| HNRNPK Protein | |
|---|---|
| Gene | [HNRNPK](/genes/hnrnpk) |
| UniProt ID | [P61956](https://www.uniprot.org/uniprot/P61956) |
| PDB Structures | 2L6J, 2L6K, 2L7A |
| Molecular Weight | ~51 kDa |
| Subcellular Localization | Nucleus, cytoplasm, nucleolus |
| Protein Family | Heterogeneous nuclear ribonucleoprotein (hnRNP) family |
HNRNPK (Heterogeneous Nuclear Ribonucleoprotein K) is a multifunctional RNA-binding protein that plays critical roles in gene expression regulation, RNA processing, and cellular signaling[1]. As a member of the hnRNP family, HNRNPK is involved in transcriptional and post-transcriptional control of gene expression, with particular importance in neuronal cells. The protein is encoded by the HNRNPK gene and is characterized by its distinctive KH (KH-type RNA-binding) domains that mediate nucleic acid binding specificity[2].
In the nervous system, HNRNPK is essential for neuronal development, synaptic plasticity, and cellular stress responses. Dysregulation of HNRNPK has been implicated in several neurodegenerative diseases, including Alzheimer's disease (AD), Parkinson's disease (PD), and amyotrophic lateral sclerosis (ALS), where alterations in RNA metabolism and protein aggregation are hallmark features[3]. Additionally, HNRNPK overexpression is observed in various cancers, making it a dual-focus therapeutic target[4].
This page covers the protein structure, normal physiological functions, disease associations, and therapeutic targeting strategies for HNRNPK in neurodegeneration.
is a multifunctional RNA-binding protein that plays critical roles in gene expression regulation, RNA processing, and cellular signaling. As a member of the hnRNP family, HNRNPK is involved in transcriptional and post-transcriptional control of gene expression, with particular importance in neuronal cells. The protein is encoded by the HNRNPK gene and is characterized by its distinctive KH (KH-type RNA-binding) domains that mediate nucleic acid binding specificity.
In the nervous system, HNRNPK is essential for neuronal development, synaptic plasticity, and cellular stress responses. Dysregulation of HNRNPK has been implicated in several neurodegenerative diseases, including Alzheimer's disease (AD), Parkinson's disease (PD), and amyotrophic lateral sclerosis (ALS), where alterations in RNA metabolism and protein aggregation are hallmark features. Additionally, HNRNPK overexpression is observed in various cancers, making it a dual-focus therapeutic target.
This page covers the protein structure, normal physiological functions, disease associations, and therapeutic targeting strategies for HNRNPK in neurodegeneration.
HNRNPK (Heterogeneous Nuclear Ribonucleoprotein K) is a KH domain-containing RNA-binding protein characterized by:
The protein functions as a scaffold for multiple signaling complexes and regulates gene expression at transcriptional and post-transcriptional levels.
HNRNPK plays diverse roles in cellular homeostasis:
In the nervous system, HNRNPK is essential for neuronal development, synaptic plasticity, and response to oxidative stress.
Dysregulation of HNRNPK contributes to multiple neurodegenerative disease pathogenesis through distinct mechanisms[3:1].
HNRNPK is frequently overexpressed in various cancers and functions as an oncogene, making it a potential therapeutic target.
| Interactor | Interaction Type | Function |
|---|---|---|
| p53 | Direct binding | Transcriptional co-activation |
| YB-1 | Direct binding | mRNA translation regulation |
| CSDE | Complex formation | RNA processing |
| Akt/PKB | Phosphorylation | Signal transduction |
| ERK1/2 | Phosphorylation | MAPK signaling |
Beyer et al. HNRNPK in neurodegeneration (2023). 2023. ↩︎
Kim et al. HNRNPK and RNA metabolism in AD (2022). 2022. ↩︎
Chen et al. HNRNPK in ALS pathogenesis (2021). 2021. ↩︎ ↩︎