CPP Transcription Factor Family
Nodulin genes are specifically expressed in the nitrogen-fixing root nodules. We have identified a
novel type of DNA-binding protein (CPP1) interacting with the promoter of the soybean leghemoglobin
gene Gmlbc3. The DNA-binding domain of CPP1 contains two similar Cys-rich domains with 9 and 10
Cys, respectively. Genes encoding similar domains have been identified in Arabidopsis thaliana,
Caenorhabditis elegans, the mouse, and human. The domains also have some homology to a Cys-rich
region present in some polycomb proteins. The cpp1 gene is induced late in nodule development and
the expression is confined to the distal part of the central infected tissue of the nodule. A
constitutively expressed cpp1 gene reduces the expression of a Gmlbc3 promoter-gusA reporter
construct in Vicia hirsuta roots. These data therefore suggest that CPP1 might be involved in the
regulation of the leghemoglobin genes in the symbiotic root nodule.
(taken from TOBFAC).
16 putative CPP TF sequences,
blast HSP, and gene level multiple sequence
alignment in Legume TFKB.
16 CXC domain peptide sequences and alignment
and phylogeny tree.
5 CPP sequences with annotations for soybean
in PlantTFDB. All
partial
sequences.
Last updated by Dr. Jeff Chen on July 15, 2009.
