Developmental competence and the induction of ectopic proboscises in Drosophila melanogaster

Developmental competence is the response of a cell(s) to information. Determination of adult labial identity in Drosophila requires Proboscipedia (PB) and Sex combs reduced (SCR); however, co-ectopic expression of PB and SCR is not sufficient for induction of ectopic adult labial identity, because t...

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Bibliographic Details
Published in:Development Genes and Evolution Vol. 223; no. 6; pp. 375 - 387
Main Authors: Percival-Smith, Anthony, Sivanantharajah, Lovesha, Pelling, Jacob J. H, Teft, Wendy A
Format: Journal Article
Language:English
Published: Berlin/Heidelberg Springer-Verlag 01.11.2013
Springer Berlin Heidelberg
Springer Nature B.V
Subjects:
adults
Amino Acid Motifs
Animal Genetics and Genomics
Animals
Arthropod Antennae
Arthropod Antennae - growth & development
Biomedical and Life Sciences
Cell Biology
chemistry
Competence factor
Conserved sequence
Developmental Biology
Drosophila melanogaster
Drosophila melanogaster - growth & development
Drosophila melanogaster - metabolism
Drosophila melanogaster - ultrastructure
Drosophila Proteins
Drosophila Proteins - chemistry
Drosophila Proteins - metabolism
Ectopic expression
evolution
Evolutionary Biology
growth & development
Homeodomain Proteins
Homeodomain Proteins - metabolism
Insects
larvae
Life Sciences
metabolism
Metamorphosis
mice
Original Article
Plant Genetics and Genomics
Proboscis
Salivary Glands
Salivary Glands - growth & development
Tarsus, Animal
Tarsus, Animal - growth & development
Transcription Factors
Transcription Factors - chemistry
Transcription Factors - metabolism
ultrastructure
Zoology
Segmental identity
Sex combs reduced
Developmental competence
Conservation of Hox function
Proboscipedia
ISSN:0949-944X, 3059-3239, 1432-041X, 1432-041X, 3059-3247
Online Access:Get full text
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Summary:Developmental competence is the response of a cell(s) to information. Determination of adult labial identity in Drosophila requires Proboscipedia (PB) and Sex combs reduced (SCR); however, co-ectopic expression of PB and SCR is not sufficient for induction of ectopic adult labial identity, because the developmental information supplied by PB and SCR is suppressed. The evolutionarily conserved LASCY, DYTQL, NANGE motifs, and the C-terminal domain of SCR are sequence elements that mediate some, or all, of the suppression of ectopic proboscis determination. Therefore, the developmentally competent primordial proboscis cells provide an environment devoid of suppression, allowing PB and SCR to determine proboscis identity. SCR derivatives lacking suppression sequences weakly induce ectopic proboscis transformations independently of PB, suggesting that SCR may be the activity required for induction of adult labial identity, as is the case for larval labial identity. A possible explanation for PB independence of SCR in determination of adult and embryonic labial identity is PB operates as a competence factor that switches SCR from determining T1 identity to labial identity during metamorphosis. Lastly, labial determination is not conserved between SCR and murine HOXA5, suggesting that SCR has acquired this activity during evolution.
Bibliography:http://dx.doi.org/10.1007/s00427-013-0454-8
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ISSN:0949-944X
3059-3239
1432-041X
1432-041X
3059-3247
DOI:10.1007/s00427-013-0454-8