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Multifunctional transcription factor with different regions mediating its different effects. Acts by binding (via its C-terminal domain) to sequences related to the consensus octamer motif 5'-ATGCAAAT-3' in the regulatory regions of its target genes. Regulates the expression of specific genes involved in differentiation and survival within a subset of neuronal lineages. It has been shown that activation of some of these genes requires its N-terminal domain, maybe through a neuronal-specific cofactor. Ativates BCL2 expression and protects neuronal cells from apoptosis (via the N-terminal domain). Induces neuronal process outgrowth and the coordinate expression of genes encoding synaptic proteins. Exerts its major developmental effects in somatosensory neurons and in brainstem nuclei involved in motor control. Stimulates the binding affinity of the nuclear estrogene receptor ESR1 to DNA estrogen response element (ERE), and hence modulates ESR1-induced transcriptional activity. May positively regulate POU4F2 and POU4F3. Regulates dorsal root ganglion sensory neuron specification and axonal projection into the spinal cord. Plays a role in TNFSF11-mediated terminal osteoclast differentiation. Negatively regulates its own expression interacting directly with a highly conserved autoregulatory domain surrounding the transcription initiation site.; Able to act as transcription factor, cannot regulate the expression of the same subset of genes than isoform 1. Does not have antiapoptotic effect on neuronal cells.
基因功能參考文獻(xiàn):
We report a case of a nine-year-old male who presented with facial nerve stimulation four years after cochlear implantation. A dilated internal auditory meatus was revealed. Genetic analysis demonstrated X-linked deafness type 2 (DFNX2) caused by a novel c.769C T nucleotide change in the POU domain, class 3, transcription factor 4 gene PMID: 27863625
Brn3a cooperates with activated RAS/RAF signalling by reducing oncogene-induced senescence in melanocytic tumourigenesis. PMID: 23666755
Data indicate that median methylation levels of BCAN, HOXD1, KCTD8, KLF11, NXPH1, POU4F1, SIM1, and TCF7L1 were >/=30% higher than in normal samples, representing potential biomarkers for tumor diagnosis. PMID: 22930747
PoU4F1 is highly expressed in t(8;21) samples, with AML/ETO appearning to promote some BRN3A expression PMID: 22064348
BRN3A possesses anti-apoptotic property, and considering the above results, it may be regarded as the key component in promoting tumorigenic growth in the uterine cervical cells. PMID: 21928122
Ewing sarcoma induce expression of neuronal markers such as BRN3A showing that the function of those same markers may be restricted or controlled in an sarcoma-dependent manner. PMID: 20348952
Dysregulation of POU4F1 is associated with t(8;21) acute myeloid leukemia. PMID: 20376082
genomic organization of the Brn-3a locus and the mechanisms that control the expression of two different proteins from one genomic locus PMID: 12427558
Measurement of Brn-3a levels in smears can be used to detect a significant proportion of cervical lesions that were missed by Pap smear. PMID: 12893201
These results indicate that Brn-3a could play an important role in the near future in improving cervical cancer screening. PMID: 12911730
oncogenic rearrangement of EWS to produce EWS/Fli-1 may enhance the antiapoptotic effect of Brn-3a and inhibit its ability to promote neuronal differentiation. PMID: 15021903
Hsp27 expression and cell survival are regulated by the POU transcription factor Brn3a PMID: 15272315
Brn-3a has a role in differential regulation of different human papilloma virus variants PMID: 16247485
Upregulation of Brn-3a is associated with prostate cancer PMID: 16276351
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亞細(xì)胞定位:
Nucleus. Cytoplasm.
蛋白家族:
POU transcription factor family, Class-4 subfamily
組織特異性:
Expressed in the brain and the retina. Present in the developing brain, spinal cord and eye.