Rabbit anti-Human WIPI2 Polyclonal Antibody

Uniprot Id

Q9Y4P8

Target Species

Human

Target Name

WIPI2

Target Full Name

WD repeat domain phosphoinositide-interacting protein 2

Target Function

Component of the autophagy machinery that controls the major intracellular degradation process by which cytoplasmic materials are packaged into autophagosomes and delivered to lysosomes for degradation. Involved in an early step of the formation of preautophagosomal structures. Binds and is activated by phosphatidylinositol 3-phosphate (PtdIns3P) forming on membranes of the endoplasmic reticulum upon activation of the upstream ULK1 and PI3 kinases. Mediates ER-isolation membranes contacts by interacting with the ULK1:RB1CC1 complex and PtdIns3P. Once activated, WIPI2 recruits at phagophore assembly sites the ATG12-ATG5-ATG16L1 complex that directly controls the elongation of the nascent autophagosomal membrane.; Recruits the ATG12-ATG5-ATG16L1 complex to omegasomes and preautophagosomal structures, resulting in ATG8 family proteins lipidation and starvation-induced autophagy. Isoform 4 is also required for autophagic clearance of pathogenic bacteria. Isoform 4 binds the membrane surrounding Salmonella and recruits the ATG12-5-16L1 complex, initiating LC3 conjugation, autophagosomal membrane formation, and engulfment of Salmonella.

Target Subcellular Location

Preautophagosomal structure membrane; Peripheral membrane protein; Cytoplasmic side.

Target Protein Families

WD repeat SVP1 family

Target Tissue Specificity

Ubiquitously expressed (at protein level). Highly expressed in heart, skeletal muscle and pancreas. Expression is down-regulated in pancreatic and in kidney tumors.

Target Synonyms

ATG18B; Atg21; CGI 50; DKFZp434J154; DKFZp686P02188; FLJ12979; FLJ14217; FLJ42984; WD repeat domain phosphoinositide-interacting protein 2; WD repeat domain; phosphoinositide interacting 2; WD40 repeat protein interacting with phosphoinositides 2; WIPI 2; WIPI-2; WIPI2; WIPI2_HUMAN; WIPI49 like protein 2; WIPI49-like protein 2

Target Background

WD40 repeat proteins are key components of many essential biologic functions. They regulate the assembly of multiprotein complexes by presenting a beta-propeller platform for simultaneous and reversible protein-protein interactions. Members of the WIPI subfamily of WD40 repeat proteins, such as WIPI2, have a 7-bladed propeller structure and contain a conserved motif for interaction with phospholipids (Proikas-Cezanne et al., 2004 [PubMed 15602573]).