Plant Transcription Factor Database
Previous version: v3.0
Ipomoea trifida
NF-YB Family
Species TF ID Description
Itr_sc000044.1_g00042.1NF-YB family protein
Itr_sc000057.1_g00043.1NF-YB family protein
Itr_sc000085.1_g00011.1NF-YB family protein
Itr_sc000094.1_g00002.1NF-YB family protein
Itr_sc000111.1_g00067.1NF-YB family protein
Itr_sc000138.1_g00005.1NF-YB family protein
Itr_sc000194.1_g00015.1NF-YB family protein
Itr_sc000246.1_g00025.1NF-YB family protein
Itr_sc000246.1_g00026.1NF-YB family protein
Itr_sc000249.1_g00020.1NF-YB family protein
Itr_sc000433.1_g00013.1NF-YB family protein
Itr_sc000438.1_g00019.1NF-YB family protein
Itr_sc000449.1_g00012.1NF-YB family protein
Itr_sc000542.1_g00002.1NF-YB family protein
Itr_sc000559.1_g00009.1NF-YB family protein
Itr_sc000568.1_g00007.1NF-YB family protein
Itr_sc000875.1_g00004.1NF-YB family protein
Itr_sc000948.1_g00003.1NF-YB family protein
Itr_sc000950.1_g00001.1NF-YB family protein
Itr_sc000950.1_g00002.1NF-YB family protein
Itr_sc000950.1_g00003.1NF-YB family protein
Itr_sc001155.1_g00005.1NF-YB family protein
Itr_sc001819.1_g00005.1NF-YB family protein
Itr_sc002395.1_g00001.1NF-YB family protein
Itr_sc004286.1_g00004.1NF-YB family protein
Itr_sc004991.1_g00002.1NF-YB family protein
Itr_sc014441.1_g00001.1NF-YB family protein
NF-YB Family Introduction

NF-Y transcription factors are likely found in all eukaryotes and have roles in the regulation of diverse genes (McNabb et al., 1995; Edwards et al., 1998; Maity and de Crombrugghe, 1998; Mantovani, 1999). In mammals, where their biochemistry is well described, the NF-Y transcription factor complex is composed of three unique subunits: NF-YA, NF-YB, and NF-YC. Assembly of the NF-Y heterotrimer in mammals follows a strict, stepwise pattern (Sinha et al., 1995, 1996). Initially, a heterodimer is formed in the cytoplasm between the subunits NF-YB and NF-YC. This dimer then translocates to the nucleus, where the third subunit, NF-YA, is recruited to generate the mature, heterotrimeric NF-Y transcription factor (Frontini et al., 2004; Kahle et al., 2005). Mature NF-Y binds promoters with the core pentamer nucleotide sequence CCAAT, and this can result in either positive or negative transcriptional regulation(Peng and Jahroudi, 2002, 2003; Ceribelli et al., 2008).

As with NF-YA, NF-YB and NF-YC families have well-described subunit interaction and DNA-binding domains ( Kim et al., 1996; Sinha et al., 1996; McNabb et al., 1997; Romier et al., 2003). The conserved regions of NF-YB and NF-YC have structural and amino acid homology to histone fold motifs. Specifically, NF-YB is related to the histone fold motifs of H2B histones, while NF-YC subunits are related to H2A histones (Mantovani, 1999).

Siefers N, Dang KK, Kumimoto RW, Bynum WE 4th, Tayrose G, Holt BF 3rd.
Tissue-specific expression patterns of Arabidopsis NF-Y transcription factors suggest potential for extensive combinatorial complexity.
Plant Physiol, 2009. 149(2): p. 625-41.
PMID: 19019982