First time at Proteopedia? Click on the green links: they change the 3D image. Click and drag the molecules. Proteopedia is a 3D, interactive encyclopedia of proteins, RNA, DNA and other molecules. With a free user account, you can edit pages in Proteopedia. Visit the Main Page to learn more.

1s9m

From Proteopedia

Jump to: navigation, search
Theoretical Model: The protein structure described on this page was determined theoretically, and hence should be interpreted with caution.


1s9m ()
Resources: FirstGlance, PDBsum
Coordinates: save as pdb, mmCIF, xml



STRUCTURAL MODEL OF THE P170R HUMAN SOX9-DNA COMPLEX

Publication Abstract from PubMed

In humans, mutations in SOX9 result in a skeletal malformation syndrome, campomelic dysplasia (CD). The present study investigated two major classes of CD mutations: 1) point mutations in the high mobility group (HMG) domain and 2) truncations and frameshifts that alter the C terminus of the protein. We analyzed the effect of one novel mutation and three other point mutations in the HMG domain of SOX9 on the DNA binding and DNA bending properties of the protein. The F12L mutant HMG domain shows negligible DNA binding, the H65Y mutant shows minimal DNA binding, whereas the A19V mutant shows near wild type DNA binding and bends DNA normally. Interestingly, the P70R mutant has altered DNA binding specificity, but also bends DNA normally. The effects of the point mutations were interpreted using a molecular model of the SOX9 HMG domain. We analyzed the effects upon transcription of mutations resembling the truncation and frameshift mutations in CD patients, and found that progressive deletion of the C terminus causes progressive loss of transactivation. Maximal transactivation by SOX9 requires both the C-terminal domain rich in proline, glutamine, and serine and the adjacent domain composed entirely of proline, glutamine, and alanine. Thus, CD arises by mutations that interfere with DNA binding by SOX9 or truncate the C-terminal transactivation domain and thereby impede the ability of SOX9 to activate target genes during organ development.

Functional and structural studies of wild type SOX9 and mutations causing campomelic dysplasia., McDowall S, Argentaro A, Ranganathan S, Weller P, Mertin S, Mansour S, Tolmie J, Harley V, J Biol Chem. 1999 Aug 20;274(34):24023-30. PMID:10446171

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

Reference

  • McDowall S, Argentaro A, Ranganathan S, Weller P, Mertin S, Mansour S, Tolmie J, Harley V. Functional and structural studies of wild type SOX9 and mutations causing campomelic dysplasia. J Biol Chem. 1999 Aug 20;274(34):24023-30. PMID:10446171

Proteopedia Page Contributors and Editors (what is this?)

OCA

Personal tools