CPP Genomic sequences

Minimum number of tobacco CPP genes: 3

Count of tobacco CPP sequences: 4

Pfam accession: CXC

SHOULD possess CXC domain

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.


Cvitanich, C; Pallisgaard, N; Nielsen, KA; Hansen, AC; Larsen, K; Pihakaski-Maunsbach, K; Marcker, KA; Jensen, EO. CPP1, a DNA-binding protein involved in the expression of a soybean leghemoglobin c3 gene. Proc. Natl. Acad. Sci. U.S.A. 2000. 97(14):8163-8 PMID: 10859345

Number of contigs: 3

Number of singlets: 2

Number of N terminal – 1

Number of C terminal – 2

Number of full – 1

Total minimum number – 3

Search sequences and info

Transcription factor sequences
CPP_1 [comment=N terminal] ET051745
CPP_2 [comment=C terminal] ET042794
CPP_3 [comment=full] ET049613
CPP_4 [comment=C terminal] ET051120

Tobacco published genes related to transcription factor family CPP
Family Genbank ID Name
Authors of this site:

Paul J Rushton
Marta T. Bokowiec
Xianfeng (Jeff) Chen
Thomas (Tom) W Laudeman
Jennifer F. Brannock
Michael P. Timko