GrassTFDB :: Browse Family::Rice

Displaying CCAAT-HAP5 Family from Rice


The CCAAT motif is found in the promoters of many eukaryotic genes. In yeast a single complex of three proteins termed HAP2 HAP3 and HAP5 binds to this sequence and in mammals the three components of the equivalent complex (called variously NF-Y CBF or CP1) are also represented by single genes. Here we report the presence of multiple genes for each of the components of the CCAAT-binding complex HAP2 35 from Arabidopsis. Three independent Arabidopsis HAP subunit 2 (AtHAP2) cDNAs were cloned by functional complementation of a yeast hap2 mutant and two independent forms each of AtHAP3 and AtHAP5 cDNAs were detected in the expressed sequence tag database. Additional homologs (two of AtHAP3 and one of AtHAP5) have been identified from available Arabidopsis genomic sequences. Northern-blot analysis indicated ubiquitous expression for each AtHAP2 and AtHAP5 cDNA in a range of tissues whereas expression of each AtHAP3 cDNA was under developmental and/or environmental regulation. The unexpected presence of multiple forms of each HAP homolog in Arabidopsis compared with the single genes in yeast and vertebrates suggests that the HAP235 complex may play diverse roles in gene transcription in higher plants.

Protein Name
accepted / suggested
Gene Locus Synonym/
Gene Name
Clone in TFome Genome Browser
OsCA5P1 LOC_Os01g01290 View in Browser
OsCA5P2 LOC_Os01g08790 View in Browser
OsCA5P3 LOC_Os01g24460 View in Browser
OsCA5P4 LOC_Os01g39850 View in Browser
OsCA5P5 LOC_Os02g07450 View in Browser
OsCA5P6 LOC_Os03g14669 View in Browser
OsCA5P7 LOC_Os03g51200 View in Browser
OsCA5P8 LOC_Os03g63530 View in Browser
OsCA5P9 LOC_Os04g58680 View in Browser
OsCA5P10 LOC_Os05g23910 View in Browser
OsCA5P11 LOC_Os05g41450 View in Browser
OsCA5P12 LOC_Os06g45640 View in Browser
OsCA5P13 LOC_Os07g36130 View in Browser
OsCA5P14 LOC_Os07g36140 pUT1186 View in Browser
OsCA5P15 LOC_Os08g10560 View in Browser
OsCA5P16 LOC_Os08g33100 View in Browser
OsCA5P17 LOC_Os08g38780 View in Browser
OsCA5P18 LOC_Os09g30310 View in Browser
OsCA5P19 LOC_Os10g11580 View in Browser
OsCA5P20 LOC_Os11g34200 pUT1233 View in Browser
OsCA5P21 LOC_Os12g25120 View in Browser
OsCA5P22 LOC_Os12g34510 View in Browser