ISDA

Deposition Date 2001-09-08

Release Date 2003-03-11

Last Version Date 2024-05-29

Entry Detail

PDB ID:

1JXS

Keywords:

DNA BINDING PROTEIN

Title:

Solution Structure of the DNA-Binding Domain of Interleukin Enhancer Binding Factor

Biological Source:

Source Organism:

Homo sapiens (Taxon ID: 9606)

Host Organism:

Escherichia coli BL21

Method Details:

Experimental Method:

SOLUTION NMR

Conformers Calculated:

Conformers Submitted:

Selection Criteria:

all calculated structures submitted

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:interleukin enhancer binding factor
Gene (Uniprot):FOXK2
Chain IDs:A
Chain Length:98
Number of Molecules:1
Biological Source:Homo sapiens

UniProt ID:Q01167 Pfam ID:PF00250

Ligand Molecules

Primary Citation

Solution structure of the DNA-binding domain of interleukin enhancer binding factor 1 (FOXK1a)

Liu, P.P, Chen, Y.C, Li, C, Hsieh, Y.H, Chen, S.W, Chen, S.H, Jeng, W.Y, Chuang, W.J.Show

PROTEINS: STRUCT.,FUNCT.,GENET. 49 543 553 (2002)

PMID: 12402362 DOI: 10.1002/prot.10227

Abstact

Interleukin enhancer binding factor (ILF) binds to the interleukin-2 (IL-2) promoter and regulates IL-2 gene expression. In this study, the 3D structure of the DNA-binding domain of ILF was determined by multidimensional NMR spectroscopy. NMR structure analysis revealed that the DNA-binding domain of ILF is a new member of the winged helix/forkhead family, and that its wing 2 contains an extra alpha-helix. This is the first study to report the presence of a C-terminal alpha-helix in place of a typical wing 2 in a member of this family. This structural difference may be responsible for the different DNA-binding specificity of ILF compared to other winged helix/forkhead proteins. Our deletion studies of the fragments of ILF also suggest that the C-terminal region plays a regulatory role in DNA binding.

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Primary Citation of related structures