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DNA-binding specificity of the S8 homeodomain.

作者信息

de Jong R, van der Heijden J, Meijlink F

机构信息

Hubrecht Laboratory, Netherlands Institute for Developmental Biology, Utrecht.

出版信息

Nucleic Acids Res. 1993 Oct 11;21(20):4711-20. doi: 10.1093/nar/21.20.4711.

DOI:10.1093/nar/21.20.4711
PMID:7901837
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC331495/
Abstract

The murine S8 homeobox gene is expressed in a mesenchyme-specific pattern in embryos, as well as in mesodermal cell lines. The S8 homeodomain is overall similar to paired type homeodomains, but at position 50, which is crucial for specific DNA recognition, it contains a Gln, as is found in Antennapedia (Antp)-type homeodomains. We determined the DNA-binding specificity of the purified S8 homeodomain by in vitro selection of random oligonucleotides. The resulting 11-bp consensus binding site, ANC/TC/TAATTAA/GC resembles, but subtly differs from, the recognition sequences of Antp-type homeodomains. Equilibrium binding constants of down to 6.0 x 10(-10) M were found for binding of the S8 homeodomain to selected oligonucleotides. Using specific antibodies and an oligonucleotide containing an S8-site, we detected by band-shift two abundant DNA binding activities in mesodermal cell lines that correspond to S8 and two more that correspond to its close relative MHox. These S8 protein forms are differentially expressed in retinoic acid-treated P19 EC cells.

摘要
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6e29/331495/79b03b81f377/nar00069-0068-b.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6e29/331495/9058dfbed729/nar00069-0065-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6e29/331495/68dd6d9eac73/nar00069-0066-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6e29/331495/9325145abef2/nar00069-0068-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6e29/331495/79b03b81f377/nar00069-0068-b.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6e29/331495/9058dfbed729/nar00069-0065-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6e29/331495/68dd6d9eac73/nar00069-0066-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6e29/331495/9325145abef2/nar00069-0068-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6e29/331495/79b03b81f377/nar00069-0068-b.jpg

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