PIAS-like protein Zimp7 is required for the restriction of the zebrafish organizer and mesoderm development.
The Zmiz2 (Zimp7) protein and its homolog Zmiz1 (Zimp10) were initially identified in humans as androgen receptor co-activators. Sequence analysis revealed the presence of an SP-RING/Miz domain, which is highly conserved in members of the PIAS family and confers SUMO-conjugating activity. Zimp7 has been shown to interact with components of the Wnt/β-Catenin signaling pathway and with Brg1 and BAF57, components of the ATP-dependent mammalian SWI/SNF-like BAF chromatin-remodeling complexes. In this work, we analyze the role of zygotic Zimp7 in zebrafish development. We describe evidence indicating that Zimp7 is required for mesoderm development and dorsoventral patterning. Morpholino-mediated reduction of zygotic Zimp7 produced axial mesodermal defects that were preceded by up-regulation of organizer genes such as bozozok, goosecoid and floating head at the onset of gastrulation and by down-regulation of the ventral markers vox, vent and eve1 indicating loss of the ventrolateral mesoderm. Consistently, embryos overexpressing zimp7 RNA exhibited midline defects such as loss of forebrain and cyclopia accompanied by transcriptional changes directly opposite of those found in the morphants. In addition, the patterning of ventralized embryos produced by the overexpression of vox and vent was restored by a reduction of Zimp7 activity. Altogether, our findings indicate that Zimp7 is involved in transcriptional regulation of factors that are essential for patterning in the dorsoventral axis.
Departamento de Genética del Desarrollo y Fisiología Molecular Instituto de Biotecnología, Universidad Nacional Autónoma de México, Mexico.
Roberto
R
Moreno-Ayala
Departamento de Genética del Desarrollo y Fisiología Molecular Instituto de Biotecnología, Universidad Nacional Autónoma de México, Mexico.
Denhí
D
Schnabel
Departamento de Genética del Desarrollo y Fisiología Molecular Instituto de Biotecnología, Universidad Nacional Autónoma de México, Mexico.
Enrique
E
Salas-Vidal
Departamento de Genética del Desarrollo y Fisiología Molecular Instituto de Biotecnología, Universidad Nacional Autónoma de México, Mexico. Electronic address: hilda@ibt.unam.mx.
Hilda
H
Lomelí
D000818:Animals; D036703:Blastula / Q000378:metabolism; D019521:Body Patterning / Q000235:genetics*; D054262:Gastrulation / Q000235:genetics; D018507:Gene Expression Regulation, Developmental; D055785:Gene Knockdown Techniques; D051956:Goosecoid Protein / Q000096:biosynthesis; D018398:Homeodomain Proteins / Q000096:biosynthesis; D008648:Mesoderm / Q000196:embryology; D060172:Morpholinos / Q000235:genetics; D020897:Organizers, Embryonic / Q000196:embryology*; D050828:Protein Inhibitors of Activated STAT / Q000235:genetics / Q000378:metabolism*; D012333:RNA, Messenger / Q000096:biosynthesis; D012097:Repressor Proteins / Q000096:biosynthesis; D015534:Trans-Activators / Q000235:genetics; D014157:Transcription Factors / Q000096:biosynthesis; D014158:Transcription, Genetic / Q000235:genetics; D015027:Zebrafish / Q000196:embryology*; D029961:Zebrafish Proteins / Q000096:biosynthesis / Q000235:genetics / Q000378:metabolism*; D016335:Zinc Fingers / Q000235:genetics*
C554288:Eve1 protein, zebrafish; D051956:Goosecoid Protein; D018398:Homeodomain Proteins; D060172:Morpholinos; D050828:Protein Inhibitors of Activated STAT; D012333:RNA, Messenger; D012097:Repressor Proteins; D015534:Trans-Activators; D014157:Transcription Factors; C434249:Vox protein, zebrafish; D029961:Zebrafish Proteins; C000601101:Zmiz2 protein, zebrafish; C113874:dharma protein, zebrafish; C497995:gsc protein, zebrafish; C096660:noto protein, zebrafish; C434250:vent protein, zebrafish
Dorsal organizer; Mesoderm development; Zebrafish; Zimp7