Document Detail


Changes in proteoglycan composition during development of rat skin. The occurrence in fetal skin of a chondroitin sulfate proteoglycan with high turnover rate.
MedLine Citation:
PMID:  3080414     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Extraction of the skin of newborn rat yielded two populations of galactosaminoglycan-containing proteoglycan: a Mr = 111,000-200,000 dermatan sulfate proteoglycan (DS-PG) with a Mr congruent to 55,000 core glycoprotein and a Mr congruent to 10(6) chondroitin sulfate proteoglycan (CS-PGs) composed of two subpopulations with different size core-glycoproteins (Mr congruent to 480,000 and 520,000). Tryptic peptide mapping of chondroitinase-treated DS-PG and CS-PGs indicated that the peptide patterns observed with the two core molecules from CS-PGs were identical with each other but distinct from the peptide pattern of the DS-PG core molecule. It is likely therefore that the two forms of CS-PGs are derived from the same gene product by post-translational modification or partial degradation, but DS-PG is derived from a distinct gene product. Comparison of the concentration (hexuronate/DNA) of the proteoglycans in newborn and fetal rat skin showed an age-related change in proteoglycan composition; at 4 days before birth, the uronic acid proportions, DS-PG:CS-PGs, were about 14:1 and during the next 4 days, DS-PG increased 2.2-fold whereas CS-PGs decreased 4-fold. On a per DNA basis, the rate of [3H]serine incorporation into CS-PGs was 2.5 times the rate for DS-PG at 4 days before birth but decreased by 95% during the next 4 days. The rate for DS-PG also decreased but to a much lesser extent, so that by 2 days before birth, it began to exceed the rate for CS-PGs. The striking change in the concentration and labeling rate of CS-PGs can be interpreted either as a decrease of CS-PGs synthesis, or as an increase of CS-PGs breakdown, or both, a process which might be involved in the transition of extracellular matrix from a fetal type to a newborn or adult type.
Authors:
H Habuchi; K Kimata; S Suzuki
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of biological chemistry     Volume:  261     ISSN:  0021-9258     ISO Abbreviation:  J. Biol. Chem.     Publication Date:  1986 Jan 
Date Detail:
Created Date:  1986-03-03     Completed Date:  1986-03-03     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  2985121R     Medline TA:  J Biol Chem     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1031-40     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Centrifugation, Density Gradient
Electrophoresis, Polyacrylamide Gel
Female
Glucosamine / metabolism
Kinetics
Molecular Weight
Pregnancy
Proteochondroitin Sulfates / analysis*
Proteoglycans / analysis*
Rats
Rats, Inbred Strains
Serine / metabolism
Skin / embryology*
Trypsin / metabolism
Chemical
Reg. No./Substance:
0/Proteochondroitin Sulfates; 0/Proteoglycans; 3416-24-8/Glucosamine; 56-45-1/Serine; EC 3.4.21.4/Trypsin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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