The structural basis for histone recognition by the histone chaperone nuclear autoantigenic sperm protein(NASP)remains largely unclear.Here,we showed that Arabidopsis thaliana AtNASP is a monomer and displays robust n...The structural basis for histone recognition by the histone chaperone nuclear autoantigenic sperm protein(NASP)remains largely unclear.Here,we showed that Arabidopsis thaliana AtNASP is a monomer and displays robust nucleosome assembly activity in vitro.Examining the structure of AtNASP complexed with a histone H3α3 peptide revealed a binding mode that is conserved in human NASP.AtNASP recognizes the H3 N-terminal region distinct from human NASP.Moreover,AtNASP forms a co-chaperone complex with ANTI-SILENCING FUNCTION 1 ASF1 by binding to the H3 Nterminal region.Therefore,we deciphered the structure of AtNASP and the basis of the AtNASP-H3 interaction.展开更多
利用cDNA末端快速扩增技术克隆出凡纳滨对虾(Litopenaeus vannamei)核自身抗原精子蛋白(NASP)基因,NASP基因c DNA全长2258 bp,其中包括92 bp 5′端非编码区,147 bp 3′端非编码区及2019 bp开放阅读区,编码673个氨基酸,预测分子量为74.18...利用cDNA末端快速扩增技术克隆出凡纳滨对虾(Litopenaeus vannamei)核自身抗原精子蛋白(NASP)基因,NASP基因c DNA全长2258 bp,其中包括92 bp 5′端非编码区,147 bp 3′端非编码区及2019 bp开放阅读区,编码673个氨基酸,预测分子量为74.18 k D。该序列已提交至Gen Bank,序列号为KT274811。在NCBI上进行序列比对后发现,其与斑节对虾(Penaeus monodon)NASP序列相似性最高,为90%。采用荧光定量PCR方法测定了不同发育时期卵巢与肝胰腺中NASP m RNA相对表达水平,结果表明,NASP在卵巢中的表达量高于肝胰腺中的表达量,且在Ⅱ期表达量最高,Ⅲ期表达量最低。此外,通过构建系统进化树比较了凡纳滨对虾NASP与其他物种间的遗传距离。实验结果为进一步研究该基因在凡纳滨对虾卵巢发育中的作用提供了依据。展开更多
基金the National Key R&D Program of China(2018YFC1004500)the Natural Science Foundation of Guangdong Province(2022A1515010501)+4 种基金the Chinese National Natural Science Foundation(32171206 and 31800619)the Shenzhen Science and Technology Program(KQTD20190929173906742)Key Laboratory of Molecular Design for Plant Cel Factory of Guangdong Higher Education Institutes(2019KSYS006)the Shenzhen Government‘Peacock Plan’(Y01226136)the Thousand Young Talents Program。
文摘The structural basis for histone recognition by the histone chaperone nuclear autoantigenic sperm protein(NASP)remains largely unclear.Here,we showed that Arabidopsis thaliana AtNASP is a monomer and displays robust nucleosome assembly activity in vitro.Examining the structure of AtNASP complexed with a histone H3α3 peptide revealed a binding mode that is conserved in human NASP.AtNASP recognizes the H3 N-terminal region distinct from human NASP.Moreover,AtNASP forms a co-chaperone complex with ANTI-SILENCING FUNCTION 1 ASF1 by binding to the H3 Nterminal region.Therefore,we deciphered the structure of AtNASP and the basis of the AtNASP-H3 interaction.
文摘利用cDNA末端快速扩增技术克隆出凡纳滨对虾(Litopenaeus vannamei)核自身抗原精子蛋白(NASP)基因,NASP基因c DNA全长2258 bp,其中包括92 bp 5′端非编码区,147 bp 3′端非编码区及2019 bp开放阅读区,编码673个氨基酸,预测分子量为74.18 k D。该序列已提交至Gen Bank,序列号为KT274811。在NCBI上进行序列比对后发现,其与斑节对虾(Penaeus monodon)NASP序列相似性最高,为90%。采用荧光定量PCR方法测定了不同发育时期卵巢与肝胰腺中NASP m RNA相对表达水平,结果表明,NASP在卵巢中的表达量高于肝胰腺中的表达量,且在Ⅱ期表达量最高,Ⅲ期表达量最低。此外,通过构建系统进化树比较了凡纳滨对虾NASP与其他物种间的遗传距离。实验结果为进一步研究该基因在凡纳滨对虾卵巢发育中的作用提供了依据。
