PlantRegMap/PlantTFDB v5.0
Plant Transcription Factor Database
Previous version: v3.0 v4.0
Citrus sinensis
NF-YB Family
Species TF ID Description
orange1.1g026469mNF-YB family protein
orange1.1g027605mNF-YB family protein
orange1.1g030547mNF-YB family protein
orange1.1g030627mNF-YB family protein
orange1.1g030647mNF-YB family protein
orange1.1g030670mNF-YB family protein
orange1.1g030714mNF-YB family protein
orange1.1g030812mNF-YB family protein
orange1.1g031569mNF-YB family protein
orange1.1g031591mNF-YB family protein
orange1.1g031594mNF-YB family protein
orange1.1g031627mNF-YB family protein
orange1.1g031641mNF-YB family protein
orange1.1g032293mNF-YB family protein
orange1.1g032773mNF-YB family protein
orange1.1g032777mNF-YB family protein
orange1.1g032845mNF-YB family protein
orange1.1g033230mNF-YB family protein
orange1.1g033282mNF-YB family protein
orange1.1g033283mNF-YB family protein
orange1.1g034435mNF-YB family protein
orange1.1g036580mNF-YB family protein
orange1.1g038014mNF-YB family protein
orange1.1g038325mNF-YB family protein
orange1.1g044287mNF-YB family protein
orange1.1g045194mNF-YB family protein
orange1.1g045289mNF-YB family protein
orange1.1g047516mNF-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