5KL2

Wilms Tumor Protein (WT1) ZnF2-4 in complex with DNA

Summary for 5KL2

• Entry DOI: 10.2210/pdb5kl2/pdb
• Related: 5KL3 5KL4 5KL5 5KL6 5KL7
• Descriptor: Wilms tumor protein, DNA (5'-D(*AP*GP*CP*GP*TP*GP*GP*GP*AP*GP*T)-3'), DNA (5'-D(*TP*AP*CP*TP*CP*CP*CP*AP*CP*GP*C)-3'), ... (7 entities in total)
• Functional Keywords: wilms tumor protein, wt1, zinc finger, transcription-dna complex, transcription/dna
• Biological source: Homo sapiens (Human); More
• Total number of polymer chains: 3
• Total formula weight: 18520.83

Authors

Hashimoto, H.,Cheng, X. (deposition date: 2016-06-23, release date: 2016-09-14, Last modification date: 2023-09-27)

Primary citation

Hashimoto, H.,Zhang, X.,Zheng, Y.,Wilson, G.G.,Cheng, X.
Denys-Drash syndrome associated WT1 glutamine 369 mutants have altered sequence-preferences and altered responses to epigenetic modifications.
Nucleic Acids Res., 44:10165-10176, 2016

PubMed Abstract: Mutations in human zinc-finger transcription factor WT1 result in abnormal development of the kidneys and genitalia and an array of pediatric problems including nephropathy, blastoma, gonadal dysgenesis and genital discordance. Several overlapping phenotypes are associated with WT1 mutations, including Wilms tumors, Denys-Drash syndrome (DDS), Frasier syndrome (FS) and WAGR syndrome (Wilms tumor, aniridia, genitourinary malformations, and mental retardation). These conditions vary in severity from individual to individual; they can be fatal in early childhood, or relatively benign into adulthood. DDS mutations cluster predominantly in zinc fingers (ZF) 2 and 3 at the C-terminus of WT1, which together with ZF4 determine the sequence-specificity of DNA binding. We examined three DDS associated mutations in ZF2 of human WT1 where the normal glutamine at position 369 is replaced by arginine (Q369R), lysine (Q369K) or histidine (Q369H). These mutations alter the sequence-specificity of ZF2, we find, changing its affinity for certain bases and certain epigenetic forms of cytosine. X-ray crystallography of the DNA binding domains of normal WT1, Q369R and Q369H in complex with preferred sequences revealed the molecular interactions responsible for these affinity changes. DDS is inherited in an autosomal dominant fashion, implying a gain of function by mutant WT1 proteins. This gain, we speculate, might derive from the ability of the mutant proteins to sequester WT1 into unproductive oligomers, or to erroneously bind to variant target sequences.

PubMed: 27596598
DOI: 10.1093/nar/gkw766

Experimental method

X-RAY DIFFRACTION (1.692 Å)