PlantRegMap/PlantTFDB v5.0
Plant Transcription Factor Database
Previous version: v3.0 v4.0
Azadirachta indica
NF-YB Family
Species TF ID Description
Neem_10472_f_3NF-YB family protein
Neem_1059_f_2NF-YB family protein
Neem_10966_f_2NF-YB family protein
Neem_12802_f_2NF-YB family protein
Neem_19782_f_1NF-YB family protein
Neem_2114_f_4NF-YB family protein
Neem_27032_f_1NF-YB family protein
Neem_30289_f_1NF-YB family protein
Neem_354_f_2NF-YB family protein
Neem_4191_f_1NF-YB family protein
Neem_4906_f_1NF-YB family protein
Neem_5905_f_1NF-YB family protein
Neem_6074_f_1NF-YB family protein
Neem_6689_f_1NF-YB family protein
Neem_696_f_5NF-YB family protein
Neem_797_f_1NF-YB family protein
Neem_9242_f_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