Compositions comprising modified collagen and uses therefor

1. A collagen mimetic peptide conjugate, wherein the peptide is an amino acid sequence selected from the group consisting of:

Gly 3 -(ProHypGly) 6 (SEQ ID NO: 13),

Gly 3 -(ProHypGly) 7 (SEQ ID NO: 14),

Gly 3 -(ProHypGly) 8 (SEQ ID NO: 15),

Gly 3 -(ProHypGly) 9 (SEQ ID NO: 16),

(ProHypGly) 6 -Tyr (SEQ ID NO: 17),

(ProHypGly) 7 -Tyr (SEQ ID NO: 18),

(ProHypGly) 8 -Tyr (SEQ ID NO: 19),

Cys-(Pro-Hyp-Gly) 3 (SEQ ID NO: 20),

Cys-(Pro-Hyp-Gly) 5 (SEQ ID NO: 21), and

Cys-(Pro-Hyp-Gly) 7 (SEQ ID NO: 22), and wherein the conjugate is selected from the group consisting of a cell adhesion molecule, a detectable label, a growth factor, a component of the extracellular matrix, a polymer, polyethylene glycol (PEG), and a small molecule.

2. The collagen mimetic peptide conjugate of claim 1 , wherein the peptide comprises: carboxyfluorescein-Gly 3 -(Pro-Hyp-Gly) 9 (SEQ ID NO: 23), carboxyfluorescein-Gly 3 -1ys-(Pro-Hyp-Gly) 8 (SEQ ID NO: 24), PEG 2000 -Gly 3 -(Pro-Hyp-Gly) 7 (SEQ ID NO: 25), Methoxy PEG 2000 -Gly 3 -(Pro-Hyp-Gly) 7 (SEQ ID NO: 6), (Pro-Hyp-Gly) 8 -Gly 3 -PEG 5000 -OH (SEQ ID NO: 26), [AcGly-Gly 2 -Lys-Gly 3 -(Pro-Hyp-Gly) 8 ] 4 -star shaped PEG (core sequence disclosed as SEQ ID NO: 27), [CF-Gly 3 -Lys-Gly 3 -(Pro-Hyp-Gly) 8 ] 4 -star shaped PEG (core sequence disclosed as SEQ ID NO: 28),

AcGly-Gly 2 -Lys-Gly 3 -(Pro-Hyp-Gly) 8 (SEQ ID NO: 29), FL-PEG 2000 -Gly 3 -(Pro-Hyp-Gly) 7 (SEQ ID NO: 30), and

5 carboxyfluorescein-Gly 3 (Pro-Hyp-Gly) 8 -Gly 3 -PEG 5000 -OH (SEQ ID NO: 31).

3. The collagen mimetic peptide conjugate of claim 1 , wherein the detectable label is 5-carboxy-fluorescein.

4. The collagen mimetic peptide conjugate of claim 1 , wherein the cell adhesion molecule is selected from the group consisting of a cadherin, fibronectin, integrin, laminin, and selectin.

5. The collagen mimetic peptide conjugate of claim 1 , wherein the detectable label is selected from the group consisting of a colloidal particle, an enzyme, an electron- dense reagent, a fluorescent dye, a hapten, an immunogen, a magnetic bead, and a radiolabel, gadolinium complex, gadodiamide derivative, ferric ammonium citrate, or mangafodipar trisodium.

6. The collagen mimetic peptide conjugate of claim 1 , wherein the growth factor promotes an activity selected from the group consisting of angiogenesis, cell growth, differentiation, proliferation, neurogenesis, osteogenesis, stem cell renewal, and cell survival.

7. The collagen mimetic peptide conjugate of claim 1 , wherein the component of the extracellular matrix is selected from the group consisting of collagen, elastin, fibrillin, fibronectin, laminin; proteoglycans, hyaluronan, chondroitin sulfate, dermatan sulfate, heparin sulfate, heparin, keratan sulfate, and aggrecan.

8. The collagen mimetic peptide conjugate of claim 1 , wherein the polymer is selected from the group consisting of collagen, poly(ethylene oxide) diacrylate (PEODA), poly(ethylene glycol), poly(2-hydroxyethyl methacrylate), polyacrylic alcohol, and polyvinyl alcohol.

9. The collagen mimetic peptide conjugate of claim 1 , wherein the PEG is selected from the group consisting of a star shaped PEG, a multi-armed PEG, a graft linear PEG.

10. The collagen mimetic peptide conjugate of claim 1 , wherein the small molecule is selected from the group consisting of anti-thrombotics, anti-atherosclerosis agents, and cartilage repair agents.

11. The collagen mimetic peptide conjugate of claim 10 , wherein the anti-thrombotic is selected from the group consisting of heparin-CMP, Hirudin-CMP, Saratin-CMP, TenectaplaseCMP, Lanoteplase-CMP, Monteplase-CMP, Pamiteplase-CMP, Abciximab-CMP, Tirofiban-CMP, Epitfibatide-CMP, and Tifacogin-CMP.

12. The collagen mimetic peptide conjugate of claim 10 , wherein the antiatherosclerosis agent is selected from the group consisting of heparin-CMP, Hirudin- CMP, SaratinCMP, Tenectaplase-CMP, Lanoteplase-CMP, Monteplase-CMP, Pamiteplase-CMP, AbciximabCMP, Tirofiban-CMP, Epitfibatide-CMP, and Tifacogin-CMP.

13. The collagen mimetic peptide conjugate of claim 10 , wherein the cartilage repair agent is chondroitin sulfate.