NFX1

MHC class II gene expression is controlled primarily at the transcriptional level by transcription factors that bind to the X and Y boxes, two highly conserved elements in the proximal promoter of MHC class II genes. The protein encoded by this gene is a transcriptional repressor capable of binding to the conserved X box motif of HLA-DRA and other MHC class II genes in vitro. The protein may play a role in regulating the duration of an inflammatory response by limiting the period in which class II MHC molecules are induced by IFN-gamma. Three alternative splice variants, each of which encodes a different isoform, have been identified. [provided by RefSeq]

Full Name

NFX1

Function

Binds to the X-box motif of MHC class II genes and represses their expression. May play an important role in regulating the duration of an inflammatory response by limiting the period in which MHC class II molecules are induced by interferon-gamma. Isoform 3 binds to the X-box motif of TERT promoter and represses its expression. Together with PABPC1 or PABPC4, isoform 1 acts as a coactivator for TERT expression. Mediates E2-dependent ubiquitination.

Biological Process

Inflammatory responseManual Assertion Based On ExperimentTAS:ProtInc
Negative regulation of MHC class II biosynthetic processIEA:Ensembl
Negative regulation of transcription by RNA polymerase IIManual Assertion Based On ExperimentIDA:NTNU_SB
Protein autoubiquitinationManual Assertion Based On ExperimentIDA:ARUK-UCL
Protein ubiquitinationManual Assertion Based On ExperimentTAS:ARUK-UCL
Regulation of transcription, DNA-templatedManual Assertion Based On ExperimentIBA:GO_Central
Transcription by RNA polymerase IIManual Assertion Based On ExperimentTAS:ProtInc

Cellular Location

Nucleus

PTM

Isoform 3 is polyubiquitinated in the presence of HPV16 E6 protein; which leads to proteasomal degradation. Isoform 1 is not polyubiquitinated.