Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 28.33 kDa 
• Atom Count: 2,156 
• Modelled Residue Count: 185 
• Deposited Residue Count: 185 
• Unique protein chains: 2
• Unique nucleic acid chains: 2

 2WT7

Crystal structure of the bZIP heterodimeric complex MafB:cFos bound to DNA

• PDB DOI:  https://doi.org/10.2210/pdb2WT7/pdb
• NDB: NA0777

• Classification: TRANSCRIPTION
• Organism(s): Mus musculus, synthetic construct
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2009-09-11 Released: 2010-09-29 
• Deposition Author(s): Pogenberg, V., Holton, S., Wilmanns, M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.256 
• R-Value Work: 0.228 
• R-Value Observed: 0.230 

Literature

Design of a bZIP Transcription Factor with Homo/Heterodimer-Induced DNA-Binding Preference.

Pogenberg, V., Consani Textor, L., Vanhille, L., Holton, S.J., Sieweke, M.H., Wilmanns, M.

(2014) Structure 22: 466

• PubMed: 24530283 
• DOI: https://doi.org/10.1016/j.str.2013.12.017
• Primary Citation of Related Structures:  
  2WT7, 2WTY


• PubMed Abstract: 
  

The ability of basic leucine zipper transcription factors for homo- or heterodimerization provides a paradigm for combinatorial control of eukaryotic gene expression. It has been unclear, however, how facultative dimerization results in alternative DNA-binding repertoires on distinct regulatory elements. To unravel the molecular basis of such coupled preferences, we determined two high-resolution structures of the transcription factor MafB as a homodimer and as a heterodimer with c-Fos bound to variants of the Maf-recognition element. The structures revealed several unexpected and dimer-specific coiled-coil-heptad interactions. Based on these findings, we have engineered two MafB mutants with opposite dimerization preferences. One of them showed a strong preference for MafB/c-Fos heterodimerization and enabled selection of heterodimer-favoring over homodimer-specific Maf-recognition element variants. Our data provide a concept for transcription factor design to selectively activate dimer-specific pathways and binding repertoires.

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Organizational Affiliation: 

EMBL Hamburg c/o DESY, Notkestraße 85, 22603 Hamburg, Germany. Electronic address: [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTO-ONCOGENE PROTEIN C-FOS	A	63	Mus musculus	Mutation(s): 0  Gene Names: Fos
UniProt & NIH Common Fund Data Resources
Find proteins for P01101 (Mus musculus) Explore P01101  Go to UniProtKB:  P01101
IMPC:  MGI:95574

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
TRANSCRIPTION FACTOR MAFB	B	90	Mus musculus	Mutation(s): 1  Gene Names: Mafb, Krml, Maf1
UniProt
Find proteins for P54841 (Mus musculus) Explore P54841  Go to UniProtKB:  P54841

Entity ID: 3
Molecule	Chains	Length	Organism	Image
MODIFIED T-MARE MOTIF	C	16	synthetic construct

Entity ID: 4
Molecule	Chains	Length	Organism	Image
MODIFIED T-MARE MOTIF	D	16	synthetic construct

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PO4	E [auth C]	PHOSPHATE ION O4 P NBIIXXVUZAFLBC-UHFFFAOYSA-K

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.256 
• R-Value Work: 0.228 
• R-Value Observed: 0.230 
• Space Group: P 6₂

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 146.676	α = 90
b = 146.676	β = 90
c = 51.117	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
SHELXD	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2010-09-29 
Deposition Author(s): Pogenberg, V., Holton, S., Wilmanns, M.

Revision History  

• Version 1.0: 2010-09-29
  Type: Initial release
  
• Version 1.1: 2014-02-05
  Changes: Database references, Source and taxonomy, Version format compliance
• Version 1.2: 2014-02-26
  Changes: Database references
• Version 1.3: 2014-03-19
  Changes: Database references
• Version 1.4: 2019-07-17
  Changes: Data collection