Mutant pores
First Claim
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1. A mutant Mycobacterium smegmatis porin (Msp) monomer comprising a variant of the sequence that is at least 90% identical to the sequence of SEQ ID NO:
- 2, which comprises a cap forming region and a barrel forming region, wherein the variant;
(a) does not comprise aspartic add (D) at position 90;
(b) does not comprise aspartic acid (D) at position 91;
(c) comprises aspartic add (D) or glutamic add (E) at position 93; and
(d) comprises one or more amino acid modifications in the cap forming region and/or the barrel forming region of SEQ ID NO;
2 such that, when the mutant Msp monomer forms a pore, the net negative charge of inward facing amino acids is decreased, and wherein the cap forming region comprises amino acids 1 to 72 and 122 to 184 of SEQ ID NO;
2.
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Abstract
The invention relates to mutant forms of Msp. The invention also relates to polynucleotide characterization using Msp.
124 Citations
11 Claims
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1. A mutant Mycobacterium smegmatis porin (Msp) monomer comprising a variant of the sequence that is at least 90% identical to the sequence of SEQ ID NO:
- 2, which comprises a cap forming region and a barrel forming region, wherein the variant;
(a) does not comprise aspartic add (D) at position 90; (b) does not comprise aspartic acid (D) at position 91; (c) comprises aspartic add (D) or glutamic add (E) at position 93; and (d) comprises one or more amino acid modifications in the cap forming region and/or the barrel forming region of SEQ ID NO;
2 such that, when the mutant Msp monomer forms a pore, the net negative charge of inward facing amino acids is decreased, and wherein the cap forming region comprises amino acids 1 to 72 and 122 to 184 of SEQ ID NO;
2. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- 2, which comprises a cap forming region and a barrel forming region, wherein the variant;
Specification