Abstract
Dlx5, a member of the Dlx family of homeodomain proteins, plays a critical role in bone development and fracture healing. To understand the molecular mechanism underlying the transcriptional regulation by Dlx5, we performed yeast two-hybrid screening and isolated a novel protein, Dlxin-1, that binds Dlx5 and regulates its transcriptional function. Dlxin-1 cDNA encodes a 775-amino acid protein that has a partial homology with necdin at the C terminus and 25 repeats of hexapeptides (WQXPXX) in the middle region. Dlxin-1 mRNA is expressed in various adult tissues, but not the spleen, and also in osteoblastic and chondrogenic cell lines. During embryogenesis, a strong signal for Dlxin-1 mRNA was found in cell layers surrounding cartilaginous elements in bone rudiment during digit formation. Dlxin-1 binds not only Dlx5 but also Dlx7 and Msx2 and forms homomultimers in vivo. Transfection and reporter gene assays indicate that Dlxin-1 activates the transcriptional function of Dlx5. Therefore, Dlxin-1 may act as a regulator of the function of Dlx family members in bone formation.
| Original language | English |
|---|---|
| Pages (from-to) | 5331-5338 |
| Number of pages | 8 |
| Journal | Journal of Biological Chemistry |
| Volume | 276 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 2001 Feb 16 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Biochemistry
Cite this
Dlxin-1, a Novel Protein That Binds Dlx5 and Regulates Its Transcriptional Function. / Masuda, Yoshiko; Sasak, Aya; Shibuya, Hiroshi; Ueno, Naoto; Ikeda, Kyoji; Watanabe, Ken.
In: Journal of Biological Chemistry, Vol. 276, No. 7, 16.02.2001, p. 5331-5338.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Dlxin-1, a Novel Protein That Binds Dlx5 and Regulates Its Transcriptional Function
AU - Masuda, Yoshiko
AU - Sasak, Aya
AU - Shibuya, Hiroshi
AU - Ueno, Naoto
AU - Ikeda, Kyoji
AU - Watanabe, Ken
PY - 2001/2/16
Y1 - 2001/2/16
N2 - Dlx5, a member of the Dlx family of homeodomain proteins, plays a critical role in bone development and fracture healing. To understand the molecular mechanism underlying the transcriptional regulation by Dlx5, we performed yeast two-hybrid screening and isolated a novel protein, Dlxin-1, that binds Dlx5 and regulates its transcriptional function. Dlxin-1 cDNA encodes a 775-amino acid protein that has a partial homology with necdin at the C terminus and 25 repeats of hexapeptides (WQXPXX) in the middle region. Dlxin-1 mRNA is expressed in various adult tissues, but not the spleen, and also in osteoblastic and chondrogenic cell lines. During embryogenesis, a strong signal for Dlxin-1 mRNA was found in cell layers surrounding cartilaginous elements in bone rudiment during digit formation. Dlxin-1 binds not only Dlx5 but also Dlx7 and Msx2 and forms homomultimers in vivo. Transfection and reporter gene assays indicate that Dlxin-1 activates the transcriptional function of Dlx5. Therefore, Dlxin-1 may act as a regulator of the function of Dlx family members in bone formation.
AB - Dlx5, a member of the Dlx family of homeodomain proteins, plays a critical role in bone development and fracture healing. To understand the molecular mechanism underlying the transcriptional regulation by Dlx5, we performed yeast two-hybrid screening and isolated a novel protein, Dlxin-1, that binds Dlx5 and regulates its transcriptional function. Dlxin-1 cDNA encodes a 775-amino acid protein that has a partial homology with necdin at the C terminus and 25 repeats of hexapeptides (WQXPXX) in the middle region. Dlxin-1 mRNA is expressed in various adult tissues, but not the spleen, and also in osteoblastic and chondrogenic cell lines. During embryogenesis, a strong signal for Dlxin-1 mRNA was found in cell layers surrounding cartilaginous elements in bone rudiment during digit formation. Dlxin-1 binds not only Dlx5 but also Dlx7 and Msx2 and forms homomultimers in vivo. Transfection and reporter gene assays indicate that Dlxin-1 activates the transcriptional function of Dlx5. Therefore, Dlxin-1 may act as a regulator of the function of Dlx family members in bone formation.
UR - http://www.scopus.com/inward/record.url?scp=0035895892&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035895892&partnerID=8YFLogxK
U2 - 10.1074/jbc.M008590200
DO - 10.1074/jbc.M008590200
M3 - Article
C2 - 11084035
AN - SCOPUS:0035895892
VL - 276
SP - 5331
EP - 5338
JO - Journal of Biological Chemistry
JF - Journal of Biological Chemistry
SN - 0021-9258
IS - 7
ER -