7FDO image
Deposition Date 2021-07-17
Release Date 2022-07-20
Last Version Date 2024-11-13
Entry Detail
PDB ID:
7FDO
Keywords:
Title:
Crystal structure of transcription factor CPC in complex with EGL3
Biological Source:
Source Organism:
Method Details:
Experimental Method:
Resolution:
1.75 Å
R-Value Free:
0.22
R-Value Work:
0.19
R-Value Observed:
0.19
Space Group:
C 1 2 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Transcription factor EGL1
Gene (Uniprot):BHLH2
Chain IDs:A
Chain Length:198
Number of Molecules:1
Biological Source:Arabidopsis thaliana
Polymer Type:polypeptide(L)
Molecule:Transcription factor CPC
Gene (Uniprot):CPC
Chain IDs:B
Chain Length:59
Number of Molecules:1
Biological Source:Arabidopsis thaliana
Primary Citation
Structural insights into partner selection for MYB and bHLH transcription factor complexes.
Nat.Plants 8 1108 1117 (2021)
PMID: 35995835 DOI: 10.1038/s41477-022-01223-w

Abstact

MYB and basic helix-loop-helix (bHLH) transcription factors form complexes to regulate diverse metabolic and developmental processes in plants. However, the molecular mechanisms responsible for MYB-bHLH interaction and partner selection remain unclear. Here, we report the crystal structures of three MYB-bHLH complexes (WER-EGL3, CPC-EGL3 and MYB29-MYC3), uncovering two MYB-bHLH interaction modes. WER and CPC are R2R3- and R3-type MYBs, respectively, but interact with EGL3 through their N-terminal R3 domain in a similar mode. A single amino acid of CPC, Met49, is crucial for competition with WER to interact with EGL3. MYB29, a R2R3-type MYB transcription factor, interacts with MYC3 by its C-terminal MYC-interaction motif. The WER-EGL3 and MYB29-MYC3 binding modes are widely applied among MYB-bHLH complexes in Arabidopsis and evolve independently in plants.

Legend

Protein

Chemical

Disease

Primary Citation of related structures