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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Isolation of a cDNA clone for human antithrombin III.

Antithrombin III (ATIII) is an important plasma protease inhibitor with a central role in the coagulation system. On the basis of its protein sequence, ATIII is one member of a "super family" of protease inhibitors that includes alpha 1-antitrypsin and chicken ovalbumin. An increased risk of thromboembolism is associated with inherited ATIII deficiency. To study the structure and expression of the human ATIII gene, we have isolated complementary (cDNA) clones for ATIII from human liver mRNA. ATIII cDNA clones were identified by hybridization to a mixture of synthetic oligodeoxynucleotides encoding amino acids 251-256 of the ATIII protein sequence. The largest cDNA clone (1.4 kilobases) included the coding region of ATIII mRNA from codon 10 through a 3'-untranslated region. Comparison of ATIII cDNA clones from two different sources revealed a sequence polymorphism at an internal PstI restriction site. Analysis of both total genomic DNAs and an ATIII gene cloned in a bacteriophage Charon 4A showed that the ATIII gene is present once per haploid genome and is distributed over 10-16 kilobases of DNA. Computer-assisted comparison of the cDNA sequence with those for baboon alpha 1-antitrypsin and chicken ovalbumin revealed homologies consistent with their inclusion in the protease inhibitor superfamily.[1]

References

  1. Isolation of a cDNA clone for human antithrombin III. Prochownik, E.V., Markham, A.F., Orkin, S.H. J. Biol. Chem. (1983) [Pubmed]
 
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