PMID- 21677511 OWN - NLM STAT- MEDLINE DCOM- 20111222 LR - 20211020 IS - 1933-6926 (Electronic) IS - 1933-6918 (Print) IS - 1933-6918 (Linking) VI - 5 IP - 4 DP - 2011 Jul-Aug TI - Tuba and N-WASP function cooperatively to position the central lumen during epithelial cyst morphogenesis. PG - 344-50 AB - The process of epithelial lumenogenesis requires coordination of a network of signaling machinery communicated to each cell through subsequent cell divisions. Formation of a single hollow lumen has previously been shown to require Tuba, a Cdc42 GEF, for Cdc42 activation and correct spindle orientation. Using a Caco-2 model of lumenogenesis, we show that knockdown (KD) of the actin regulator N-WASP, causes a multilumen phenotype similar to Tuba KD. Defects in lumenogenesis in Tuba KD and N-WASP KD cells are observed at the two cell stage with inappropriate marking of the pre-apical patch (PAP) - the precursor to lumen formation. Strikingly, both Tuba and N-WASP depend on each other for localization to the PAP. We conclude that N-WASP functions cooperatively with Tuba to facilitate lumenogenesis and this requires the polyproline region of N-WASP. FAU - Kovacs, Eva M AU - Kovacs EM AD - Division of Molecular Cell Biology, Institute for Molecular Bioscience, The University of Queensland-St. Lucia, QLD, Australia. FAU - Verma, Suzie AU - Verma S FAU - Thomas, Steven G AU - Thomas SG FAU - Yap, Alpha S AU - Yap AS LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20110701 PL - United States TA - Cell Adh Migr JT - Cell adhesion & migration JID - 101469464 RN - 0 (Antigens, CD) RN - 0 (CDH1 protein, human) RN - 0 (Cadherins) RN - 0 (Cytoskeletal Proteins) RN - 0 (DNMBP protein, human) RN - 0 (Peptides) RN - 0 (RNA, Small Interfering) RN - 0 (WASL protein, human) RN - 0 (Wiskott-Aldrich Syndrome Protein, Neuronal) RN - 25191-13-3 (polyproline) RN - EC 3.6.5.2 (cdc42 GTP-Binding Protein) SB - IM MH - Actin Cytoskeleton/metabolism MH - Antigens, CD MH - Caco-2 Cells MH - Cadherins/metabolism MH - Cell Division MH - Cell Polarity MH - Cloning, Molecular MH - Cytoskeletal Proteins/*metabolism MH - Epithelial Cells/cytology/*metabolism MH - Gene Knockdown Techniques MH - Humans MH - Lentivirus/genetics MH - *Morphogenesis MH - Peptides/metabolism MH - RNA Interference MH - RNA, Small Interfering/genetics/metabolism MH - Signal Transduction MH - Spindle Apparatus/metabolism MH - Transfection MH - Wiskott-Aldrich Syndrome Protein, Neuronal/*metabolism MH - cdc42 GTP-Binding Protein/metabolism PMC - PMC3210302 EDAT- 2011/06/17 06:00 MHDA- 2011/12/23 06:00 PMCR- 2012/07/01 CRDT- 2011/06/17 06:00 PHST- 2011/06/17 06:00 [entrez] PHST- 2011/06/17 06:00 [pubmed] PHST- 2011/12/23 06:00 [medline] PHST- 2012/07/01 00:00 [pmc-release] AID - 16717 [pii] AID - 1933-6918-5-4-9 [pii] AID - 10.4161/cam.5.4.16717 [doi] PST - ppublish SO - Cell Adh Migr. 2011 Jul-Aug;5(4):344-50. doi: 10.4161/cam.5.4.16717. Epub 2011 Jul 1.