PlantRegMap/PlantTFDB v5.0
Plant Transcription Factor Database
Previous version: v3.0 v4.0
Pyrus communis
NF-YB Family
Species TF ID Description
PCP001420.1NF-YB family protein
PCP001525.1NF-YB family protein
PCP001883.1NF-YB family protein
PCP002001.1NF-YB family protein
PCP002299.1NF-YB family protein
PCP003536.1NF-YB family protein
PCP003930.1NF-YB family protein
PCP005564.1NF-YB family protein
PCP005566.1NF-YB family protein
PCP012340.1NF-YB family protein
PCP013570.1NF-YB family protein
PCP016853.1NF-YB family protein
PCP019450.1NF-YB family protein
PCP020369.1NF-YB family protein
PCP021391.1NF-YB family protein
PCP024490.1NF-YB family protein
PCP026889.1NF-YB family protein
PCP031488.1NF-YB family protein
PCP036037.1NF-YB family protein
PCP042870.1NF-YB family protein
PCP043576.1NF-YB family protein
PCP044035.1NF-YB family protein
PCP044133.1NF-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