Amino acid substitution model

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Master thesis Computer science: Amino acid substitution model for rotavirus

In this thesis, using the data from the Viral Genome Resource at National Center for Biotechnology Informa-tion (NCBI), we propose the ROTA model that has been specifically estimated formodeling the evolution of rotavirus.

56p tamynhan0 04-07-2020 21 3 Download

Báo cáo khoa học: Structural and biological effects of a b2- or b3-amino acid insertion in a peptide Application to molecular recognition of substance P by the neurokinin-1 receptor

Molecular mechanics calculations on conformers of Ac-HGly-NHMe, Ac-b 2 -HAla-NHMe and Ac-b 3 -HAla-NHMe indicate that low-energy conformations of the b-amino acids backbone, corresponding to gauche rotamers around the Ca–Cbbond, may overlap canonical backbone conformers observed for a-amino acids. Therefore, Sub-stance P (SP) was used as a model peptide to analyse the structural and biological consequences of the substitution of Phe7andPhe8by(R)-b 2 -HPheandofGly9byHGly (R)-b 2 -HAla or (S)-b 3 -HAla....

11p tumor12 20-04-2013 33 3 Download

Báo cáo khoa học: Mutations in the C-terminal domain of ALSV (Avian Leukemia and Sarcoma Viruses) integrase alter the concerted DNA integration process in vitro

Integrase (IN) is the retroviral enzyme responsible for the integration of the DNA copy of the retroviral genome into the host cellDNA. TheC-terminal domainof INis involved in DNA binding and enzyme multimerization. We previ-ously performed single amino acid substitutions in the C-terminal domain of the avian leukemia and sarcoma vir-uses (ALSV) IN [Moreauet al. (2002). Arch. Virol.147, 1761–1778].

13p fptmusic 12-04-2013 45 4 Download
Báo cáo khoa học: Local stability identiﬁcation and the role of key acidic amino acid residues in staphylococcal nuclease unfolding

Staphylococcalnuclease is a single domain protein with 149 amino acids. It has no disulfide bonds, which makes it a simple model for the study of pro-tein folding. In this study, 20 mutants of this protein were generated each with a single base substitution of glycine for negatively charged glutamic acid or aspartic acid. Using differential scanning microcalorimetry in ther-mal denaturation experiments, we identified two mutants, E75G and E129G, having approximately 43% and 44%, respectively, lowerDHcal values than the wild-type protein....

8p fptmusic 11-04-2013 46 3 Download
Báo cáo khoa học: Local stability identiﬁcation and the role of a key aromatic amino acid residue in staphylococcal nuclease refolding

Staphylococcal nuclease (SNase) is a model protein that contains one domain and no disulfide bonds. Its stability in the native state may be maintained mainly by key amino acids. In this study, two point-mutated proteins each with a single base substitution [alanine for tryptophan (W140A) and alanine for lysine (K133A)] and two truncated fragment proteins {positions 1–139 [SNase(1–139) or W140O] and positions 1–141 [SNase(1–141) or E142O]} were generated.

7p fptmusic 11-04-2013 40 3 Download