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RNA protein interactions governing expression of the most abundant protein in human body, type I collagen.

Title: RNA protein interactions governing expression of the most abundant protein in human body, type I collagen.
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Name(s): Stefanovic, Branko, author
Type of Resource: text
Genre: Journal Article
Text
Date Issued: 2013-09-01
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: Type I collagen is the most abundant protein in human body. The protein turns over slowly and its replacement synthesis is low. However, in wound healing or in pathological fibrosis the cells can increase production of type I collagen several hundred fold. This increase is predominantly due to posttranscriptional regulation, including increased half-life of collagen messenger RNAs (mRNAs) and their increased translatability. Type I collagen is composed of two α1 and one α2 polypeptides that fold into a triple helix. This stoichiometry is strictly regulated to prevent detrimental synthesis of α1 homotrimers. Collagen polypeptides are co-translationally modified and the rate of modifications is in dynamic equilibrium with the rate of folding, suggesting coordinated translation of collagen α1(I) and α2(I) polypeptides. Collagen α1(I) mRNA has in the 3' untranslated region (UTR) a C-rich sequence that binds protein αCP, this binding stabilizes the mRNA in collagen producing cells. In the 5' UTR both collagen mRNAs have a conserved stem-loop (5' SL) structure. The 5' SL is critical for high collagen expression, knock in mice with disruption of the 5' SL are resistant to liver fibrosis. the 5' SL binds protein LARP6 with strict sequence specificity and high affinity. LARP6 recruits RNA helicase A to facilitate translation initiation and associates collagen mRNAs with vimentin and nonmuscle myosin filaments. Binding to vimentin stabilizes collagen mRNAs, while nonmuscle myosin regulates coordinated translation of α1(I) and α2(I) mRNAs. When nonmuscle myosin filaments are disrupted the cells secrete only α1 homotrimers. Thus, the mechanism governing high collagen expression involves two RNA binding proteins and development of cytoskeletal filaments.
Identifier: FSU_pmch_23907854 (IID), 10.1002/wrna.1177 (DOI), PMC3748166 (PMCID), 23907854 (RID), 23907854 (EID)
Grant Number: R01 DK059466, 2R01DK059466-07A2
Publication Note: This NIH-funded author manuscript originally appeared in PubMed Central at https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3748166.
Subject(s): Animals
Autoantigens/metabolism
Collagen Type I/biosynthesis
Gene Expression Regulation
Heterogeneous-Nuclear Ribonucleoproteins/metabolism
Humans
Mice
RNA Stability
RNA, Messenger/metabolism
RNA-Binding Proteins/metabolism
Ribonucleoproteins/metabolism
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_pmch_23907854
Owner Institution: FSU
Is Part Of: Wiley interdisciplinary reviews. RNA.
1757-7012
Issue: iss. 5, vol. 4

Choose the citation style.
Stefanovic, B. (2013). RNA protein interactions governing expression of the most abundant protein in human body, type I collagen. Wiley Interdisciplinary Reviews. Rna. Retrieved from http://purl.flvc.org/fsu/fd/FSU_pmch_23907854