PIP5K1A

Gene Information

Official Symbol: PIP5K1A
Official Name: phosphatidylinositol-4-phosphate 5-kinase type 1 alpha
Aliases and Previous Symbols: N/A
Entrez ID: 8394
UniProt: Q99755
Interactions: BioGRID
PubMed articles: Open PubMed
OMIM: Open OMIM

Function Summary

Entrez Summary: N/A
UniProt Summary: Catalyzes the phosphorylation of phosphatidylinositol 4- phosphate (PtdIns4P) to form phosphatidylinositol 4,5-bisphosphate (PtdIns(4,5)P2). PtdIns(4,5)P2 is involved in a variety of cellular processes and is the substrate to form phosphatidylinositol 3,4,5-trisphosphate (PtdIns(3,4,5)P3), another second messenger. The majority of PtdIns(4,5)P2 is thought to occur via type I phosphatidylinositol 4-phosphate 5-kinases given the abundance of PtdIns4P. Participates in a variety of cellular processes such as actin cytoskeleton organization, cell adhesion, migration and phagocytosis. Required for membrane ruffling formation, actin organization and focal adhesion formation during directional cell migration by controlling integrin-induced translocation of RAC1 to the plasma membrane. Together with PIP5K1C is required for phagocytosis, but they regulate different types of actin remodeling at sequential steps. Promotes particle ingestion by activating WAS that induces Arp2/3 dependent actin polymerization at the nascent phagocytic cup. Together with PIP5K1B is required after stimulation of G-protein coupled receptors for stable platelet adhesion. Plays a role during calcium-induced keratinocyte differentiation. Recruited to the plasma membrane by the E-cadherin/beta-catenin complex where it provides the substrate PtdIns(4,5)P2 for the production of PtdIns(3,4,5)P3, diacylglycerol and inositol 1,4,5-trisphosphate that mobilize internal calcium and drive keratinocyte differentiation. Together with PIP5K1C have a role during embryogenesis. Functions also in the nucleus where acts as an activator of TUT1 adenylyltransferase activity in nuclear speckles, thereby regulating mRNA polyadenylation of a select set of mRNAs. {ECO:0000269|PubMed:18288197, ECO:0000269|PubMed:19158393, ECO:0000269|PubMed:20660631}.

Pfam Domains GO Terms

CRISPR Data

Compound Hit Most Correlated Genes in Chemogenomics Tissues where Essential in the Avana Dataset (DepMap 20Q1)

Screen	Score
Tunicamycin 0.04 to 0.075μM on day4 R07 exp419	-1.89

Gene	Correlation
RRM1	0.473
HGC6.3	0.424

Global Fraction of Cell Lines Where Essential: 2/739

Tissue	Fraction Of Cell Lines Where Essential
1290807.0	0/1
909776.0	0/1
bile duct	0/28
blood	0/28
bone	0/26
breast	0/33
central nervous system	0/56
cervix	0/4
colorectal	0/17
esophagus	0/13
fibroblast	0/1
gastric	0/16
kidney	0/21
liver	0/20
lung	1/75
lymphocyte	0/16
ovary	0/26
pancreas	0/24
peripheral nervous system	1/16
plasma cell	0/15
prostate	0/1
skin	0/24
soft tissue	0/9
thyroid	0/2
upper aerodigestive	0/22
urinary tract	0/29
uterus	0/5

Essentiality in NALM6

Essentiality Rank: 2787
Expression level (log2 read counts): 6.4

Expression Distribution