title: Effects of glycosylated (2S,4R)-hydroxyproline on the stability and assembly of collagen triple helices.
abstract: Functionalized collagen-mimetic peptides (CMPs) have been widely used in the preparation of collagen-related biomaterials. Among the reported results, the induced noncovalent interactions between the implanted functional groups or moieties were frequently the key elements to promote the self-assembly of small CMPs. In this work, we designed and synthesized a series of glycosylated CMPs in which 4-O-[β-D-galactopyranosyl]-(2S,4R)-4-hydroxyproline (Hyp(Gal)) was incorporated to explore the effects of glycosylation on the stability and assembly of collagen triple helices. Circular dichroism measurements showed that glycosylation of hydroxyproline slightly destabilized the collagen triple helices, but did not reduce their refolding rate. Compared to non-glycosylated CMPs, the incorporation of Hyp(Gal) speeded up the assembly of CMPs, indicating that this modification could assist the self-assembly of CMPs into higher-order structures, such as fibrils. O-Galactosylation of hydroxyproline imposes contrary effects on the triple helix stability and the self-assembly rate of collagen triple helices, exhibiting a piece of important and useful information for designing collagen-related biomaterials. Our finding also suggests that instead of stabilizing the triple helical conformation of CMPs, installing additional forces between CMPs could be a crucial factor to promote the assembly of CMPs into large-scale constructs.
authors: Department of Chemistry, National Tsing Hua University, 101 Sec. 2 Kuang-Fu Rd., Hsinchu, 30013, Taiwan, ROC.
authors: Pei-Wen
authors: PW
authors: Huang
authors: Department of Chemistry, National Tsing Hua University, 101 Sec. 2 Kuang-Fu Rd., Hsinchu, 30013, Taiwan, ROC.
authors: Juyn-Ming
authors: JM
authors: Chang
authors: Department of Chemistry, National Tsing Hua University, 101 Sec. 2 Kuang-Fu Rd., Hsinchu, 30013, Taiwan, ROC. jchorng@mx.nthu.edu.tw.|Frontier Research Center on Fundamental and Applied Science of Matters, National Tsing Hua University, 101 Sec. 2 Kuang-Fu Rd., Hsinchu, 30013, Taiwan, ROC. jchorng@mx.nthu.edu.tw.
authors: Jia-Cherng
authors: 0000-0002-9936-5338
authors: JC
authors: Horng
mesh_terms: D032701:Biomimetics; D002942:Circular Dichroism; D003094:Collagen / Q000737:chemistry*; D024022:Fibrillar Collagens / Q000737:chemistry / Q000187:drug effects; D006031:Glycosylation / Q000187:drug effects; D006909:Hydroxyproline / Q000737:chemistry / Q000494:pharmacology; D010455:Peptides / Q000737:chemistry*; D000072756:Protein Conformation, alpha-Helical / Q000187:drug effects
chemical_list: D024022:Fibrillar Collagens; D010455:Peptides; C022814:glycosylated collagen; D003094:Collagen; D006909:Hydroxyproline
keywords: Collagen-mimetic peptide; Galactosyl; Hydroxyproline; Self-assembly; Triple helix