InnateDB: Systems Biology of the Innate Immune Response

Homo sapiens Protein: PLK2

Summary

InnateDB Protein

IDBP-22511.5

Last Modified

2014-10-13 [Report errors or provide feedback]

Gene Symbol

PLK2

Protein Name

polo-like kinase 2

Synonyms

hPlk2; hSNK; SNK;

Species

Homo sapiens

Ensembl Protein

ENSP00000274289

InnateDB Gene

IDBG-22507 (PLK2)

Protein Structure

UniProt Annotation

Function

Tumor suppressor serine/threonine-protein kinase involved in synaptic plasticity, centriole duplication and G1/S phase transition. Polo-like kinases act by binding and phosphorylating proteins are that already phosphorylated on a specific motif recognized by the POLO box domains. Phosphorylates CENPJ, NPM1, RAPGEF2, RASGRF1, SNCA, SIPA1L1 and SYNGAP1. Plays a key role in synaptic plasticity and memory by regulating the Ras and Rap protein signaling: required for overactivity-dependent spine remodeling by phosphorylating the Ras activator RASGRF1 and the Rap inhibitor SIPA1L1 leading to their degradation by the proteasome. Conversely, phosphorylates the Rap activator RAPGEF2 and the Ras inhibitor SYNGAP1, promoting their activity. Also regulates synaptic plasticity independently of kinase activity, via its interaction with NSF that disrupts the interaction between NSF and the GRIA2 subunit of AMPARs, leading to a rapid rundown of AMPAR-mediated current that occludes long term depression. Required for procentriole formation and centriole duplication by phosphorylating CENPJ and NPM1, respectively. Its induction by p53/TP53 suggests that it may participate in the mitotic checkpoint following stress. {ECO:0000269PubMed:15242618, ECO:0000269PubMed:19001868, ECO:0000269PubMed:20352051, ECO:0000269PubMed:20531387}.

Subcellular Localization

Cytoplasm, cytoskeleton, microtubule organizing center, centrosome, centriole {ECO:0000269PubMed:15242618, ECO:0000269PubMed:19001868}. Cell projection, dendrite {ECO:0000250}. Note=Localizes to centrosomes during early G1 phase where it only associates to the mother centriole and then distributes equally to both mother and daughter centrioles at the onset of S phase.

Disease Associations

Tissue Specificity

Expressed at higher level in the fetal lung, kidney, spleen and heart. {ECO:0000269PubMed:11696980}.

Comments

Interactions

Number of Interactions

This gene and/or its encoded proteins are associated with 15 experimentally validated interaction(s) in this database.

Experimentally validated
Total	15 [view]
Protein-Protein	12 [view]
Protein-DNA	1 [view]
Protein-RNA	0
DNA-DNA	2 [view]
RNA-RNA	0
DNA-RNA	0

Gene Ontology

Molecular Function

Accession	GO Term
GO:0004672	protein kinase activity
GO:0004674	protein serine/threonine kinase activity
GO:0004713	protein tyrosine kinase activity
GO:0004871	signal transducer activity
GO:0005515	protein binding
GO:0005524	ATP binding
GO:0016772	transferase activity, transferring phosphorus-containing groups
GO:0032403	protein complex binding

Biological Process

GO:0000082	G1/S transition of mitotic cell cycle
GO:0000278	mitotic cell cycle
GO:0006468	protein phosphorylation
GO:0007052	mitotic spindle organization
GO:0007093	mitotic cell cycle checkpoint
GO:0007265	Ras protein signal transduction
GO:0007613	memory
GO:0032092	positive regulation of protein binding
GO:0032436	positive regulation of proteasomal ubiquitin-dependent protein catabolic process
GO:0032486	Rap protein signal transduction
GO:0043066	negative regulation of apoptotic process
GO:0043123	positive regulation of I-kappaB kinase/NF-kappaB signaling
GO:0046599	regulation of centriole replication
GO:0048167	regulation of synaptic plasticity
GO:0060291	long-term synaptic potentiation
GO:0060292	long term synaptic depression
GO:0061000	negative regulation of dendritic spine development

Cellular Component

GO:0005622	intracellular
GO:0005813	centrosome
GO:0005814	centriole
GO:0030425	dendrite

Protein Structure and Domains

PDB ID

InterPro

IPR000719 Protein kinase domain
IPR000959 POLO box duplicated domain
IPR001245 Serine-threonine/tyrosine-protein kinase catalytic domain
IPR002290 Serine/threonine/dual specificity protein kinase, catalytic domain
IPR011009 Protein kinase-like domain
IPR020635 Tyrosine-protein kinase, catalytic domain

PFAM

PF00069
PF00659
PF07714

PRINTS

PR00109

PIRSF

SMART

SM00220
SM00219

TIGRFAMs

Post-translational Modifications

Modification

Cross-References

SwissProt