CnNK-2, an NK-2 homeobox gene, has a role in patterning the basal end of the axis in hydra.

Abstract:

:NK-2-class homeobox genes have been identified in a variety of metazoans, from sponges to arthropods and vertebrates, and have been shown to play roles in a variety of cell and tissue specifications. Here we describe the characterization of the NK-2 homolog CnNK-2 from Hydra vulgaris, a freshwater cnidarian. CnNK-2 expression is restricted to the endodermal epithelial cells of hydra and is primarily in the peduncle, the lower end of the body column. In some species it is graded along the apical-basal axis with a maximum in the basal tissue of the lower peduncle, adjacent to the foot. CnNK-2 expression invariably precedes foot formation as part of the normal tissue dynamics of the adult as well as during asexual reproduction by budding, foot regeneration, or ectopic foot formation. Manipulations which alter the gradient of positional value along this axis affect CnNK-2 expression in a manner which indicates that expression of this gene is closely linked to the gradient. The normal and altered patterns of expression of this gene extend the understanding of the regulation of foot formation in hydra.

journal_name

Dev Biol

journal_title

Developmental biology

authors

Grens A,Gee L,Fisher DA,Bode HR

doi

10.1006/dbio.1996.0321

subject

Has Abstract

pub_date

1996-12-15 00:00:00

pages

473-88

issue

2

eissn

0012-1606

issn

1095-564X

pii

S0012-1606(96)90321-8

journal_volume

180

pub_type

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