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Proceedings of the National Academy of Sciences of the United States of America logoLink to Proceedings of the National Academy of Sciences of the United States of America
. 1986 Apr;83(8):2325–2329. doi: 10.1073/pnas.83.8.2325

Exon/intron organization of the chicken type II procollagen gene: intron size distribution suggests a minimal intron size.

W B Upholt, L J Sandell
PMCID: PMC323289  PMID: 3010306

Abstract

Overlapping genomic clones have been isolated that contain the alpha chain and COOH-terminal propeptide coding regions of the chicken type II procollagen gene. All type II procollagen exon sequences present in these clones have been identified and mapped by DNA sequencing. These include 43 exons coding for the alpha-chain triple helix, 1 exon coding for the junction between the COOH-terminal propeptide and the alpha-chain region, and 3 exons coding for the COOH-terminal propeptide and 3' noncoding sequences. With the exception of one additional intron between 2 exons coding for amino acids 568-585 and 586-603, exon-intron boundaries have been conserved when compared with genes for all other characterized genes for fibrillar collagens. The chicken type II procollagen gene differs from most other collagen genes in having introns of considerably smaller average size. The size distribution of the introns suggests that approximately equal to 80 base pairs may be a minimal functional size for introns in this gene. This size of intron may be necessary in a gene with a very large number of small exons to prevent aberrant splicing from removing exon sequence together with intron sequence.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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