Novel mutations in Moloney Murine Leukemia Virus reverse transcriptase increase thermostability through tighter binding to template-primer.

Novel mutations in Moloney Murine Leukemia Virus reverse transcriptase increase thermostability through tighter binding to template-primer.
复制标题

DOI:
10.1093/nar/gkn952
复制
发表时间:
2009-02
影响因子:
14.9
通讯作者:
Hogrefe, Holly
Hogrefe, Holly
中科院分区:
生物学2区
文献类型:
--
作者:
Arezi, Bahram;Hogrefe, Holly

文献摘要

参考文献

被引文献

相似文献

为了增加Moloney鼠白血病病毒逆转录酶(MMLV RT)的热稳定性,我们为变体筛选了随机和位点饱和文库,这些变体显示出对热灭活的抗性的增加。这共同增加了55°C的MMLV RT的半衰期,从少于5分钟到约30分钟,在存在模板纸中,这些突变通过增加五体突变体的特异性活性(M5)。 )在广泛的cDNA合成温度(25-70°C)中,我们进一步表明,与在高温下使用含有次级的RNA目标相比结构。
In an effort to increase the thermostability of Moloney Murine Leukemia Virus reverse transcriptase (MMLV RT), we screened random and site-saturation libraries for variants that show increased resistance to thermal inactivation. We discovered five mutations E69K, E302R, W313F, L435G and N454K that collectively increase the half-life of MMLV RT at 55°C from less than 5 min to ∼30 min in the presence of template-primer. In addition, these mutations alter the thermal profile by increasing specific activity of the pentuple mutant (M5) over a broad range of cDNA synthesis temperatures (25–70°C). We further show that M5 generates higher cDNA yields and exhibits better RT–PCR performance compared to wild-type RT when used at high temperature to amplify RNA targets containing secondary structure. Finally, we demonstrate that M5 exhibits tighter binding (lower Km) to template-primer, which likely protects against heat inactivation.
DOI: 10.1073/pnas.90.13.6320
发表时间: 1993-07-01
影响因子: 11.1
作者:
JACOBOMOLINA, A;DING, JP;ARNOLD, E
通讯作者: ARNOLD, E
DOI: 10.1038/newbio234240a0
发表时间: 1971-01-01
期刊: NATURE-NEW BIOLOGY
影响因子: --
作者:
MOLLING, K;BOLOGNESI, DP;HAUSEN, P
通讯作者: HAUSEN, P
DOI: 10.1093/protein/11.9.739
发表时间: 1998-09-01
期刊: PROTEIN ENGINEERING
影响因子: --
作者:
Shindyalov, IN;Bourne, PE
通讯作者: Bourne, PE
DOI: 10.1002/anie.200602772
发表时间: 2006-01-01
影响因子: 16.6
作者:
Sauter, Katharina B. M.;Marx, Andreas
通讯作者: Marx, Andreas
DOI: 10.2144/02335pf01
发表时间: 2002-11-01
期刊: BIOTECHNIQUES
影响因子: 2.7
作者:
Hogrefe, HH;Cline, J;Allen, RM
通讯作者: Allen, RM