8TLO image
Deposition Date 2023-07-27
Release Date 2024-08-14
Last Version Date 2024-12-18
Entry Detail
PDB ID:
8TLO
Keywords:
TRANSCRIPTION
Title:
Crystal Structure Analysis of BCL11A in complex with DNA
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Host Organism:
Escherichia coli BL21(DE3)
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.76 Å
R-Value Free:
0.26
R-Value Work:
0.25
R-Value Observed:
0.25
Space Group:
C 1 2 1
8TLO validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:B-cell lymphoma/leukemia 11A
Gene (Uniprot):BCL11A
Chain IDs:A
Chain Length:110
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q9H165 Pfam ID:PF00096
Polymer Type:polydeoxyribonucleotide
Molecule:DNA (5'-D(P*CP*GP*AP*CP*CP*GP*CP*AP*TP*TP*GP*GP*TP*CP*AP*AP*GP*CP*G)-3')
Chain IDs:B
Chain Length:19
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polydeoxyribonucleotide
Molecule:DNA (5'-D(P*GP*CP*TP*TP*GP*AP*CP*CP*AP*AP*TP*GP*CP*GP*GP*TP*CP*GP*C)-3')
Chain IDs:C
Chain Length:19
Number of Molecules:1
Biological Source:Homo sapiens
Ligand Molecules
ZN
Primary Citation
Structural insights into the DNA-binding mechanism of BCL11A: The integral role of ZnF6.
Structure 32 2276 2286.e4 (2024)
PMID: 39423807 DOI: 10.1016/j.str.2024.09.022

Abstact

The transcription factor BCL11A is a critical regulator of the switch from fetal hemoglobin (HbF: α2γ2) to adult hemoglobin (HbA: α2β2) during development. BCL11A binds at a cognate recognition site (TGACCA) in the γ-globin gene promoter and represses its expression. DNA-binding is mediated by a triple zinc finger domain, designated ZnF456. Here, we report comprehensive investigation of ZnF456, leveraging X-ray crystallography and NMR to determine the structures in both the presence and absence of DNA. We delve into the dynamics and mode of interaction with DNA. Moreover, we discovered that the last zinc finger of BCL11A (ZnF6) plays a different role compared to ZnF4 and 5, providing a positive entropic contribution to DNA binding and γ-globin gene repression. Comprehending the DNA binding mechanism of BCL11A opens avenues for the strategic, structure-based design of novel therapeutics targeting sickle cell disease and β-thalassemia.

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Protein

Chemical

Disease

Primary Citation of related structures
8TLO