Nucleic acids encoding factor X analogues having a modified protease cleavage site
Nucleic acids encoding factor X analogues are provided that have a modification in the region of the natural Factor Xa activation cleavage site. The modification results in a processing site for a protease not naturally cleaving in this region of the Factor X sequence.
1. A recombinant nucleic acid comprising a nucleic acid segment that encodes a Factor X analogue, wherein said analogue is a Factor X that has one or more amino acid modifications in a region between Gly228 and Arg234 of SEQ ID NO:27 that results in a sequence Gly228-R6-R5-R4-R3-R2-Arg234-R1 and wherein
a) R1 is an amino acid selected from the group consisting of Ile, Val, Ser, Thr and Ala;
b) R2 is an amino acid selected from the group consisting of Pro, Gly, Lys and Arg;
c) R3 is an amino acid selected from the group consisting of Phe, Lys, Met, Gln, Glu, Ser, Val, Arg and Pro;
d) R4 is an amino acid selected from the group consisting of Asp, Ile, Ser, Met, Pro, Thr, Arg and Lys;
e) R5 is an amino acid selected from the group consisting of Asn, Lys, Ser, Glu, Ala, Gln, His and Arg; and
f) R6 is an amino acid selected from the group consisting of Asp, Phe, Thr, Arg, Leu and Ser.
2. The recombinant nucleic acid of claim 1 , wherein the Factor X analogue encoded by the recombinant nucleic acid has an exchange of Ile235 of SEQ ID NO:27.
3. The recombinant nucleic acid of claim 1 , wherein the modification in the Factor X analogue encoded by the recombinant nucleic acid results in a processing site for a protease selected from the group consisting of an endoprotease, a serine protease, and a derivative of these proteases.
4. The recombinant nucleic acid of claim 3 , wherein the processing site of the Factor X analogue encoded by the recombinant nucleic acid results in a processing site for an endoprotease selected from the group consisting of kexin/Kex2, furin/PACE, PC1/PC3, PC2, PC4, PACE 4, and LPC/PC7, or a serine protease selected from the group consisting of Factor IIa, Factor XIIa, Factor XIa, Factor Xa and kallikrein.
5. The recombinant nucleic acid of claim 1 , wherein the Factor X analogue encoded by the recombinant nucleic acid has a further modification in a C-terminal region, the further modification occurring at Lys370 and/or within a segment extending from Arg469 to Ser476 of SEQ ID NO:27.
6. The recombinant nucleic acid of claim 5 , wherein the further modification of the Factor X analogue encoded by the recombinant nucleic acid is a substitution at Arg469 or Gly470 of SEQ ID NO:27.
7. The recombinant nucleic acid of claim 5 , wherein the further modification of the Factor X analogue encoded by the recombinant nucleic acid is selected from a mutation, a deletion and an insertion between amino acid positions Arg469 and Ser476 of SEQ ID NO:27.
8. The recombinant nucleic acid of claim 5 , wherein the further modification of the Factor X analogue encoded by the recombinant nucleic acid prevents the β-peptide extending from Gly470 to Lys488 of SEQ ID NO:27 from being cleaved off.
9. The recombinant nucleic acid of claim 1 , wherein the Factor X analogue encoded by the recombinant nucleic acid terminates at Arg469.
10. The recombinant nucleic acid of claim 1 , wherein the modification in the Factor X analogue encoded by the recombinant nucleic acid allows for an activation of the Factor X analogue to native Factor Xa or Factor Xa analogue in vitro.
11. The recombinant nucleic acid of claim 1 , wherein the modification in the Factor X analogue encoded by the recombinant nucleic acid allows for an activation of the Factor X analogue to native Factor Xa or Factor Xa analogue in vivo.
12. The recombinant nucleic acid of claim 1 , wherein the modification in the Factor X analogue encoded by the recombinant nucleic acid allows for activation by a serine protease.
13. The recombinant nucleic acid of claim 1 , wherein the modification in the Factor X analogue encoded by the recombinant nucleic acid allows for activation by a serine protease selected from the group consisting of Factor XIIa, Factor XIa, Factor IIa, Factor Xa and kallikrein.
14. The recombinant nucleic acid of claim 1 , wherein the Factor X analogue encoded by the recombinant nucleic acid has an intact β-peptide, the β-peptide extending from Gly470 to Lys488 of SEQ ID NO:27.
15. A vector comprising the recombinant nucleic acid of claim 1 .
16. An isolated cell comprising the vector of claim 15 .