Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 19.22 kDa 
• Atom Count: 1,234 
• Modelled Residue Count: 116 
• Deposited Residue Count: 124 
• Unique protein chains: 1
• Unique nucleic acid chains: 2

 1LO1

ESTROGEN RELATED RECEPTOR 2 DNA BINDING DOMAIN IN COMPLEX WITH DNA

• PDB DOI: 10.2210/pdb1LO1/pdb
• NDB: 1LO1
• BMRB: 5363

• Classification: HORMONE/GROWTH FACTOR RECEPTOR/DNA
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2002-05-05 Released: 2003-04-22 
• Deposition Author(s): Gearhart, M.D., Holmbeck, S.M.A., Evans, R.M., Dyson, H.J., Wright, P.E.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 32 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Literature

Monomeric Complex of Human Orphan Estrogen Related Receptor-2 with DNA: A Pseudo-dimer Interface Mediates Extended Half-site Recognition

Gearhart, M.D., Holmbeck, S.M.A., Evans, R.M., Dyson, H.J., Wright, P.E.

(2003) J Mol Biol 327: 819-832

• PubMed: 12654265 
• DOI: 10.1016/s0022-2836(03)00183-9
• Primary Citation of Related Structures:  
  1LO1


• PubMed Abstract: 
  

While most nuclear receptors bind DNA as homo or heterodimers, the human estrogen related receptors (hERRs) are members of a subfamily of orphan receptors that bind DNA as monomers. We have determined the solution structure of the DNA binding domain (DBD) of hERR2 bound to its cognate DNA. The structure and base interactions of the core DBD are similar to those of other nuclear receptors. However, high-affinity, sequence-specific DNA binding as a monomer necessitates formation of additional base contacts outside the core DBD. This is accomplished using a modified guanosine-binding "AT-hook" within the C-terminal extension (CTE) flanking the DBD, which makes base-specific minor groove interactions. The structure of the CTE is stabilized both by interactions with the DNA and by packing against a region of the core DBD normally reserved for dimerization. This pseudo-dimer interface provides a basis for the expansion of DNA recognition and suggests a mechanism through which dimerization may have evolved from an ancestral monomeric receptor.

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Organizational Affiliation: 

Department of Molecular Biology and Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.

Macromolecules

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Steroid hormone receptor ERR2	C [auth A]	98	Homo sapiens	Mutation(s): 1  Gene Names: hERR2, ESRRB, ERRB2, ESRL2, NR3B2
UniProt & NIH Common Fund Data Resources
Find proteins for O95718 (Homo sapiens) Explore O95718  Go to UniProtKB:  O95718
PHAROS:  O95718

Entity ID: 1
Molecule	Chains	Length	Organism	Image
5'-D(*GP*CP*TP*CP*AP*AP*GP*GP*TP*CP*AP*CP*G)-3'	A [auth B]	13	N/A

Entity ID: 2
Molecule	Chains	Length	Organism	Image
5'-D(*CP*GP*TP*GP*AP*CP*CP*TP*TP*GP*AP*GP*C)-3'	B [auth C]	13	N/A

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ZN	D [auth A], E [auth A]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
DNA	PDBBind:  1LO1	Kd: 7.1 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 32 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2003-04-22 
Deposition Author(s): Gearhart, M.D., Holmbeck, S.M.A., Evans, R.M., Dyson, H.J., Wright, P.E.

Revision History  

• Version 1.0: 2003-04-22
  Type: Initial release
  
• Version 1.1: 2008-04-28
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2021-10-27
  Changes: Database references, Derived calculations