Thermal stability of RNA phage virus-like particles displaying foreign peptides.
Thermal stability of RNA phage virus-like particles displaying foreign peptides.
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DOI:
10.1186/1477-3155-9-22
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发表时间:
2011-05-24
影响因子:
10.2
通讯作者:
Peabody DS
中科院分区:
文献类型:
--
作者:
Caldeira JC;Peabody DS
To be useful for genetic display of foreign peptides a viral coat protein must tolerate peptide insertions without major disruption of subunit folding and capsid assembly. The folding of the coat protein of RNA phage MS2 does not normally tolerate insertions in its AB-loop, but an engineered single-chain dimer readily accepts them as long as they are restricted to one of its two halves. Here we characterize the effects of peptide insertions on the thermal stabilities of MS2 virus-like particles (VLPs) displaying a variety of different peptides in one AB-loop of the coat protein single-chain dimer. These particles typically denature at temperatures around 5-10°C lower than unmodified VLPs. Even so, they are generally stable up to about 50°C. VLPs of the related RNA phage PP7 are cross-linked with intersubunit disulfide bonds and are therefore significantly more stable. An AB-loop insertion also reduces the stability of PP7 VLPs, but they only begin to denature above about 70°C. VLPs assembled from MS2 single-chain dimer coat proteins with peptide insertions in one of their AB-loops are somewhat less stable than the wild-type particle, but still resist heating up to about 50°C. Because they possess disulfide cross-links, PP7-derived VLPs provide an alternate platform with even higher stability.
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影响因子:
3.7
作者:
USHA, R;ROHLL, JB;LOMONOSSOFF, GP
通讯作者:
LOMONOSSOFF, GP
影响因子:
5.5
作者:
Caldeira, Jerri do Carmo;Medford, Alexander;Peabody, David S.
通讯作者:
Peabody, David S.
DOI:
10.1073/pnas.85.9.3203
发表时间:
1988-05-01
影响因子:
11.1
作者:
MURRAY, MG;KUHN, RJ;WIMMER, E
通讯作者:
WIMMER, E
影响因子:
14.9
作者:
Peabody, DS;Lim, F
通讯作者:
Lim, F
影响因子:
3.9
作者:
Peabody, DS
通讯作者:
Peabody, DS