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Related Experiment Videos

Complete coding sequence, deduced primary structure, chromosomal localization, and structural analysis of murine

E Walcz1, F Deák, P Erhardt

  • 1Department of Biochemistry, Rush-Presbyterian-St. Luke's Medical Center, Chicago, Illinois 60612.

Genomics
|July 15, 1994
PubMed
Summary

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Researchers sequenced mouse aggrecan (a cartilage proteoglycan) cDNA, revealing its gene on chromosome 7. Mouse aggrecan shares high sequence identity with rat and human counterparts, aiding comparative studies.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Genetics

Background:

  • Aggrecan is the major proteoglycan in cartilage, crucial for its structural integrity.
  • Understanding aggrecan's structure and gene is vital for cartilage biology and disease research.

Purpose of the Study:

  • To isolate and sequence mouse aggrecan cDNA.
  • To determine the full coding sequence and identify gene location.
  • To compare mouse aggrecan structure with other species.

Main Methods:

  • Isolation and sequencing of overlapping cDNA clones from mouse chondrocyte libraries.
  • Bioinformatic analysis of cDNA sequence and protein domains.
  • Gene localization using mouse genetic mapping.

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Main Results:

  • Determined 7386 bp of mouse aggrecan cDNA, including UTRs.
  • Identified the core protein precursor as 2132 amino acids.
  • Mouse aggrecan shows 91.6% identity to rat and 72.5% to human aggrecan.
  • High sequence identity in G1, G2, G3 domains; lower in others.
  • Complement regulatory protein (CRP)-like domain regularly expressed; EGF-like module in a minor fraction.

Conclusions:

  • The complete mouse aggrecan cDNA sequence and gene localization provide a valuable resource.
  • Comparative analysis highlights conserved and variable regions, offering insights into aggrecan function.
  • Expression patterns of specific domains suggest functional implications in cartilage.