Growth Factor Analogs
a technology of growth factor and analogs, which is applied in the direction of peptides/protein ingredients, peptides, immunoglobulins, etc., can solve the problems of high preparation cost, general difficulty in preparation, and none of these or other known heparin-binding growth factor analogs provide the advantages, so as to stimulate the signaling of growth factor receptors and stimulate cell proliferation.
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example 1
[0153]The synthetic HBGF analog, PBA1-1, was synthesized by standard solid phase peptide synthesis methods. PBA1-1 has a structure according to formula II, in which the amino acid sequences of the X region is WVLFNANTRDILRRSI (SEQ ID NO:39) (considering the sequence in the conventional N C orientation, notwithstanding that it is branched sequence). Each of the two X region peptides of SEQ ID NO:39 are covalently linked by amide bonds to a lysine residue, the lysine residues corresponding to J1 and J2. The J2 Lys is bound by means of a covalent peptide bond to one terminus of a tripeptide formed from two glycine amino acid residues and corresponding to J3.
[0154]The peptides were assembled stepwise by solid-phase synthesis on a substituted benzhydrylamine resin, using Fmoc chemistry for temporary protection of amino groups in the repetitive cycles. Branching of the chain was accomplished by stepwise growth of identical chains from the side-chain amino groups of consecutive lysyl resid...
example 2
[0157]A synthetic HBGF analog, PBA2-1, was synthesized by standard solid phase peptide synthesis methods. The amino acid sequence KKRVIEIKRV (SEQ ID NO:40) (again considering the sequence in the conventional N→C orientation, notwithstanding that it is branched sequence) corresponds to the two X region peptides.
[0158]The crude preparation was purified as described above in Example 1. The resulting analog had the following structure:
NH2-K-K-G-G-amide V V R R K K I I E E I I V V R R K K K K
example 3
[0159]A synthetic HBGF analog is synthesized by standard solid phase peptide synthesis methods. The amino acid sequence ISRRLIDRTNANFLVW (SEQ ID NO:41) (again considering the sequence in the conventional N→C orientation, notwithstanding that it is branched sequence) corresponds to the two X region peptides, and is a portion of the known platelet-derived growth factor beta isoform 2 sequence.
[0160]The crude preparation is purified as described above in Example 1. The resulting analog has the following structure:
NH2-K-K-G-G-amide W W V V L L F F N N A A N N T T R R D D I I L L R R R R S S I I
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