Mutant lysenin pores
First Claim
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1. A polypeptide comprising a lysenin monomer comprising a variant of the amino acid sequence of SEQ ID NO:
- 2, wherein the variant has at least 90% amino acid identity to the amino acid sequence of SEQ ID NO;
2 over a stretch of amino acids from position 44 to position 126 of SEQ ID NO;
2, and wherein the polypeptide comprises amino acid substitutions at positions E84 and E92 of SEQ ID NO;
2, wherein the amino acid substitutions at positions E84 and E92 alter the ability of the polypeptide to interact with a polynucleotide by increasing the net positive charge or neutralizing the negative charges at positions E84 and E92.
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Abstract
The invention relates to mutant forms of lysenin. The invention also relates to analyte characterization using lysenin.
109 Citations
24 Claims
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1. A polypeptide comprising a lysenin monomer comprising a variant of the amino acid sequence of SEQ ID NO:
- 2, wherein the variant has at least 90% amino acid identity to the amino acid sequence of SEQ ID NO;
2 over a stretch of amino acids from position 44 to position 126 of SEQ ID NO;
2, and wherein the polypeptide comprises amino acid substitutions at positions E84 and E92 of SEQ ID NO;
2, wherein the amino acid substitutions at positions E84 and E92 alter the ability of the polypeptide to interact with a polynucleotide by increasing the net positive charge or neutralizing the negative charges at positions E84 and E92. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
- 2, wherein the variant has at least 90% amino acid identity to the amino acid sequence of SEQ ID NO;
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24. A polypeptide comprising a variant of the amino acid sequence of SEQ ID NO:
- 2, wherein the variant has amino acid substitutions at positions E84 and E92 of SEQ ID NO;
2 and up to 10 modifications (including the E84 and E92 substitutions) within the amino acid sequence from position 44 to position 126 of SEQ ID NO;
2 at positions selected from the group consisting of;
M44, N46, N48, E50, R52, H58, D68, F70, E71, S74, E76, S78, Y79, S80, H81, S82, E85, S86, Q87, S89, M90, E94, E97, E102, H103, T104, T106, R115, Q117, N119, D121, and D126, and wherein the modifications (including the E84 and E92 substitutions) alter the ability of the polypeptide to interact with a polynucleotide by increasing net positive charge or neutralizing negative charges of amino acids at the selected positions.
- 2, wherein the variant has amino acid substitutions at positions E84 and E92 of SEQ ID NO;
Specification