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Overview

Uniprot IDP61980
Protein NameHeterogeneous nuclear ribonucleoprotein K
Gene NameHnrnpk
OrganismRattus norvegicus

Kla Sites from experimental identification

Position Flanking peptide
163 AGGIIGVKGAKIKEL
198 RVVLIGGKPDRVVEC
219 LISESPIKGRAQPYD
34 MEEEQAFKRSRNTDE
405 LAGSIIGKGGQRIKQ
52 LRILLQSKNAGAVIG
60 NAGAVIGKGGKNIKA

Function

One of the major pre-mRNA-binding proteins. Binds tenaciously to poly(C) sequences. Likely to play a role in the nuclear metabolism of hnRNAs, particularly for pre-mRNAs that contain cytidine-rich sequences. Can also bind poly(C) single-stranded DNA. Plays an important role in p53/TP53 response to DNA damage, acting at the level of both transcription activation and repression. When sumoylated, acts as a transcriptional coactivator of p53/TP53, playing a role in p21/CDKN1A and 14-3-3 sigma/SFN induction. As far as transcription repression is concerned, acts by interacting with long intergenic RNA p21 (lincRNA-p21), a non-coding RNA induced by p53/TP53. This interaction is necessary for the induction of apoptosis, but not cell cycle arrest. As part of a ribonucleoprotein complex composed at least of ZNF827, HNRNPL and the circular RNA circZNF827 that nucleates the complex on chromatin, may negatively regulate the transcription of genes involved in neuronal differentiation (By similarity)

Protein Sequence

10 METEQPEETF 20 PNTETNGEFG 30 KRPAEDMEEE 40 QAFKRSRNTD 50 EMVELRILLQ 60 SKNAGAVIGK 70 GGKNIKALRT 80 DYNASVSVPD 90 SSGPERILSI 100 SADIETIGEI 110 LKKIIPTLEE 120 GLQLPSPTAT 130 SQLPLESDAV 140 ECLNYQHYKG 150 SDFDCELRLL 160 IHQSLAGGII 170 GVKGAKIKEL 180 RENTQTTIKL 190 FQECCPHSTD 200 RVVLIGGKPD 210 RVVECIKIIL 220 DLISESPIKG 230 RAQPYDPNFY 240 DETYDYGGFT 250 MMFDDRRGRP 260 VGFPMRGRGG 270 FDRMPPGRGG 280 RPMPPSRRDY 290 DDMSPRRGPP 300 PPPPGRGGRG 310 GSRARNLPLP 320 PPPPPRGGDL 330 MAYDRRGRPG 340 DRYDGMVGFS 350 ADETWDSAID 360 TWSPSEWQMA 370 YEPQGGSGYD 380 YSYAGGRGSY 390 GDLGGPIITT 400 QVTIPKDLAG 410 SIIGKGGQRI 420 KQIRHESGAS 430 IKIDEPLEGS 440 EDRIITITGT 450 QDQIQNAQYL 460 LQNSVKQYSG KFF

Gene Ontology

Classification GO ID Description
Cellular Component GO:0043679 axon terminus
Cellular Component GO:0071013 catalytic step 2 spliceosome
Cellular Component GO:0005938 cell cortex
Cellular Component GO:0000785 chromatin
Cellular Component GO:0005737 cytoplasm
Cellular Component GO:0010494 cytoplasmic stress granule
Cellular Component GO:0043197 dendritic spine
Cellular Component GO:0098978 glutamatergic synapse
Cellular Component GO:0005654 nucleoplasm
Cellular Component GO:0005634 nucleus
Cellular Component GO:0002102 podosome
Cellular Component GO:0098794 postsynapse
Cellular Component GO:0032993 protein-DNA complex
Cellular Component GO:1990904 ribonucleoprotein complex
Molecular Function GO:0042805 actinin binding
Molecular Function GO:0051117 ATPase binding
Molecular Function GO:1990829 C-rich single-stranded DNA binding
Molecular Function GO:0000987 cis-regulatory region sequence-specific DNA binding
Molecular Function GO:0003690 double-stranded DNA binding
Molecular Function GO:0031072 heat shock protein binding
Molecular Function GO:0042802 identical protein binding
Molecular Function GO:0005521 lamin binding
Molecular Function GO:0106222 lncRNA binding
Molecular Function GO:0003730 mRNA 3'-UTR binding
Molecular Function GO:0003729 mRNA binding
Molecular Function GO:1990715 mRNA CDS binding
Molecular Function GO:0030628 pre-mRNA 3'-splice site binding
Molecular Function GO:0019904 protein domain specific binding
Molecular Function GO:0043021 ribonucleoprotein complex binding
Molecular Function GO:0003723 RNA binding
Molecular Function GO:0003697 single-stranded DNA binding
Biological Process GO:0006953 acute-phase response
Biological Process GO:0043010 camera-type eye development
Biological Process GO:0071230 cellular response to amino acid stimulus
Biological Process GO:1904322 cellular response to forskolin
Biological Process GO:0071333 cellular response to glucose stimulus
Biological Process GO:0032869 cellular response to insulin stimulus
Biological Process GO:0071284 cellular response to lead ion
Biological Process GO:0072752 cellular response to rapamycin
Biological Process GO:0021549 cerebellum development
Biological Process GO:0021987 cerebral cortex development
Biological Process GO:0006351 DNA-templated transcription
Biological Process GO:0021766 hippocampus development
Biological Process GO:0001822 kidney development
Biological Process GO:0001889 liver development
Biological Process GO:0030324 lung development
Biological Process GO:0008584 male gonad development
Biological Process GO:0050804 modulation of chemical synaptic transmission
Biological Process GO:0006397 mRNA processing
Biological Process GO:0043066 negative regulation of apoptotic process
Biological Process GO:2000173 negative regulation of branching morphogenesis of a nerve
Biological Process GO:0045892 negative regulation of DNA-templated transcription
Biological Process GO:0010629 negative regulation of gene expression
Biological Process GO:0048025 negative regulation of mRNA splicing, via spliceosome
Biological Process GO:0000122 negative regulation of transcription by RNA polymerase II
Biological Process GO:0001541 ovarian follicle development
Biological Process GO:0007422 peripheral nervous system development
Biological Process GO:1903861 positive regulation of dendrite extension
Biological Process GO:0060999 positive regulation of dendritic spine development
Biological Process GO:1900273 positive regulation of long-term synaptic potentiation
Biological Process GO:1905581 positive regulation of low-density lipoprotein particle clearance
Biological Process GO:0031643 positive regulation of myelination
Biological Process GO:0010976 positive regulation of neuron projection development
Biological Process GO:2000010 positive regulation of protein localization to cell surface
Biological Process GO:0033120 positive regulation of RNA splicing
Biological Process GO:0090129 positive regulation of synapse maturation
Biological Process GO:0050806 positive regulation of synaptic transmission
Biological Process GO:0045944 positive regulation of transcription by RNA polymerase II
Biological Process GO:0060816 random inactivation of X chromosome
Biological Process GO:1902165 regulation of intrinsic apoptotic signaling pathway in response to DNA damage by p53 class mediator
Biological Process GO:0048024 regulation of mRNA splicing, via spliceosome
Biological Process GO:0099175 regulation of postsynapse organization
Biological Process GO:0006357 regulation of transcription by RNA polymerase II
Biological Process GO:0031048 regulatory ncRNA-mediated heterochromatin formation
Biological Process GO:0014823 response to activity
Biological Process GO:1902074 response to salt
Biological Process GO:0008380 RNA splicing
Biological Process GO:0048538 thymus development

Reference

[1] Sheng L, Xu H, Wang Y, Ni J, Xiang T et al.. Systematic analysis of lysine lactylation in nucleus pulposus cells.. iScience 27(11):111157. 2024 Nov 15. PMID: 39524337.

[2] Chen Y, Sun W, Sun Z, Zhao H, Wu T et al.. Effect of electroacupuncture on hippocampal protein lactylation in a rat model of vascular dementia.. Front Neurol 16:1629474. 2025. PMID: 40963935.