Detailed gene information

Genes [306]




HUB2
HISTONE MONO-UBIQUITINATION 2
TAIR: AT1G55250
UNIPROT: Q9C895
NOWOMICS: View List

Publications

Liu Y et al., 2007, Plant Cell
Cao Y et al., 2008, Plant Cell
Gu X et al., 2009, Plant J.
Xu L et al., 2009, Plant J.
Zou B et al., 2014, Plant Physiol.

Appears in the following schemes

FLC regulation through protein complexes
General processes & autonomous pathway

Protein function

Encodes an E3 ubiquitin ligase involed in monoubiquitination of H2B.

Phenotype

Remarks:
hub1 and hub2 mutations do not lead to additive flowering-time phenotypes. [Gu et al., 2009][Cao et al., 2008]

Single mutant:
hub2 single mutant is early flowering under both SD and LD conditions. [Gu et al., 2009][Cao et al., 2008][Dhawan et al., 2009]

Function:
E3 ubiquitin-protein ligase that monoubiquitinates H2B to form H2BK143ub1. H2BK143ub1 gives a specific tag for epigenetic transcriptional activation and is also prerequisite for H3K4me and maybe H3K79me. It thereby plays a central role in histone code and gene regulation. Forms a ubiquitin ligase complex in cooperation with the E2 enzyme UBC2/RAD6. [Data from UniProt]

Regulators, targets and interactors

Downstream actors


Upstream actors


Protein-protein interactions

UBC1 -- [Cao et al., 2008] -- [View TAIR record]

UBC2 -- [Cao et al., 2008] -- [View TAIR record]


HUB1 -- [Cao et al., 2008] -- [View TAIR record]



HUB2 interaction network

Downstream and upstream flowering-related genes

Physical interactions with other flowering-related proteins