The expression level and cytotoxicity of green fluorescent protein are modulated by an additional N-terminal sequence
Nucleotide and amino acid sequences at the N-terminus affect the expression level and cytotoxicity of proteins; however, their effects are not fully understood yet. Here, N-terminal 30 nucleotide/10 amino acid (N10) sequences that affect the expression level and cytotoxicity of a green fluorescent p...
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| Format: | Article |
| Language: | English |
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AIMS Press
2020-05-01
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| Series: | AIMS Biophysics |
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| Online Access: | https://www.aimspress.com/article/10.3934/biophy.2020010/fulltext.html |
| _version_ | 1818537985517289472 |
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| author | Hisao Moriya |
| author_facet | Hisao Moriya |
| author_sort | Hisao Moriya |
| collection | DOAJ |
| description | Nucleotide and amino acid sequences at the N-terminus affect the expression level and cytotoxicity of proteins; however, their effects are not fully understood yet. Here, N-terminal 30 nucleotide/10 amino acid (N10) sequences that affect the expression level and cytotoxicity of a green fluorescent protein were systematically isolated in the budding yeast Saccharomyces cerevisiae. The expression per gene (EPG) and gene copy number limit (CNL) relationships were examined to assess the effects of the N10 sequence. The isolated N10 nucleotide sequences suggested that codon optimality is the major determinant of the protein expression level. A higher number of hydrophobic or cysteine residues in the N10 sequence seemed to increase the cytotoxicity of the protein. Therefore, a high frequency of specific amino acid residues in the outside of the main tertiary structure of proteins might not be preferable. |
| first_indexed | 2024-12-11T18:57:46Z |
| format | Article |
| id | doaj.art-5207dd73addb47158f51b1f83c33a7e1 |
| institution | Directory Open Access Journal |
| issn | 2377-9098 |
| language | English |
| last_indexed | 2024-12-11T18:57:46Z |
| publishDate | 2020-05-01 |
| publisher | AIMS Press |
| record_format | Article |
| series | AIMS Biophysics |
| spelling | doaj.art-5207dd73addb47158f51b1f83c33a7e12022-12-22T00:54:05ZengAIMS PressAIMS Biophysics2377-90982020-05-017212113210.3934/biophy.2020010The expression level and cytotoxicity of green fluorescent protein are modulated by an additional N-terminal sequenceHisao Moriya0Graduate School of Environmental and Life Sciences, Research Core for Interdisciplinary Sciences, Okayama UniversityNucleotide and amino acid sequences at the N-terminus affect the expression level and cytotoxicity of proteins; however, their effects are not fully understood yet. Here, N-terminal 30 nucleotide/10 amino acid (N10) sequences that affect the expression level and cytotoxicity of a green fluorescent protein were systematically isolated in the budding yeast Saccharomyces cerevisiae. The expression per gene (EPG) and gene copy number limit (CNL) relationships were examined to assess the effects of the N10 sequence. The isolated N10 nucleotide sequences suggested that codon optimality is the major determinant of the protein expression level. A higher number of hydrophobic or cysteine residues in the N10 sequence seemed to increase the cytotoxicity of the protein. Therefore, a high frequency of specific amino acid residues in the outside of the main tertiary structure of proteins might not be preferable.https://www.aimspress.com/article/10.3934/biophy.2020010/fulltext.htmlgreen fluorescent proteinoverexpressionexpression limitexpression levelprotein cytotoxicity |
| spellingShingle | Hisao Moriya The expression level and cytotoxicity of green fluorescent protein are modulated by an additional N-terminal sequence AIMS Biophysics green fluorescent protein overexpression expression limit expression level protein cytotoxicity |
| title | The expression level and cytotoxicity of green fluorescent protein are modulated by an additional N-terminal sequence |
| title_full | The expression level and cytotoxicity of green fluorescent protein are modulated by an additional N-terminal sequence |
| title_fullStr | The expression level and cytotoxicity of green fluorescent protein are modulated by an additional N-terminal sequence |
| title_full_unstemmed | The expression level and cytotoxicity of green fluorescent protein are modulated by an additional N-terminal sequence |
| title_short | The expression level and cytotoxicity of green fluorescent protein are modulated by an additional N-terminal sequence |
| title_sort | expression level and cytotoxicity of green fluorescent protein are modulated by an additional n terminal sequence |
| topic | green fluorescent protein overexpression expression limit expression level protein cytotoxicity |
| url | https://www.aimspress.com/article/10.3934/biophy.2020010/fulltext.html |
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