hinge-truncated necks of kinesin-3 into kinesin-1 similarly boosts the processive movement of kinesin-1.Conclusion The neck hinge in kinesin-3 controls its processive movement and proper modifications tune the motor motility,which provides a novel strategy to reshape the processive movement of kinesin motors.展开更多
Cardiovascular diseases are a group of disorders of the heart and blood vessels,primarily including coronary heart disease,stroke,and other diseases.It is the world’s leading cause of death,and its incidence is incre...Cardiovascular diseases are a group of disorders of the heart and blood vessels,primarily including coronary heart disease,stroke,and other diseases.It is the world’s leading cause of death,and its incidence is increasing yearly.Hypertension is a major risk factor for cardiovascular disease.Wnt signaling comprises a series of highly conservative cascading events controlling fundamental biological processes.Wnt signaling pathways include the canonical Wnt pathway(or Wnt/β-catenin pathway),the non canonical planar cell-polarity pathway,and the non-canonical calcium-dependent pathways.Abnormal Wnt signaling promotes cell proliferation and differentiation,cardiac malformations,various malignancies,so drugs targeting Wnt signaling play a great therapeutic potential.Wnt/β-catenin pathway is involved in the occurrence and development of cardiovascular diseases such as atherosclerosis and stroke by regulating cell proliferation,migration,apoptosis,blood-brain barrier permeability,inflammation,oxidative stress,and immune response.Based on the latest research progress,this review summarizes the role of Wnt/β-catenin signaling in cardiovascular diseases,in order to provide new ideas for the prevention and treatment of cardiovascular diseases.展开更多
采用高效液相色谱-光化学柱后在线衍生-荧光检测法检测鸡肉中16种磺胺类药物残留量。鸡肉样品经过乙腈提取并脱脂净化,色谱柱分离,光化学在线衍生并直接用荧光检测器检测。流动相为0.3%的冰乙酸和甲醇溶液梯度洗脱,流速0.7 m L/min、柱...采用高效液相色谱-光化学柱后在线衍生-荧光检测法检测鸡肉中16种磺胺类药物残留量。鸡肉样品经过乙腈提取并脱脂净化,色谱柱分离,光化学在线衍生并直接用荧光检测器检测。流动相为0.3%的冰乙酸和甲醇溶液梯度洗脱,流速0.7 m L/min、柱温36℃,激发波长320 nm、发射波长450 nm,16种磺胺类药物得到良好分离。16种磺胺药物在0.13~67.89μg/m L质量度范围内,线性良好（R≥0.994 0）,回收率在61.2%~106.6%之间,相对标准偏差为0.3%~13.9%,检出限为1.0~67.4μg/kg。该方法灵敏、准确、快速,可满足鸡肉中磺胺类残留的检测。展开更多
文摘Objective In kinesin-3,the neck coil correlates with the following segments to form an extended neck that contains a characteristic hinge diverse from a proline in KIF13B to a long flexible linker in KIF1A.The function of this neck hinge for controlling processive movement,however,remains unclear.Methods We made a series of modifications to the neck hinges of KIF13B and KIF1A and tested their movement using a single-molecule motility assay.Results In KIF13B,the insertion of flexible residues before or after the proline differentially impacts the processivity or velocity,while the removal of this proline increases the both.In KIF1A,the deletion of entire flexible neck hinge merely enhances the processivity.The engineering of these hinge-truncated necks of kinesin-3 into kinesin-1 similarly boosts the processive movement of kinesin-1.Conclusion The neck hinge in kinesin-3 controls its processive movement and proper modifications tune the motor motility,which provides a novel strategy to reshape the processive movement of kinesin motors.
文摘Cardiovascular diseases are a group of disorders of the heart and blood vessels,primarily including coronary heart disease,stroke,and other diseases.It is the world’s leading cause of death,and its incidence is increasing yearly.Hypertension is a major risk factor for cardiovascular disease.Wnt signaling comprises a series of highly conservative cascading events controlling fundamental biological processes.Wnt signaling pathways include the canonical Wnt pathway(or Wnt/β-catenin pathway),the non canonical planar cell-polarity pathway,and the non-canonical calcium-dependent pathways.Abnormal Wnt signaling promotes cell proliferation and differentiation,cardiac malformations,various malignancies,so drugs targeting Wnt signaling play a great therapeutic potential.Wnt/β-catenin pathway is involved in the occurrence and development of cardiovascular diseases such as atherosclerosis and stroke by regulating cell proliferation,migration,apoptosis,blood-brain barrier permeability,inflammation,oxidative stress,and immune response.Based on the latest research progress,this review summarizes the role of Wnt/β-catenin signaling in cardiovascular diseases,in order to provide new ideas for the prevention and treatment of cardiovascular diseases.
