The cell morphogenesis gene ANGUSTIFOLIA encodes a CtBP/BARS-like protein and is involved in the control of the microtubule cytoskeleton.
The ANGUSTIFOLIA (AN) gene is required for leaf hair (trichome) branching and is also involved in polarized expansion underlying organ shape. Here we show that the AN gene encodes a C-terminal binding proteins/brefeldin A ADP-ribosylated substrates (CtBP/BARS) related protein. AN is expressed at low levels in all organs and the AN protein is localized in the cytoplasm. In an mutant trichomes, the organization of the actin cytoskeleton is normal but the distribution of microtubules is aberrant. A role of AN in the control of the microtubule cytoskeleton is further supported by the finding that AN genetically and physically interacts with ZWICHEL, a kinesin motor molecule involved in trichome branching. Our data suggest that CtBP/BARS-like protein function in plants is directly associated with the microtubule cytoskeleton.
Folkers
U
U
ZMBP, Entwicklungsgenetik, Universität Tübingen, Auf der Morgenstelle 1, D-72076 Tübingen, Germany.
Kirik
V
V
Schöbinger
U
U
Falk
S
S
Krishnakumar
S
S
Pollock
M A
MA
Oppenheimer
D G
DG
Day
I
I
Reddy
A S M
AS
Jürgens
G
G
Hülskamp
M
M
Reddy
A R
AR
D000429:Alcohol Oxidoreductases; D000595:Amino Acid Sequence; D000818:Animals; D029681:Arabidopsis Proteins / Q000145:classification / Q000235:genetics / Q000378:metabolism / Q000502:physiology*; D002148:Calmodulin-Binding Proteins / Q000235:genetics / Q000378:metabolism; D002352:Carrier Proteins; D003001:Cloning, Molecular; D017124:Conserved Sequence; D003599:Cytoskeleton / Q000378:metabolism / Q000502:physiology; D004268:DNA-Binding Proteins / Q000145:classification / Q000235:genetics / Q000378:metabolism / Q000502:physiology*; D019143:Evolution, Molecular; D015870:Gene Expression; D017343:Genes, Plant; D007424:Intracellular Fluid / Q000378:metabolism; D008870:Microtubules / Q000378:metabolism / Q000502:physiology*; D008969:Molecular Sequence Data; D009024:Morphogenesis; D016296:Mutagenesis; D010750:Phosphoproteins; D010940:Plant Proteins / Q000145:classification / Q000235:genetics / Q000378:metabolism / Q000502:physiology*; D012097:Repressor Proteins / Q000145:classification / Q000235:genetics / Q000378:metabolism / Q000502:physiology*; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid; D014157:Transcription Factors
D000429:Alcohol Oxidoreductases; D029681:Arabidopsis Proteins; D002148:Calmodulin-Binding Proteins; D002352:Carrier Proteins; D004268:DNA-Binding Proteins; D010750:Phosphoproteins; D010940:Plant Proteins; D012097:Repressor Proteins; D014157:Transcription Factors; C452846:DETORQEO protein, Arabidopsis; C119945:Ctbp1 protein, rat; C099551:KCBP protein, Arabidopsis; C096794:C-terminal binding protein