De Novo TANGLED1 Recruitment from the Phragmoplast to Aberrant Cell Plate Fusion Sites in Maize

Overview

Journal J Cell Sci

Specialty Cell Biology

Date 2024 Jun 4

PMID 38832513

Authors

Aimee N Uyehara

Beatrice N Diep

Lindy A Allsman

Sarah G Gayer

Stephanie E Martinez

Janice J Kim

Shreya Agarwal

Carolyn G Rasmussen

Affiliations

Soon will be listed here.

Abstract

Division plane positioning is crucial for proper growth and development in many organisms. In plants, the division plane is established before mitosis, by accumulation of a cytoskeletal structure called the preprophase band (PPB). The PPB is thought to be essential for recruitment of division site-localized proteins, which remain at the division site after the PPB disassembles. Here, we show that the division site-localized protein TANGLED1 (TAN1) is recruited independently of the PPB to the cell cortex by the plant cytokinetic machinery, the phragmoplast, from experiments using both the PPB-defective mutant discordia1 (dcd1) and chemical treatments that disrupt the phragmoplast in maize. TAN1 recruitment to de novo sites on the cortex is partially dependent on intact actin filaments and the myosin XI motor protein OPAQUE1 (O1). These data imply a yet unknown role for TAN1 and possibly other division site-localized proteins during the last stages of cell division when the phragmoplast touches the cell cortex to complete cytokinesis.

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