? Collagen is the most abundant protein in humans, and mutations in collagen can lead to death or disease. The ways in which individual mutations affect collagen structure/function are poorly understood. Collagen is a fibrillar protein, and thus many of the principles elucidated for the study of globular proteins are not immediately applicable in investigating the relationship between its structure and function. We now have an opportunity to use genomic technologies to survey the variation in key collagen genes throughout the human population, link the discovered polymorphisms to their structural effects, and develop an understanding of the mechanism of collagenous disorders. This work will also provide a foundation for engineering new treatments and the designing of novel collagen-like biomaterials. ? ? The long-term goal of this proposal is to determine the chemical, physical and structural properties of biopolymers in the context of natural sequence variation. We will take advantage of our joint capabilities in genomics and structural biology to pursue the following specific aims: (1) to identify Single Nucleotide Polymorphisms (SNPs) in an ethnically diverse population to determine the background genetic variation across the collagen genes COL1A1, COL1A2, COL2A1 and COL3A1 and then determine the distribution of SNPs in individuals with collagen disorders; (2) to model collagen-like peptides and full-length Type I and Type III collagen triple helices to determine the structural and energetic effects resulting from single point glycine substitutions in the collagen-like peptides and genetic variation in the full-length collagen models.; (3) to develop analysis tools that incorporate function and phenotypes observed in molecular dynamics simulations to construct a working model of type I collagen for OI-associated mutations; and, (4) to develop methods to simulate the folding and unfolding of native and mutant collagen-like peptides to determine the effects induced by mutations with phenotypic consequences. ? ?

Agency
National Institute of Health (NIH)
Institute
National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)
Type
Research Project (R01)
Project #
5R01AR051582-02
Application #
6933069
Study Section
Special Emphasis Panel (ZRG1-SSS-M (01))
Program Officer
Tyree, Bernadette
Project Start
2004-08-05
Project End
2008-06-30
Budget Start
2005-07-01
Budget End
2006-06-30
Support Year
2
Fiscal Year
2005
Total Cost
$436,371
Indirect Cost
Name
Stanford University
Department
Genetics
Type
Schools of Medicine
DUNS #
009214214
City
Stanford
State
CA
Country
United States
Zip Code
94305
Makareeva, Elena; Sun, Guoli; Mirigian, Lynn S et al. (2018) Substitutions for arginine at position 780 in triple helical domain of the ?1(I) chain alter folding of the type I procollagen molecule and cause osteogenesis imperfecta. PLoS One 13:e0200264
Pyott, Shawna M; Pepin, Melanie G; Schwarze, Ulrike et al. (2011) Recurrence of perinatal lethal osteogenesis imperfecta in sibships: parsing the risk between parental mosaicism for dominant mutations and autosomal recessive inheritance. Genet Med 13:125-30
Bodian, Dale L; Radmer, Randall J; Holbert, Sean et al. (2011) Molecular dynamics simulations of the full triple helical region of collagen type I provide an atomic scale view of the protein's regional heterogeneity. Pac Symp Biocomput :193-204
Pyott, Shawna M; Schwarze, Ulrike; Christiansen, Helena E et al. (2011) Mutations in PPIB (cyclophilin B) delay type I procollagen chain association and result in perinatal lethal to moderate osteogenesis imperfecta phenotypes. Hum Mol Genet 20:1595-609
Christiansen, Helena E; Schwarze, Ulrike; Pyott, Shawna M et al. (2010) Homozygosity for a missense mutation in SERPINH1, which encodes the collagen chaperone protein HSP47, results in severe recessive osteogenesis imperfecta. Am J Hum Genet 86:389-98
Bodian, Dale L; Klein, Teri E (2009) COLdb, a database linking genetic data to molecular function in fibrillar collagens. Hum Mutat 30:946-51
Bodian, Dale L; Chan, Ting-Fung; Poon, Annie et al. (2009) Mutation and polymorphism spectrum in osteogenesis imperfecta type II: implications for genotype-phenotype relationships. Hum Mol Genet 18:463-71
Chan, Ting-Fung; Poon, Annie; Basu, Analabha et al. (2008) Natural variation in four human collagen genes across an ethnically diverse population. Genomics 91:307-14
Bodian, Dale L; Madhan, Balaraman; Brodsky, Barbara et al. (2008) Predicting the clinical lethality of osteogenesis imperfecta from collagen glycine mutations. Biochemistry 47:5424-32
Park, Sanghyun; Klein, Teri E; Pande, Vijay S (2007) Folding and misfolding of the collagen triple helix: Markov analysis of molecular dynamics simulations. Biophys J 93:4108-15

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