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.
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DOI:
10.1093/nar/gkn952
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发表时间:
2009-02
影响因子:
14.9
通讯作者:
Hogrefe, Holly
中科院分区:
文献类型:
--
作者:
Arezi, Bahram;Hogrefe, Holly
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.
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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
影响因子:
16.6
作者:
Sauter, Katharina B. M.;Marx, Andreas
通讯作者:
Marx, Andreas
影响因子:
2.7
作者:
Hogrefe, HH;Cline, J;Allen, RM
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