Abstract: The present invention relates to the development of new derivatives of a bacterial plasminogen activator, Staphylokinase (SAK), having one or more amino acid residues with single or multiple cysteines at the amino and/or carboxy terminal ends and their conjugation with PEG (Polyethylene Glycol), resulting in new Staphylokinase derivatives that display altered oligomeric states, enhanced thermal and protease stability and extended plasma half-life. Also included is the cloning and expression in a suitable bacterial host; purification of Staphylokinase derivatives to homogeneity and their chemical modification by integrating a PEG molecule to create new biologically active Staphylokinases having higher protein stability and improved in vivo plasma half life, that may enhance the clinical potential of Staphylokinase in thrombolytic therapy for the treatment of cardiovascular diseases.

Abstract: The present invention relates to the development of new derivatives of a bacterial plasminogen activator, Staphylokinase (SAK), having one or more amino acid residues with single or multiple cysteines at the amino and/or carboxy terminal ends and their conjugation with PEG (Polyethylene Glycol), resulting in new Staphylokinase derivatives that display altered oligomeric states, enhanced thermal and protease stability and extended plasma half-life. Also included is the cloning and expression in a suitable bacterial host; purification of Staphylokinase derivatives to homogeneity and their chemical modification by integrating a PEG molecule to create new biologically active Staphylokinases having higher protein stability and improved in vivo plasma half life, that may enhance the clinical potential of Staphylokinase in thrombolytic therapy for the treatment of cardiovascular diseases.

Abstract: The present invention relates to the development of new derivatives of a bacterial plasminogen activator, Staphylokinase (SAK), having one or more amino acid residues with single or multiple cysteines at the amino and/or carboxy terminal ends and their conjugation with PEG (Polyethylene Glycol), resulting in new Staphylokinase derivatives that display altered oligomeric states, enhanced thermal and protease stability and extended plasma half-life. Also included is the cloning and expression in a suitable bacterial host; purification of Staphylokinase derivatives to homogeneity and their chemical modification by integrating a PEG molecule to create new biologically active Staphylokinases having higher protein stability and improved in vivo plasma half life, that may enhance the clinical potential of Staphylokinase in thrombolytic therapy for the treatment of cardiovascular diseases.

Abstract: An improved process for the production of streptokinase using a genetically engineered strain of Escherichia coli which overproduces streptokinase intracellularly and more particularly, the overall process disclosed herein, concerns with an improvement in the fermentative production of streptokinase using an optimized growth medium mainly comprised of simple salts and trace-elements; thus, in principal, the present process constitutes an improved and more economical means for the production of streptokinase which may be useful in thrombolytic therapy.

Abstract: The present invention relates to a nucleotide sequence of expression cassette OXY-1 of SEQ ID No. 1, a modified staphylokinase SAK-2 gene of SEQ ID No. 2, a peptide sequence of modified staphylokinase SAK-2 gene, of SEQ ID No. 3, three plasmids having International Deposition Nos. BPL-0019, BPL-0020, and BPL-0021, and their corresponding three recombinant E. Coli; also invention relates to a process for over-producing staphylokinase and its analogues by modulating level of oxygen of its growth medium in a host system, and lastly, a method of dissolving blood clot in a subject in need thereof.

Abstract: An improved process for the production of streptokinase using a genetically engineered strain of Escherichia coli which overproduces streptokinase intracellularly and more particularly, the overall process disclosed herein, concerns with an improvement in the fermentative production of streptokinase using an optimized growth medium mainly comprised of simple salts and trace-elements; thus, in principal, the present process constitutes an improved and more economical means for the production of streptokinase which may be useful in thrombolytic therapy.