[0019] Figure 9: shows the expression เวกเตอร์ pTLPC26 (also called pTlc26) which encodes a fusion protein ซึ่งประกอบรวมด้วย the OmpA signal sequence (OmpA) and a human tear ไลโปคาลิน มิวทีน followed by the Strep-tag II. Both the BstXI-restriction ตำแหน่ง used for the cloning of the mutated gene cassette and the restriction ตำแหน่ง flanking the structural gene are labeled. Gene expression is under the control of the tetracycline promoter/operator (tetP10). Transcription is terminated at the lipoprotein transcription terminator (t1pp). The เวกเตอร์ further ประกอบรวมด้วย an origin of replication (ori), the intergenic บริเวณ of the filamentous phage fl (fl• IG), the ampicillin resistance gene (amp) and the tetracycline repressor gene (tetR). A relevant segment of the nucleic acid sequence of pTLPC26 is given in the sequence listing as SEQ ID NO: 35. The segment begins with the XbaI restriction ตำแหน่ง and ends with the HindIII restriction ตำแหน่ง. The เวกเตอร์ elements outside this บริเวณ are identical with the เวกเตอร์ pASK75, the. complete nucleotide sequence of which is given in the German patent publication DE 44
17 598 Al.
[0020] Figure 10: depicts an alignment of amino acid sequences of certain hum.antear ไลโปคาลิน based มิวทีน (listed as SEQ ID NOs: 2-28) in comparison with the polypeptide sequence of ไลโปคาลิน น้ำตามนุษย์ เต็มวัย (SEQ ID NO: 1).
[0021] Figure 11: รูป 11 A provides the expected distribution of amino acids encoded for Example 3. Note that for clarity, all amino acids having a frequency of less than
1 % are omitted; the amber stop codon (TAG) is taken as encoding glutamine because a codon suppresor bacterial strain, TGl F, is used in the phage display process. In addition, experimental data obtained from the sequencing of maturation libraries (รูป 11 B and รูป 11
C) shows that there is a good match between the expected and the experimental distribution, albeit with the frequency of serine being higher than desired, reflecting either biases in oligo synthesis or oligo assembly by PCR. In line with this finding, the experimentally obtained frequency of mutation distributions for two libraries (รูป 11 E andรูป 11 F) are close to the theoretically expected distribution (รูป 11 D), but shifted to a lower frequency.
[0022] Figure 12: depicts a thermogram, obtained from a nano Differential Scanning Calorimeter ("nanoDSC") measurement using a capillary nanoDSC instrument (Q2000, TA Instruments), representing overlays of melting curves of ไลโปคาลิน มิวทีน (SEQ ID NO: 13 and SEQ ID NOs: 63-65). Melting curves of thermo-stabilized derivatives (SEQ ID NOs: 63-
65) are significantly shifted compared to SEQ ID NO: 13.
[0023] Figure 13: provides typical measurements of on-rate and off-rate by Surface Plasmon Resonance for the ไลโปคาลิน มิวทีน (SEQ ID NOs: 62-71). รูป13A-รูป13J corresponds to SEQ ID NOs: 62-71 respectively. The resulting dissociation constants (KD), the association rates (kon) and the dissociation rates (koff) to ฮิวเมน PCSK9 ("hPCSK9") (SEQ ID NO: 34) are summarized in Table 10 of Example 17.
[0024] Figure 14: depicts an alignment of amino acid sequences of certain human tear ไลโปคาลิน based มิวทีน (listed as SEQ ID NOs: 13, 22, 62-71) in comparison with the polypeptide sequence of ไลโปคาลิน น้ำตามนุษย์ เต็มวัย (SEQ ID NO: 1).
IV. DETAILED DESCRIPTION OF THE การเปิดเผย
[0025] In one aspect, the present การเปิดเผย provides มิวทีน of human tear ไลโปคาลิน that bind to proprotein convertase subtilisin/kexin type 9 or PCSK9. ในบางรุรุ, the ไลโปคาลิน มิวทีน have a high แอฟฟินิตี้ for PCSK9. PCSK9 as a target of a มิวทีน of the การเปิดเผยนี้ is typically a mammalian protein, for example, a non-human primate
protein or a human protein. Full-length human PCSK.9 has the amino acid sequence shown in
SEQ ID NO: 34.
[0019] Figure 9: shows the expression เวกเตอร์ pTLPC26 (also called pTlc26) which encodes a fusion protein ซึ่งประกอบรวมด้วย the OmpA signal sequence (OmpA) and a human tear ไลโปคาลิน มิวทีน followed by the Strep-tag II. Both the BstXI-restriction ตำแหน่ง used for the cloning of the mutated gene cassette and the restriction ตำแหน่ง flanking the structural gene are labeled. Gene expression is under the control of the tetracycline promoter/operator (tetP10). Transcription is terminated at the lipoprotein transcription terminator (t1pp). The เวกเตอร์ further ประกอบรวมด้วย an origin of replication (ori), the intergenic บริเวณ of the filamentous phage fl (fl• IG), the ampicillin resistance gene (amp) and the tetracycline repressor gene (tetR). A relevant segment of the nucleic acid sequence of pTLPC26 is given in the sequence listing as SEQ ID NO: 35. The segment begins with the XbaI restriction ตำแหน่ง and ends with the HindIII restriction ตำแหน่ง. The เวกเตอร์ elements outside this บริเวณ are identical with the เวกเตอร์ pASK75, the. complete nucleotide sequence of which is given in the German patent publication DE 4417 598 Al. [0020] Figure 10: depicts an alignment of amino acid sequences of certain hum.antear ไลโปคาลิน based มิวทีน (listed as SEQ ID NOs: 2-28) in comparison with the polypeptide sequence of ไลโปคาลิน น้ำตามนุษย์ เต็มวัย (SEQ ID NO: 1).[0021] Figure 11: รูป 11 A provides the expected distribution of amino acids encoded for Example 3. Note that for clarity, all amino acids having a frequency of less than1 % are omitted; the amber stop codon (TAG) is taken as encoding glutamine because a codon suppresor bacterial strain, TGl F, is used in the phage display process. In addition, experimental data obtained from the sequencing of maturation libraries (รูป 11 B and รูป 11C) shows that there is a good match between the expected and the experimental distribution, albeit with the frequency of serine being higher than desired, reflecting either biases in oligo synthesis or oligo assembly by PCR. In line with this finding, the experimentally obtained frequency of mutation distributions for two libraries (รูป 11 E andรูป 11 F) are close to the theoretically expected distribution (รูป 11 D), but shifted to a lower frequency.[0022] Figure 12: depicts a thermogram, obtained from a nano Differential Scanning Calorimeter ("nanoDSC") measurement using a capillary nanoDSC instrument (Q2000, TA Instruments), representing overlays of melting curves of ไลโปคาลิน มิวทีน (SEQ ID NO: 13 and SEQ ID NOs: 63-65). Melting curves of thermo-stabilized derivatives (SEQ ID NOs: 63-65) are significantly shifted compared to SEQ ID NO: 13.
[0023] Figure 13: provides typical measurements of on-rate and off-rate by Surface Plasmon Resonance for the ไลโปคาลิน มิวทีน (SEQ ID NOs: 62-71). รูป13A-รูป13J corresponds to SEQ ID NOs: 62-71 respectively. The resulting dissociation constants (KD), the association rates (kon) and the dissociation rates (koff) to ฮิวเมน PCSK9 ("hPCSK9") (SEQ ID NO: 34) are summarized in Table 10 of Example 17.
[0024] Figure 14: depicts an alignment of amino acid sequences of certain human tear ไลโปคาลิน based มิวทีน (listed as SEQ ID NOs: 13, 22, 62-71) in comparison with the polypeptide sequence of ไลโปคาลิน น้ำตามนุษย์ เต็มวัย (SEQ ID NO: 1).
IV. DETAILED DESCRIPTION OF THE การเปิดเผย
[0025] In one aspect, the present การเปิดเผย provides มิวทีน of human tear ไลโปคาลิน that bind to proprotein convertase subtilisin/kexin type 9 or PCSK9. ในบางรุรุ, the ไลโปคาลิน มิวทีน have a high แอฟฟินิตี้ for PCSK9. PCSK9 as a target of a มิวทีน of the การเปิดเผยนี้ is typically a mammalian protein, for example, a non-human primate
protein or a human protein. Full-length human PCSK.9 has the amino acid sequence shown in
SEQ ID NO: 34.
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