One way to alleviate this problem is to find more stable mutants of a membrane protein of interest.
In the case of Renilla, new red-shifted and more stable mutants with an emission peak at 535 or 547 nm have been produced by site directed mutagenesis [7], but dual color imaging still remains difficult to perform in part due to the relative low quantum efficiency of CCD cameras below 500 nm (30%), where the native enzyme shows the peak of emission.
The folding time constants are 5.1 and 1.73 μs, respectively, for [A8G,P18A]-TC16b and [S14A,P18A]-TC16b: the [S14A] mutant folds faster than the more stable [A8G] mutant.
In contrast, missense mutations lead to the expression of a more stable albeit mutant form of the ATM protein, as has been described for the few homozygotes carriers of missense mutations that have been studied (Angele(c) et al (2003) and references therein).
Identification of denaturation nuclei suggests that appropriate amino acid replacements at these sites may lead to the design and development of more stable barnase mutants.
Two RE mutants, loxJTZ17 and loxKR3, produced more stable LE+RE double mutant lox than did the lox66/71 double mutant.
Stability comparative studies between wild type and mutant protein-DNA complexes indicate that the former is relatively more stable than the mutant form.
The simulation analysis revealed that V27T mutant is more stable than WT and mutant simulation was successful completely.
So, while breaking the dimer interface is not the rate-limiting step in subunit exchange, destabilizing the ACD dimer yields oligomers that can more readily disassemble to form smaller species with clients and these complexes must be more stable than the mutant sHSP oligomers themselves.
The levels of lysine altering mutant pVHLs were determined using a CHX-mediated assay, and the lysine zero mutant was more stable than the single lysine mutant in both HEK293T and 786-O cells (Fig. 3c and d).
