PlantTFDB
Plant Transcription Factor Database
v4.0
Previous version: v1.0, v2.0, v3.0
Spirodela polyrhiza
bZIP Family
Species TF ID Description
Spipo0G0078600bZIP family protein
Spipo0G0129900bZIP family protein
Spipo11G0011300bZIP family protein
Spipo11G0041100bZIP family protein
Spipo11G0044300bZIP family protein
Spipo12G0036200bZIP family protein
Spipo12G0039800bZIP family protein
Spipo13G0002500bZIP family protein
Spipo13G0002700bZIP family protein
Spipo13G0007200bZIP family protein
Spipo13G0014300bZIP family protein
Spipo14G0024100bZIP family protein
Spipo15G0021000bZIP family protein
Spipo15G0039600bZIP family protein
Spipo16G0022200bZIP family protein
Spipo18G0024600bZIP family protein
Spipo19G0011300bZIP family protein
Spipo1G0060600bZIP family protein
Spipo20G0029600bZIP family protein
Spipo21G0004000bZIP family protein
Spipo22G0018400bZIP family protein
Spipo26G0011000bZIP family protein
Spipo26G0021600bZIP family protein
Spipo28G0024500bZIP family protein
Spipo29G0002200bZIP family protein
Spipo29G0004400bZIP family protein
Spipo29G0013700bZIP family protein
Spipo2G0055800bZIP family protein
Spipo2G0112100bZIP family protein
Spipo32G0007700bZIP family protein
Spipo3G0004200bZIP family protein
Spipo3G0017700bZIP family protein
Spipo3G0021500bZIP family protein
Spipo3G0024500bZIP family protein
Spipo3G0080800bZIP family protein
Spipo3G0094100bZIP family protein
Spipo4G0008600bZIP family protein
Spipo4G0018300bZIP family protein
Spipo4G0088300bZIP family protein
Spipo4G0111500bZIP family protein
Spipo6G0032300bZIP family protein
Spipo6G0049900bZIP family protein
Spipo6G0055300bZIP family protein
Spipo6G0075600bZIP family protein
Spipo7G0034500bZIP family protein
Spipo8G0029700bZIP family protein
Spipo8G0044800bZIP family protein
Spipo8G0054900bZIP family protein
bZIP Family Introduction

The bZIP domain consists of two structural features located on a contiguous alpha-helix: first, a basic region of ~ 16 amino acid residues containing a nuclear localization signal followed by an invariant N-x7-R/K motif that contacts the DNA; and, second, a heptad repeat of leucines or other bulky hydrophobic amino acids positioned exactly nine amino acids towards the C-terminus, creating an amphipathic helix. To bind DNA, two subunits adhere via interactions between the hydrophobic sides of their helices, which creates a superimposing coiled-coil structure. The ability to form homo- and heterodimers is influenced by the electrostatic attraction and repulsion of polar residues flanking the hydrophobic interaction surface of the helices.

Plant bZIP proteins preferentially bind to DNA sequences with an ACGT core. Binding specificity is regulated by flanking nucleotides. Plant bZIPs preferentially bind to the A-box (TACGTA), C-box (GACGTC) and G-box (CACGTG), but there are also examples of nonpalindromic binding sites.

Jakoby M, Weisshaar B, Droge-Laser W, Vicente-Carbajosa J, Tiedemann J, Kroj T, Parcy F
bZIP transcription factors in Arabidopsis.
Trends Plant Sci, 2002. 7(3): p. 106-11.
PMID: 11906833